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Volume 94-B, Issue SUPP_XXII May 2012 British Orthopaedic Foot & Ankle Society (BOFAS)

Foot & Ankle
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D. Singh

One of the complications of hallux valgus surgery is shortening of the first metatarsal and this becomes particularly symptomatic in patients with a pre existing short metatarsal (Morton's foot or Greek foot). Initial treatment consists of appropriate insoles which incorporate not only relief of pain due to pressure metatarsalgia under the lesser metatarsal heads but also a Morton type extension under the big toe. Insoles with metatarsal relief are, however, not always well tolerated and surgery becomes necessary. The options are to shorten the lesser metatarsal heads or lengthen the previously shortened first metatarsal. Arthrodesis of the great toe metatarso-phalangeal joint can provide functional length to the first metatarsal.

We have achieved good results in lengthening of the first metatarsal and believe that it is a safe option which avoids trauma to the lesser metatarso-phalangeal joints. The technique is presented and depends on whether there is a residual hallux valgus or whether the toe is well aligned. The operation should address the plane of the deformity and reverse the cause of the lengthening.

Emphasis should however be placed in not getting the complication in the first instance and the incidence of the problematic short first metatarsal has significantly reduced since the decrease in popularity of the Wilson osteotomy.


S. Haddad

Congenital hallux varus had been a well-described condition for many years before acquired hallux varus as a condition arising from bunion correction was not described until 1935. In that year, McBride discussed this potential problem when describing this as a potential problem from his described technique, identifying possible mechanisms to prevent the disorder from occurring. Authors such as Joplin and Kelikian echoed the concept in the early 1960's, spawning a series of corrective procedures. Miller brought this to common practice in 1975, describing the tendon imbalance seen across the precarious 1st MTP joint.

The first metatarsophalangeal joint moves in the sagittal plane, dorsiflexion and plantarflexion only. Four intrinsic muscles stabilize the digit, with the abductor and adductor hallucis taking the lion share of this function. The abductor tendon actually functions primarily as a plantarflexor of the first metatarsophalangeal joint 83% of the time (Thompson) due to its primary plantar location. This fact, in combination with the pronation generally seen in severe bunion deformities, contributes to acquired hallux varus following bunion correction. Besides the obvious cause of over-correction of the metatarsal osteotomy creating hallux varus, imbalance of the tendon complex post-operatively can create an equally catastrophic circumstance. Hawkins demonstrated that severing the adductor tendon complex (the conjoined tendon) will not product hallux varus when the hallux is not rotated. However, in more severe hallux valgus, pronation of the hallux may be proportional to the deformity of the hallux itself. This rotational deformity places the insertions of the abductor (and medial insertion of the flexor brevis) more plantarward and lateral, increasing the valgus deformity. If the entire conjoined tendon is sectioned and the internal rotation deformity corrected the insertion of the contracted abductor moves medially, pulling the toe into varus. If the center of the base of the proximal phalanx is brought beyond the mid-point of the first metatarsal head, the extensor hallucis longus will bowstring, pulling the great toe into varus while creating a hallux flexus deformity. Finally, if the lesser toes are in varus and not corrected, this deforming force will create hallux varus following bunion correction with a lateral release. The message is clear: not all patients require a lateral release, and, if done, should be done with caution.

Once present, correction can be difficult. Tendon transfers utilizing the extensor hallucis longus (Johnson) or extensor hallucis brevis (Myerson) only have beneficial effects in non-arthritic, mobile first metatarsophalangeal joints. In addition, if metatarsal deformity is not corrected, the deformity will recur. Thus, in many circumstances, arthrodesis of the first metatarsophalangeal joint becomes the treatment of choice, and is commensurate with a disappointed patient who underwent a primary bunion correction and was left with a fused great toe.

This lecture will explore the above mechanism and salvage situations, in hopes of eliminating this unwelcomed outcome from your practice.


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M. S. Davies

A Morton's neuroma is a compressive neuropathy most commonly affecting the common digital nerve of the third inter-space. Symptoms are variable but usually the diagnosis can be made quite easily and the diagnosis is essentially a “clinical” one. When symptoms relate to the second inter-space the clinician needs to be alert to mechanical causes of metatarsalgia leading to secondary irritation of the nerve. Imaging with MRI scanning and/or ultrasound can be helpful but equally can be misleading, as there may be false positives and false negatives. In the case of ultrasound the accuracy of imaging depends on the experience and expertise of the radiologist.

Morton's neuroma surgery is usually associated with high levels of success but some reports suggest as many as 30% of patients under-going such surgery are dissatisfied with the outcome. The reasons for failed surgery can be broadly divided into three groups: a) wrong diagnosis b) wrong surgery and c) right diagnosis and right operation but unfavourable outcome. Wrong diagnosis is most commonly encountered in second space pathology when there is an underlying mechanical reason for the symptoms such as second MTP joint synovitis. This is usually secondary to joint overload associated with first ray insufficiency eg hallux valgus. This is the so-called Moron's neuroma. Wrong surgery occurs when the wrong space is operated upon, when mechanical causes are overlooked or when a plantar incision is made over the weight-bearing part of the forefoot, leading to painful scar formation. Wrong surgery can also involve failure to recognise anomalous anatomy within the space or insufficient nerve resection. Unfavourable outcomes include infection, stump neuroma formation or the onset of CRPS. Occasionally despite an appropriate assessment and operation a patient will derive no relief of symptoms and the cause of the pain remains totally unexplained.

Careful history and examination and careful pre-operative planning can reduce the incidence of failed Morton's neuroma surgery. The role of imaging is probably greater in such cases compared with those presenting with a primary Morton's neuroma but the diagnosis remains essentially clinical. Stump neuroma resection should be considered in patients presenting with repeat symptoms especially if there is initial surgical success followed by recurrent symptoms. If two explorations result in no success then a third exploration is unlikely to resolve the problem. Some patients are left with intractable symptoms and should be referred to a pain specialist, as further surgery often has nothing more to offer.


D. Redfern

I consider the term ‘minimally invasive surgery’ (MIS) to represent a wide range of techniques directed at achieving a surgical objective with less collateral tissue damage. The surgeon choosing to employ such techniques may aspire to achieve improved or more consistent outcome for their patients but is this so? What are the complications? In certain areas of surgery the concept of MIS is well established (e.g. knee and ankle arthroscopy). In forefoot surgery the concept has been met with interest but also skepticism. Much of this skepticism pivots around concerns that the loss of direct vision (maintained in arthroscopic techniques) may increase the risk of complications. In other words, there is a concern that due to the loss of direct visualization (replaced by intra-operative xray imaging), any benefit that might arise from the less invasive technique of the operation will be negated by either poorer quality of surgical correction or higher risk of injury to adjacent structures. All surgery is associated with a degree of risk and in considering the complications specifically associated with MIS of the forefoot we must try to separate out those complications related to the specific MIS technique involved and those that are not. In other words, we need to identify whether the complication has occurred as a result of incorrect surgical planning (e.g. wrong choice of osteotomy/flaws in surgical objective), poor execution of the surgical technique, or as a result of the MIS instrumentation/equipment. I will discuss the above in relation to my experience of complications encountered whilst employing minimally invasive surgical techniques in the treatment of forefoot pathology over the last 2 years.


C. Saltzman

Fusion remains the standard of care and is associated with a high satisfaction rate. But.… fusion generally requires 6 weeks of restricted weight bearing or immobilization. Potential problems include 1) nonunion, 2) malunion, 3) sesamoid pain (from DJD), 4) late onset IP1 DJD.

Complete joint replacement has been performed with a number of different designs since the early 1970's. The metal and poly designed implants are associated with a high failure rate, presumably from high shear loads, eccentric axial loads, poor fixation and bone stock problems. Resurfacing of both sides of the joint with a one piece silicone based crosslinked rubber {“silastic”} in rheumatoid patients appears to function better with use of metal grommets to reduce generation of particle debris and foreign body reaction. These silastic implants are still used by surgeons in select low-demand rheumatoid patients. Salvage after failure of any of these total joint replacements can be challenging because of loss of bone stock.

3 other methods are used to resurface the joint in severe OA: 1) resurfacing the proximal phalangeal side only, 2) resurfacing the metatarsal head only and 3) resurfacing the joint with and interposition arthroplasty. 1) advantage of the proximal phalangeal side resurfacing is simplicity of geometry; the disadvantage is disruption of the FHB attachment and the relative scarcity of severe cartilage damage at that side of the joint. 2) Advantage of the metatarsal head side for resurfacing is that is the typical location of the arthritic change; the disadvantage is potential interference with the sesamoid complex and bulkiness of fixation could lead to a more difficult salvage. 3) The advantage of interposition arthroplasty is the maintenance of bone stock; disadvantages include inconsistent local tissue and somewhat less predictable outcomes.

In this talk I will focus primarily on the technique and results of a proximal phalangeal resurfacing approach for OA of the MTP1 joint.


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C. Saltzman

Diagnosis

a. History and exam

i. True Lisfranc fracture dislocations are NOT difficult to diagnose

b. Midfoot sprains or subtle injuries

i. These are DIFFICULT to diagnose

- subtle x-ray findings with minimal displacement

i) Exam: - be “suspicious” of midfoot sprains

- TMT tenderness, swelling

- inability to WB

ii) Mechanism of injury:

- indirect twisting injury (athletic)

- crush injury of the foot (trauma)

- axial forefoot loading (dancers, jumpers)

iii) Investigations:

- X-rays usually normal or subtle widening

need to assess all 3 views in detail

standing AP compare to the other side

-Stress x-rays: - if clinical symptoms indicate - severe injury + pain but x-ray looks normal

- MRI useful for anatomic/instability correlation

- CT scan good for subtle injuries/fractures and displacement

- Bone scan positive in subacute/chronic pain situation

Treatment

a) Surgical Indications

i) Any displacement/positive stress xrays/test

ii) Surgical technique

- open reduction or closed and percutaneus fixation

- anatomic reduction essential

- NWB period up to 6 weeks

- WB with protection for another 4-6 weeks

iii. Screw vs tightrope fixation

iv. Hardware removal

b) Non-operative

i) Stable non-displaced sprain (need to make sure this is stable, ie stress views)

- 6 to 8 weeks NWB

- expect prolonged recovery up to 6 months with

proper treatment

Controversial Issues:

a. Do all injuries with mild displacement have to be fixed operatively?

b. Arthrodesis vs fixation for soft tissue lisfranc with mild displacement?

c. Arthrodesis vs fixation subacute or chronic presentation?

d. Hardware removal?


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P. Cooke

Surgery to the midfoot (usually fusion) may be performed for trauma, arthritis, deformity or combinations.

There are reports of good results, meaning primary fusion rates of 90+percent, 12 % serious complication rates and need for hardware removal 1n 25% of cases from specialist centres (Nemec et al AOFAS 2010). But even these good results mean 10% of patients needing lengthy revision surgery, and a third needing some additional intervention.

Surgery to the midfoot, like all surgery has both consequences (which everyone experiences) and complications (which some peolple get).

The consequences of midfoot surgery are time in hospital, long periods in cast (often non-weight bearing) and long rehabilitation periods leading to a “second best” result where pain is relieved, but mechanics and full function are not restored, and longterm stiffness and swelling are comon. Usually the patient still needs to restrict activities and wear orthotics or adaptive footwear.

The commonest complication is probably a failure to inform patients of the consequences of surgery – inevitably leading to disappointment with result and outcome.

Common complications include:

Wound, nerve and vascular problems.

Delayed union, malunion and non-union.

General complications such as DVT and embolism.

All these complications are more common in patients who smoke, are diabetic or have a BMI over 30.

By showing examples of problems seen in the last 15 years of tertiary referral (and the authors own cases), a system to minimise complications, and to address them when they occur, will be presented, based on:

Good preparation and timely accurate information

Planning surgery (approach, execution and post operative management)

Rehailitation and after surgery care.

These can usually only be brought together by a surgeon performing this surgery on a regular basis, and with the support of an equally experienced multi-disciplinary team.


S. Haddad

Most of the controversy surrounding management of the adult acquired flatfoot deformity revolves around the correction of Stage 2 deformity. Stage 1 deformity, uncommonly corrected surgically, involves tenosynovitis with preservation of tendon length and absence of structural deformity. Attempts at tenosynovectomy in light of structural deformity leads to operative failure, found in 10% of Teasdall and Johnson's 1992 patient population. Thus, with tenosynovectomy rarely becoming an operative situation, Stage 2 deformity becomes the mainstay of operative treatment of the adult flatfoot. Stage 2 deformity patients present with swelling medially, the inability to do a single heel raise, with a passively correctable subtalar joint. The tendon is functionally torn. In recent years, authors have subdivided Stage 2 deformity even further into A and B subcategories, where A involves less than 50% uncovering of the talonavicular joint, and B patients more than 50%. Recently, Anderson has added a C subtype, which may be applied to either A and B patients, in patients who have forefoot varus. Thus, Stage 2 patients suffer from pain that begins medially and progresses to the subfibular region over time. Most important, recognition of the continued sub classification in Stage 2 disease echoes the fact that this disorder is on a continuum, challenging the surgeon to recognize subtleties that, if unrecognized, lead to a poor patient outcome. The mainstay of treatment in Stage 2 disease is the medial slide calcaneal osteotomy, which realigns the hindfoot axis reducing valgus, improves the medial arch, protects the FDL tendon transfer, and allows the Achilles tendon to become a strong inverter. Over shift of the calcaneus can compromise the outcome, as will a lack of recognition of the congenital subtleties such that a valgus hindfoot can have a varus orientation to the calcaneus, both leading to lateral overload. A pure medial slide of a calcaneus that has a varus orientation does not correct deformity, rather, it creates it. Thus, an axial calcaneal view must be studied carefully, for a varus orientation may be corrected via a closing wedge osteotomy commensurate with the medial shift of the tuberosity. As noted above, the flexor digitorum longus tendon transfer is the staple procedure to replace the damaged posterior tibial tendon. This transfer balances the eversion power of the peroneal tendons, works in phase with the former posterior tibial tendon in the stance phase of gait, and replaces a painful diseased posterior tibial tendon. However, over tensioning the transfer results in a tenodesis rather than a functional tendon transfer, the relative weakness of the FDL tendon (30% as strong as the PTT) creates difficulty with heel raise, and inappropriate transfer to distal tarsal bones may compromise the result by limiting torque from the transferred tendon. Preservation of the posterior tibial tendon in combination with the transferred FDL tendon remains a consideration without answer, though Rosenfeld (2005) suggests a substantial improvement in strength through PTT preservation. Failure of the above protocol for treating Stage 2 disease most often revolves around the insufficient corrective power of the tandem procedures in longstanding ruptures. According to Guyton (2001), only 50% of patients report a perception in deformity improvement following FDL/calcaneal osteotomy procedures, and only 4% report a significant improvement in pre-existing deformity. Sangeorzan (2001) found such patients could not achieve a painless plantigrade foot due to acquired ligament laxity (primarily the Spring Ligament). Sangeorzan applied Evans' pediatric procedure to adults without confirming the pathomechanics of correction. Some speculate the windlass effect on the plantar fascia creates correction (refuted by Horton, 1998, finding the plantar fascia is loosened by a lateral column lengthening), others believe tightening the peroneus longus through lateral column lengthening increases first ray plantarflexion, restoring the medial arch. Controversy also remains in answering Cooper's (1997) claim that lengthening through the calcaneus creates static increase in pressure about the calcaneocuboid joint (1.4mPa total) that may lead to an arthritic joint long term. Painful lateral overload following lateral column lengthening remains difficult problem to both prevent and correct. This last point leads to some focusing their efforts on restoration of the medial column. This group focuses on the “C” type deformity noted by Anderson, those with forefoot varus. It is known that the medial column is supported by the navicular, the cuneiforms, and the first, second, and third metatarsals. While a Cotton (opening wedge medial cuneiform) osteotomy, a first tarsometatarsal joint arthrodesis, or a metatarsal osteotomy has value, the surgeon must note that this only corrects the first ray. Complete correction of the medial column is best achieved through naviculocuneiform joint arthrodesis. Standing radiographs commonly reveal collapse at that level; however, surgeons are reticent to perform such fusions in light of the higher nonunion rate.


C. Saltzman

In developed nations Charcot arthropathy is most commonly caused by diabetes mellitus. Worldwide, leprosy remains the primary cause. All evidence points to a relationship between neurologic loss, continued loading activities and the development of unrecognized bone fragmentation. In type 2 diabetes, dysregulation of leptin biology causes bone loss and may be an important factor in precipitating Charcot events. Bone density studies show massive loss of bone in patients with ankle and hindfoot Charcot problems, but not midfoot problems. This suggests a different mechanism for collapse. Stable collapse with ulcer development in the midfoot can be treated with exostectomy. Realignment and fusion remain the mainstays of treatment for diabetic Charcot neuropathy, especially in the ankle and hindfoot. Bone mineralization deficiencies require special consideration of fixation techniques. Thin wire external fixation – either as primary fixation or to reinforce/neutralize other methods can be very helpful. Large bridging screws and carefully selected bridging plates are frequently also valuable to consider. Excessive immobilization periods (often double the normal amount of time) are generally required. The goal may be limited to a braceable, plantigrade foot.


D. Veale

Body Image is defined as our internalised sense of what we look like. For most of us, there is a relatively good match between what we think we look like and how we appear to other people. Body image can also be studied in terms of what you look like in the eyes of an observer and the pressures that occur to look a certain way. Body Dysmorphic Disorder (BDD) is the most extreme type of body image problem and consists of a preoccupation with one or more features that is not noticeable to others or the person's concern is markedly excessive. The preoccupation is associated with many time consuming rituals such as mirror gazing or constant comparing. It is associated with a poor quality of life, social isolation, depression and a high risk of committing suicide. Any part of the body may be involved but the foot is an uncommon focus for people with BDD. Such individuals often have needless dermatological treatment and cosmetic surgery. Body image problems and especially BDD is easily trivialised and stigmatised. People with BDD can benefit from cognitive behaviour therapy and certain types of medication.

Speaker

David Veale is Consultant Psychiatrist in Cognitive Behaviour Therapy at the South London and Maudsley Trust and The Priory Hospital North London and an Honorary Senior Lecturer at the Institute of Psychiatry, Kings College London. He runs a national specialist service for people with BDD and obsessive-compulsive disorder. He has published about 70 articles and co-authored five books including “Overcoming Body Image Problems (including Body Dysmorphic Disorder” published by Robinson and a treatment manual for BDD. He is a past President of The British Association of Behavioural and Cognitive Psychotherapies. His website is www.veale.co.uk


U. G. Longo

Achilles tendinopathy is a common cause of disability. Despite the economic and social relevance of the problem, the causes and mechanisms of Achilles tendinopathy remain unclear. Tendon vascularity, gastrocnemius-soleus dysfunction, age, gender, body weight and height, pes cavus, and lateral ankle instability are considered common intrinsic factors. The essence of Achilles tendinopathy is a failed healing response, with haphazard proliferation of tenocytes, some evidence of degeneration in tendon cells and disruption of collagen fibres, and subsequent increase in non-collagenous matrix. Tendinopathic tendons have an increased rate of matrix remodelling, leading to a mechanically less stable tendon which is more susceptible to damage. The diagnosis of Achilles tendinopathy is mainly based on a careful history and detailed clinical examination. The latter remains the best diagnostic tool. Over the past few years, various new therapeutic options have been proposed for the management of Achilles tendinopathy. Despite the morbidity associated with Achilles tendinopathy, many of the therapeutic options described and in common use are far from scientifically based. New minimally invasive techniques of stripping of neovessels from the Kager's triangle of the tendo Achillis have been described, and seem to allow faster recovery and accelerated return to sports, rather than open surgery. A genetic component has been implicated in tendinopathies of the Achilles tendon, but these studies are still at their infancy.


M. Solan A. Carne

Heel pain is very prevalent. Pain, especially after a period of rest, is the main symptom. Reduced ability to walk long distances and inability to participate in exercise and sport are other complaints. Plantar heel pain is most commonly caused by plantar fasciitis. Whilst only the recalcitrant cases reach secondary care, this can still be a significant workload. In the Royal Surrey County Hospital, Guildford, we see approximately 200 cases of recalcitrant heel pain each year. The vast majority of cases never come to hospital and are managed in primary care (1500/yr in podiatry alone). Effective primary treatments should reduce the number of long-term sufferers.

Recalcitrant cases of plantar fasciitis often have atypical symptoms. Radiological imaging is extremely useful in clarifying the diagnosis. Ultrasound is our preferred modality. There is a spectrum of pathology that affects the plantar fascia, and this is less well classified than for the achilles tendon, where the distinction between insertional tendinopathy and tendinopathy of the main body of the tendon is helpful in guiding treatment.

The evidence for many forms of treatment for plantar fasciitis is weak. Currently, the use of formal calf stretching programs is widely considered to be the best first-line treatment. There are additional benefits with stretches to the fascia itself. The mechanism by which these stretches help is not well established. Calf contracture is, however, associated with a variety of clinical problems in the foot and ankle. This is especially true for isolated gastrocnemius contracture. There is also laboratory evidence that increased plantar fascia strain is seen with increased calf muscle tension. Surgery to release a gastrocnemius contracture improves biomechanics and has been used in refractory cases of heel pain with good effect.

Radial extracorporeal shock wave lithotripsy is the latest version of this non-invasive treatment. Results in our centre are encouraging. For selected cases of atypical plantar fasciopathy injection treatments are effective.


J. Rees

Degenerative disorders of tendons present an enormous clinical challenge. They are extremely common, prone to recur and existing medical and surgical treatments are generally unsatisfactory.

Eccentric, but not concentric, exercises have been shown to be effective in managing tendinopathy of the Achilles tendon and of the mid-portion of the Achilles tendon in particular.

There has been much speculation on why eccentric exercises are effective. This talk will highlight the theories and evidence behind why eccentric exercises are effective. An understanding of why eccentric exercises are effective should inform best clinical practice on rehabilitation of tendinopathy. This talk will also discuss limitations of eccentric exercises and highlight areas where future research is needed.


R. Wallace

The best management for acute rupture of the Achilles tendon remains controversial. An unacceptably high re-rupture rate following conservative management has been quoted as a reason for surgical management, however, many of these studies do not stand up to critical scrutiny. Since 1989 I have personally treated over 1600 consecutive patients with acute rupture of the tendo-achilles using a conservative functional management protocol. This protocol was developed in the light of experience over a number of years. I will present an independent review of 1044 consecutive patients presenting to my tendo-achilles clinic between 1996 and 2008. After examination, 975 patients were found to have an acute tendon rupture, the rest being gastrocnemius muscle tears, painful Achilles tendonopathy or mis-referrals. Of these 975 patients 29 were late presenters in whom the tendon ends did not approximate well on plantar flexion. These patients were therefore treated surgically. One patient was too obese to be included in the standard protocol, although he was still treated conservatively. With a minimum follow up of two years, the overall re-rupture rate was 2.9%. The re-rupture rate using this management protocol is similar to or better than the published operative re-rupture rates. The protocol, complications and outcome will be discussed and I recommend a well defined and tested non operative functional management protocol for treatment of acute tendo-achilles rupture. This protocol is suitable for all ages including those with significant sporting demands. It is essential that patients have assessment and follow up carried out by a senior and experienced surgeon.


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U. G. Longo

Evidence-based orthopaedic surgery emphasizes the need to properly design and perform high-quality randomized controlled trials to minimize bias and to truly ensure the effectiveness of orthopaedic interventions. The currently available best evidence suggests to load and move the Achilles tendon after an open or percutaneous repair for an acute rupture.

Following repair of the torn AT, patients are immobilized with their ankle in gravity equines. They are encouraged to bear weight on the operated limb as soon as possible to full weightbearing, and discharged home on the day of the procedure. All patients are given an appointment for review 2 weeks postoperatively, when they receive a single cast change, with the ankle accommodated in a removable anterior splint in a plantigrade position, secured to the lower leg and foot with Velcro straps. Removal of the foot straps under supervision of a physiotherapist allowes the ankle to be plantar flexed fully but not dorsiflexed. These exercises are performed against manual resistance. At 6 weeks postoperatively, the anterior splint is removed, and the patient referred to physiotherapy for active mobilization.

At 12 weeks postoperatively, patients are assessed as to whether they are able to undertake more vigorous physiotherapy, and encouraged to gradually return to their normal activities. Progressive activities are incorporated as strength allowed, with the aim to return to unrestricted activities 6 months following surgery.


M. Jackson

Persistent pain is a common cause of disability in patients after fractures of the calcaneum. Amongst the possible causes for post traumatic pain is the development of degenerative osteoarthritis of the posterior facet of the subtalar joint. However there are many other causes of post-traumatic hindfoot pain which require consideration prior to treatment. Knowledge of the patho-anatomy of calcaneal fractures is required to reach an accurate diagnosis. Significant symptoms and disability may be treated by arthrodesis of the subtalar joint.

Post-traumatic arthritis in the non-operatively treated calcaneal fracture is however usually associated with deformity of the hindfoot, disordered hindfoot biomechanics, lateral wall fibular impingement and fibular tendon dysfunction.

Fractures treated by primary open reduction and fixation should be well aligned but despite anatomic reduction may also develop posterior facet arthritis. Symptoms may also be caused by prominence or impingement of the implant, particularly of locked perimeter plates on the lateral wall.

Patients therefore require careful assessment prior to surgery and any operative measures have to address these key features in order to produce a satisfactory clinical result.

This lecture will address the potential problems of this type of surgery and key features in the clinical assessment and imaging of these patients.

Subtalar arthrodesis in the presence of deformity is technically complex and requires careful planning in order to correct the deformity and to produce a well aligned hindfoot to allow corrected biomechanics without impingement and the fitment of suitable footwear.

The surgical techniques and different types of surgery required to adequately manage the posterior facet and deformity will be covered and will include arthroscopically assisted in-situ fusion, the safe approaches for open surgery and techniques to reconstruct the lateral wall, fibular tendon function and osteotomies required to restore calcaneal height and alignment.


HINDFOOT MALUNION Pages 17 - 17
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S. Haddad

Arthrodesis of both the ankle and the hindfoot has been discussed in the literature since the early part of the last century. Techniques have been modified substantially since these early discussions, though complications remain a frustrating element in patient management. Early procedures relied on molded plaster casts to hold fixation in corrected positions. Successful outcomes were hampered by loss of reduction in these casts and subsequent malunions. In addition, motion within these casts lead to a high rate of nonunion between the opposed bony surfaces. The era of internal fixation allowed compression across arthrodesis sites, enhancing union but creating a host of technical errors leading to unsatisfying results.

Malunion is also seen in post-traumatic situations. In particular, non-operative management of calcaneus fracture (or other hindfoot fractures) leads to not only arthritis of the involved joint surfaces, but malunion complicating successful fusion. Fusion in-situ leads to a high level of patient dissatisfaction, leading surgeons to challenging deformity correction while trying to achieve successful arthrodesis in compromised joints.

This lecture will focus on two types of malunion, one iatrogenic, one acquired. Revision triple arthrodesis (iatrogenic) can range from simple to challenging. A variety of studies document patient dissatisfaction following correction via this technique, ranging from Graves and Mann (1993) where the highest dissatisfaction rate was in highest in valgus malunion, to Sangeorzan and Hansen (1993), who found a 9% failure rate, most with varus malunion. The precarious balance required to create a plantigrade foot via triple arthrodesis with pre-existing deformity leaves even the most skilled surgeon challenged. As such, this component of the lecture will focus on recognition and correction of malunion based on a structured algorithmic approach we first presented in 1997. This algorithm is based on recognition of the apex of the deformity, and creating osteotomies to achieve balance.

We reviewed 28 patients who returned for follow-up examination who received treatment through this algorithm and found a statistically significant improvement in pre- and postoperative AOFAS ankle/hindfoot score, from an average of 31 points preoperatively to 59 postoperatively (p<0.01). All patients united, and all stated they would undergo the revision procedure again. Comparisons of pre- and postoperative shoe wear modification demonstrated a statistically significant improvement (p=0.01). Preoperatively, 20 patients required restrictive devices such as ankle foot orthoses and orthopaedic shoes. Postoperatively, only 1 patient required such a restrictive device. In fact, 17 patients required no modifications to their shoe wear at all.

The second component to this lecture will assess acquired hindfoot deformity, from malunion created by calcaneus fractures. A 2005 JBJS study by Brauer, et.al. found operative management resulted in a lower rate of subtalar arthrodesis with a shorter time off work compared to non-operative management. Removing the expense of time off work still netted a $2800 savings for operative management over non-operative management. Sanders echoed these thoughts in a JBJS 2006 paper, suggesting patients with displaced intra-articular calcaneal fractures may benefit from acute operative treatment given the difficulty encountered in restoring the calcaneal height and the talo-calcaneal relationship in symptomatic calcaneal fracture malunion. Thus, with these challenges in mind, the goal of this component of the lecture is to introduce methods to achieve balance and union with calcaneus fracture malunion. Vertically oriented multiplanar calcaneal osteotomy may assist the surgeon in avoiding the higher non-union rate associated with bone-block arthrodesis procedures. In this vein, the challenges associated with bone block subtalar arthrodesis will be explored.


C. Saltzman

Osteoarthritis (OA) is a disease of the joints stemming from a variety of factors, including joint injuries and abnormally high mechanical loading. Although the traditional treatment alternatives for end-stage OA are arthroplasty in the case of the hip and knee, and arthroplasty or arthrodesis in the case of the ankle, these options are not ideal for younger, more active patients. For these patients, joint prostheses would be expected to fail relatively quickly, and ankle fusion is not amenable to maintaining their active lifestyles. In these cases, joint distraction has attracted investigative attention as a conservative OA treatment for younger patients9-14.

Based on the principle that decreasing the mechanical load on cartilage stimulates its regeneration15, distraction treatment calls for reduced loading of the joint during a period of typically 3 months, during which time the load customarily passing through the joint is taken up by an external fixator spanning the joint . By mounting the fixator components to the bone on each side of the joint, and then lengthening the rods connecting the proximal and distal portions of the fixator, the joint is distracted. Assuming the fixation is appropriately stiff, any load passes through the fixator instead of the joint, and the two articular surfaces will not be allowed to contact each other under physiologic loading. The exact mechanisms leading to cartilage regeneration during distraction are not yet understood.

A possible negative consequence of joint fixation is cartilage degeneration due to immobilization during the treatment. It has been shown by Haapala et al. and others that long-term immobilization can be detrimental to articular cartilage16-18.

Conversely, joint motion during fixation (even passive motion) is thought to stimulate or encourage cartilage regeneration19-22. Toward this end, considerable effort has been invested in the application of hinges to external fixation for joints Joint motion has also been suggested as a potentially beneficial factor in distraction treatment, as well10. This is borne out by data from an RCT comparing the use of a rigid vs motion external fixator. Change in joint biology due to resorption of cysts may be responsible for reversal of symptoms.


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Charles Saltzman

Data is scant on the critical question of whether patients with endstage ankle arthritis are better served by a fusion or a replacement.

The STAR trial, a prospective case control study, comparing safety and efficacy of STAR ankle replacement at 24 months for 158 replacements and 66 fusions:

This FDA trial showed the STAR ankle replacement had better function, equivalent pain relief and a higher rate of complications and secondary procedures as ankles treated with fusion. A separate prospective cohort comparison of 200 ankle replacements vs. 94 ankle fusions performed by the collaborative consortium of Canadian Orthopaedic Foot and Ankle Surgeons (COFAS) suggests similar patient oriented outcomes at 24 months. Patients' self-assessment questionnaires do not show significant differences between the two groups.

The main medium/long-term concerns with ankle replacement remain component subsidence (especially talar subsidence) and polyethylene wear. Forces across the ankle are considerable, and the orientation of those forces to the underlying trabecular structure are a concern. Whether 2 or 3 part ankles will provide better bearing wear results remains unknown. With older designs, at 10 years the Swedish registry found approximately 60% survivorship. This registry has also shown better survivorship in patients with rheumatoid disease and with increased surgeon experience. More recent results related to the Hintegra and AES components show better midterm (5 year) revision rates in selected surgeons hands, than seen with older designs.

A large meta-analysis of ankle fusion and replacement published data by Haddad et al reported a mean nonunion rate of 10%. The main long-term concerns with ankle fusion are limitations of motion, and the development of premature arthritis in adjacent foot joints. In a study of an average of 9 year outcome of the Agility ankle replacement suggested that the incidence secondary arthritis is halved by replacement as compared to fusion.


Ian Winson

The diagnosis of Osteochondral Chondral Lesion of the talar dome is ever more regularly made. Though algorithms of management have emerged by recognising the position, size and the most reliable treatment options, the problem of the failed or relapsed case has only been considered in limited publications.

When considering the failed case a variety of possibilities have to be considered.

The characteristics of the patient have to be considered. The nature of the original presentation and the history of the present as opposed to the past compliant are worth noting. Patients who have no history of trauma do seem to have a different natural history and response to treatment. The young and the old may well respond differently.

Factors preventing recovery from surgery such as ongoing instability of the ankle or hindfoot deformity creating on going abnormal pressures on the joint surface should be looked for.

The possibility that the surgery undertreated or missed the full nature of the lesion has to be considered. The possibility of an untreated further pathology should be reviewed.

The severity of the original lesion and it's likely response to treatment should be considered. Larger cystic lesions would be more likely to have a poorer outcome. Ultimately if there are persistent symptoms and evidence of ongoing unresolved pathology on the joint surface alternative techniques to resurface the joint should be considered.


C. Saltzman

Ankle sprains in the athlete are one of the most common injuries, and syndesmosis type sprains seem to becoming diagnosed at an increasing rate. There still exists a paucity of information on optimal conservative and operative management.

Treatment

Because of the spectrum of injury, there is a spectrum of treatment.

if there is mortise widening, operative stabilization is required

if the mortise is normal, even with external rotation stress test positive, conservative treatment has been employed.

staged conservative regimen directed at reducing pain and swelling acutely, at regaining range of motion and strength subacutely, and then progressed to functional training and finally return to sport. The timeframe for these was in the range of 2 to 6 weeks without very specific progression criteria.

In the athlete, pain with rotational stress, greater severity of sprain, may treat operatively to stabilize the syndesmosis and aggressive rehab with earlier return to sport

Tightrope vs screw fixation vs both

Use of arthroscopy

Chronic sprains with recalcitrant pain and functional instability usually require operative treatment.

very poor evidence exists as to the timing or type of procedure. Arthroscopy is required to confirm the diagnosis, treat intraarticular problems, and provide fixation of the distal tibiofibular syndesmosis. The postoperative regimen used is generally the same as the one used when treating an acute syndesmosis disruption.

Tight rope vs Screw Fixation

clinical studies tightrope fixation has been acceptable and comparable to screw fixation

laboratory studies demonstrate comparable construct stability in the laboratory/cadaveric setting

indications for tightrope fixation are becoming more clear with more experience

my indications:

syndesmotic sprains with complete or incomplete disruption

fractures with syndesmotic disruption augment with screws, leave in place following screw removal


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S. Haddad

Deltoid ligament insufficiency has been shown to decrease tibiotalar contact area and increase peak pressures within the lateral ankle mortise. Sectioning of the deltoid ligament has been shown to decrease tibiotalar contact area by 43%. This detrimental effect may create an arthritic ankle joint if left unresolved. Reconstructive efforts thus far have been less than satisfactory. Pankovich and Shivaram described the deltoid ligament as having superficial and deep components based on insertion sites. The superficial layer originates from the anterior colliculus of the medial malleolus and inserts on the navicular, calcaneus and talus. The deep layer originates from the intercollicular groove and posterior colliculus and inserts on the talus. Boss and Hintermann noted that the most consistent and strongest bands of the deltoid were the tibiocalcaneal and posterior deep tibiotalar ligaments. Chronic deltoid ligament insufficiency may be seen in several disorders including trauma and sports injuries, posterior tibial tendon disorders, prior triple arthrodesis with valgus malunion, or total ankle arthroplasty with improper component positioning or pre-existing ligament laxity. The reconstruction of the deltoid ligament in these settings may be critical to the prevention of tibiotalar arthrosis or failure of ankle prostheses from edge loading and polyethylene wear.

The reconstructive technique we describe, under low torque, was able to restore eversion and external rotation stability to the talus, which was statistically similar to the native deltoid ligament. In addition, though we maximally tension this graft to give the most secure repair possible, we did not note any increased stiffness in the ankle joint through our measurement techniques. This unusual, positive secondary effect is different from that noted in studies of lateral ligament reconstruction, where ligament tensioning by all methods attempts to reproduce the native tension and not exceed it. All medial ankle ligament repairs of substance involve some type of tendon-weave (whether autograft or allograft) to achieve reconstruction. Our technique develops its strength not only from the anatomic orientation of the reconstructed ligament, but the strength of the components chosen to fix the tendon graft to the bone. The use of Endobuttons allows the entire graft to sit within the tunnels, without the potential violation of the graft ends achieved through techniques utilizing interference screw fixation. Tensioning the graft proximally through the tibia against a rigid distal construct allows greater tension to be placed on the graft at the deltoid ligament site itself than techniques which employ distal tensioning while holding the ankle into inversion. Finally, the use of a looped graft proximally secured with a post that may be moved even further proximally at the surgeon's discretion creates superior tension to achieve medial column rigidity in grossly unstable situations. Thus, given the critical importance of the deltoid ligament and the relative paucity of repair/reconstruction options available, we believe this novel approach will assist the clinician in anatomically reconstructing this challenging condition.

Deltoid ligament reconstruction technique using semitendinosis allograft, with superimposed line drawing demonstrating orientation of looped graft.


C. Saltzman

Clubfoot deformity is the most common congenital musculoskeletal disorder (1). Approximately one in one thousand people are born with at least one clubfoot; between 150,000 and 200,000 babies are born with a clubfoot each year (2). Eighty percent of these cases occur in developing countries, and the majority is left untreated. When infants are treated with a non-invasive casting technique pioneered by Ignacio Ponseti M.D., they generally can be “cured” with relative ease. In the United States, 97% of patients given this treatment can walk successfully and are able to live normal lives (3). The Ponseti Method requires several plaster casts but either no or minimal surgery, can be taught fairly easily not only to doctors but also to healthcare workers, nurses, and other people who have some knowledge and training in healthcare. Also, it requires plaster casting, making it an inexpensive treatment.

Dr. Ignacio Ponseti first performed his non-invasive treatment in 1949, but didn't publish his results until 1963. Two more papers, published in 1979 and 1995 described the long-term outcomes of treatment. In 1996 Oxford Press published a book detailing his approach. Although the treatment has always had high success rates, a lack of publicity prevented it from becoming more widely used until the late 1990s.

Its basic mechanism consists of a series of plaster casts and manipulations that gradually reshape the foot around a fixed talus to obtain correction. Generally, between five and seven casts are required. The casts extend from the toes to the upper thigh and hold the knees at a right angle. One of the most important aspects of this method is timing: infants can be given treatment starting at seven days old and ideally should begin treatment before reaching eight months of age.

Brazil, Uganda, Malawi and Chile now have official national programs, which are sponsored by each country's Ministries of Health, in which clinics in each country treat clubfoot disorder using the Ponseti Method. China set up a national program in 2005, but with a population of 1.3 billion people, it will take several years to complete the training. The prevalence of the Ponseti Method varies in the sixty other countries with healthcare workers trained in the treatment.

This talk will review the principles of treatment and focus on results of recurrence after initial treatment with the Ponseti Method.


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C. Saltzman

Technique, inducations, complications and early outcomes with posterior ankle and subtalar arthroscopy

A. ANKLE ARTHROSCOPY: Tips and Pearls on Avoiding Complications

a. Introduction

i. understanding of the anatomy of the foot and ankle is critical to safe performance of arthroscopic procedures and prevention of complications

ii. understanding of the surface and intra-articular anatomy of the ankle/subtalaar region is essential

iii. topographical anatomy serves as a guide to the successful placement of arthroscopic portals in the ankle

iv. neurovascular and tendinous structures are most at risk

b. Indications for Posterior/Subtalar Arthroscopy

i. Posterior ankle/ST Impingement

ii. OLT Ankle (usually posteromedial)

iii. Assist operative reduction of calc or post mal fractures

iv. Arthrodesis ankle/ST or both

c. Portals

i. Know the anatomy, use blunt dissection, minimize re-entry

ii. Preoperative plan for access, pathology, visualization

d. Prone Position

a. Posteromedial

b. Posterolateral

c. Accessory posterolateral

e. Set-up/instrumentation

i. Positioning -

ii. posterior, prone

iii. Distraction- non-invasive vs invasive (trans-calcaneal thin wire)

iv. Equipment - general set-up/instruments

- scopes (4.0 for outside joint or fusions; 2.7 otherwise)

- irrigation/pump (run at lowest flow possible)

f. Tips on Avoiding Complications

i. Patient selection and education

ii. Careful preoperative planning, evaluation

iii. Know/respect your anatomy

iv. Meticulous portal placement/care

v. Limit operative time/distension/tissue damage

vi. Use mini C-arm to monitor

vii. Plan, plan and plan, if you are prepared, all will work out

viii. Rehabilitation protocol and follow up.


L. Mason H. Tanaka K. Hariharan

The aetiology of hallux valgus is well published and largely debated. Hypermobility at the TMTJ was initially described by Morton, but it was not till Lapidus that its association with hallux valgus was hypothesized. However, little has been published on the anatomy of the tarsometatarsal joint. Our aim was to determine whether there was an anatomical basis for the coronal hypermobility in hallux valgus.

Method

Anatomical dissection was completed on 42 feet from 23 bodies. Presence of hallux valgus was noted (displacement of sesamoids). Measurements and photographs were taken of the first tarsometatarsal joint and all differences noted.

Observations

The TMTJ articular morphology is variable. There were 3 separate subtypes identified of the metatarsal articular surface.


S. Hazarika S. Murray C. Gerrand

Aims

Malignant tumours of the foot and ankle are rare, but easily missed. NICE guidelines for bone and soft tissue tumours may be less appropriate for the foot and ankle than elsewhere. The purpose of this study was to identify the clinical features and treatment of malignant tumours arising in the foot and ankle to see if guidelines should be modified.

Patient and Methods

This was a retrospective review of patients presenting to the Bone and Soft Tissue Tumour Service with a suspected tumour of the foot or ankle. Between March 1998 and July 2009, 132 patients were identified from a prospectively collected database of patients reviewed at a weekly multidisciplinary meeting.


M.J. Oddy S. Konan J. Meswania G.W. Blunn R.T. Madhav

Medial Displacement Osteotomy (MDO) of the os calcis is used to correct the hind foot valgus in a flat foot deformity. Screw fixation is commonly used although contemporary locking plate systems are now available. This study tested the hypothesis that a 10mm MDO would support a higher load to failure with a locked step plate than with a single cannulated screw.

Materials and Methods

Eight pairs of embalmed cadaveric limbs harvested 10cm below the knee joint were axially loaded using a mechanical testing rig. Two pairs served as non-operated controls loaded to 4500N. The remaining limbs in pairs underwent a 10mm MDO of the os calcis and were stabilised with a locked step plate or a 7mm cannulated compression screw. One pair was loaded to 1600N (twice body weight) as a pilot study and the remaining 5 pairs were loaded to failure up to 4500N. The force-displacement curve and maximum force were correlated with observations of the mechanism of failure.

Results

In one pair of control limbs, failure occurred with fractures through both os calcis bones, whilst the other pair did not undergo mechanical failure to 4500N. In the pilot osteotomy, the plate did not fail whilst loss of fixation with the screw was observed below 1600N. For the remaining five pairs, the median (with 95% Confidence Intervals) of the maximum force under load to failure were 1778.81N (1099.39 – 2311.66) and 826.13N (287.52 – 1606.67) for the plate and screw respectively (Wilcoxon Signed Rank test p=0.043). In those with screw fixation loaded to 4500N, the tuberosity fragment consistently failed by rotation and angulation into varus.


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M.T. Williams A.P. Molloy D.J. Simmonds C.K. Butcher

1737 elective foot and ankle cases were prospectively audited from Dec 2005 to end June 2010. All cases were brought back to a specialist nurse dressing clinic between 10 and 17 days post op. Data was collected at the dressing clinic with a standardised proforma on the type of surgery, the state of the wound and any additional management required. Those patients with a pre-existing infection were excluded.

Of the 1737 cases 201 (11.6%) had a minor wound problems such as excessive post op bleeding into the dressings, suture problems, early removal of K wires, delayed wound healing and minor infection. 42 patients required antibiotics (2.4%) 8 patients had a deep wound infection (0.5%) requiring intravenous antibiotics and or further surgery.

There were 1185 forefoot procedures 36 of which developed an infection (3%), overall infections of the mid/hindfoot was 6 (1%).

Practice has changed as a result of the audit (reviewed annually). We have changed our closure techniques (reducing suture problems). For the past 2 years all of our elective foot and ankle patients now go to an ultra clean ward (Joint Replacement Unit) and we have shown a reduction in infection rates by over 50% since. Our infection rate before the JRU was 3.3% with 0.7% deep infection rate (818 procedures) and after the introduction of the JRU our infection rate has ped to 1.6% superficial and 0.3% deep infection p<.001.

This large series prospective study sets a benchmark for infection rates in elective foot and ankle surgery. It also highlights the benefit of a dedicated orthopaedic elective unit with rigorous infection control policy and the need to regularly review our results.


A. Roche S. Bennett B. Fischer A. Molloy

NHS governance demands that services provided are clinically effective and safe. In the current financial climate and threats over public sector spending cuts, services offered by health care providers should also be cost-effective and profitable. Surgical specialties are often perceived as expensive with high implant costs. The aim of this audit was to cost the profit margin for foot/ankle surgery and test the accuracy of coding data collected.

Materials and Methods

Theatre data between January-April 2010 was retrospectively reviewed. Equipment inventories, operation notes and radiographs were reviewed for implants used. Clinical coding data was analysed and coded separately by the surgeon for comparison. Theatre expenses were calculated and accuracy estimated. Tariff generated and patient expenses were calculated and a final profit margin revealed. Wilcoxon matched-pair testing compared hospital recorded and surgeon calculated data.

Results

95 cases were included (51 forefoot, 5 midfoot, 6 arthroscopy, 12 hindfoot, 21 other), 65 female and 30 male patients. Theatre inventories were correct in 11% of cases. Mean inventory costs recorded were £90 and following surgeon analysis, £319. Total actual inventory cost was £30,306.23 but £8548.58 was recorded (p<0.0001). OPCS codes were deemed correct in 43% and incorrect in 57% of cases. Operation profit margin, including theatre, ward and salary costs was recorded as £158,229 but corrected profit margin with d inventories and OPCS codes was £121,584 (p=0.001).


V. Sinclair J. Barrie

Hammer toe involves metatarsophalangeal joint (MTPJ) hyperextension and proximal interphalangeal joint (PIPJ) flexion. Surgery commonly involves excision arthroplasty or fusion of the PIPJ with MTPJ soft tissue release if necessary. Previous series record that MTPJ release was carried out “as required” but not how often release is necessary. Myerson and Shereff's (1989) cadaver study found release of the extensors, MTPJ capsule and collateral ligaments necessary for full hammertoe correction. Hossain (2002) found the clinical results of this procedure were no better than simple PIPJ fusion. We release the MTPJ if hyperextension persists after PIPJ correction and release the components sequentially. We studied how often and how extensive a release was required, and how this corelated with pre-operative assessment.

We reviewed the records of 164 patients who had hammer toe correction under one consultant surgeon. Patients with complex corrections were excluded. The severity of the pre-operative deformity was classified as type 1 (PIPJ and MTPJ correctable), 2 (PIPJ fixed, MTPJ correctable) or 3 (neither joint correctable). We recorded the extent of release required for each toe.

Results

Of 334 type 2 toes in 146 patients, 178 (53.3%) required no MTPJ release, 11 (3.3%) extensor tenotomy only, 15 (4.5%) extensor tenotomy and MTPJ dorsal capsulotomy and 130 (38.9%) extensor tenotomy, capsulotomy and collateral ligament release. Of 31 type 3 toes in 18 patients, one (3.2%) needed no release, 2 (6.5%) tenotomy, one (3.2%) capsulotomy and 27 (87.1%) complete release.

Discussion

Nearly 50% of toes needed MTP soft tissue release, partial in 8%. Pre-operative assessment was not very accurate in predicting the need for release. We have not yet correlated need for release with clinical outcome.


A. Kulkarni T. Soomro M. Siddique

TMTJ fusion is performed for arthritis or painful deformity. K-wire and trans-articular screws are usually used to stabilize the joints. We present our experience with LP for TMTJ fusion in first 100 joints.

Patients and methods

100 TMTJ in 74 patients were fused and stabilised with LP between January 2007 and December 2010. The indication was Lisfranc arthritis and hallux valgus. Iliac crest bone autograft was used in 64 joints. Auto graft was used in 22/53 first TMT fusions. All patients post-operatively had below knee plaster immobilization and protected weight bearing walking for first 6 weeks. Clinical and radiological surveillance continued until bone. AOFAS midfoot scale was used as outcome measure.

Results

There were 18 male and 56 female patients with average age of 51 (14 -68). AOFAS midfoot scale improved 42% for pain, 30% for function and 53% for alignment. Average AOFAS overall score improved from 30 pre-op to 67 post op.

95 joints had clinical and radiological fusion. 1 patient needed removal of metalwork and 3 had delayed wound healing and 4 had radiological non- . All non- s were in 1st TMTJ where bone graft failed and were revised. None of the lesser ray TMTJ had non- . Average satisfaction score was 7 out of 10. 86% said they would recommend it to a friend and 91% would have it again.


G. Wansbrough R. Sharp P. Cooke

Juvenile Chronic Arthritis results in the early degeneration of multiple joints with severe pain and deformity. Treatment of ankle arthritis is complex and ankle replacement is indicated because of adjacent and distant joint involvement.

Materials and Methods

We reviewed 25 total ankle replacements in 13 young adults suffering the generalised consequences of Juvenile Chronic Arthritis (JCA) between 2000 and 2009. 12 had bilateral disease, 20 had anklylosis or prior fusion of the hind- or midfoot, and 16 had substantial fixed inversion of the hindfoot. All had previous prosthetic arthroplasty of between 1 and 15 joints. Surgery comprised corrective triple fusion where required, with staged total ankle arthroplasty at an interval of 3 or more months.

Results

All patients reported significant reduction in pain, and increased mobility with increased stride length, however severe co-morbidity limited the usefulness of routine outcome scores. No ankles have required revision to date.

We noted that the dimensions of the distal tibia and talus are markedly reduced in patients with JCA, and as a result of this and bone fragility, the malleoli were vulnerable to fracture or resection. JCA is also associated with cervical spondilitis and instability, micrognathia, temporomandibula arthritis and crico-arytenoid arthritis, resulting in challenging anaesthesia.


E.C.J. Dawe T. Ball S. Annamalai J. Davis

Minimally Invasive foot surgery remains controversial

Potential benefits include a reduced incidence of wound complications, faster return to employment and normal footwear. There are no studies published regarding the results of minimally invasive dorsal cheilectomy.

Patients and Methods

Thirty eight patients with painful grade I hallux rigidus underwent dorsal cheilectomy between April 2006 and June 2010. Minimally invasive cheilectomy (MIC) was introduced in August 2009. AOFAS scores, satisfaction, return to normal shoes and employment were assessed.


D. Russell A. Pillai K. Anderson C.S. Kumar

Regional anaesthetic for foot surgery has been discussed as a method of post operative analgesia. Ankle block as the sole anaesthetic for foot surgery has not been extensively reviewed in the literature.

Aim

To describe our experience of forefoot surgery under ankle block.

Methods

71 consecutive forefoot procedures (65 patients) were carried out under ankle block. A mixture of 10ml 2% Lidocaine with 10ml 0.5 % Bupivacine was administered to the superficial peroneal, deep peroneal, sural and saphenous nerves. Ankle tourniquet was employed in all procedures. Patients were contacted post operatively and completed a standardised questionnaire including an incremented pain assessment ranging from 0-10 (0 no pain, 10 severe pain).


A.A. Qureshi T. Ibrahim W. Rennie A.J. Furlong

Aim

To determine the effects of knee and ankle position on tendo Achilles (TA) gap distance in patients with acute rupture using ultrasound.

Methods

Twenty seven patients with twenty-eight acute complete TA ruptures confirmed on ultrasound were recruited within a week of injury. The mean age at presentation was 42 years (range 23-80 years). Ultrasound measurements included location of the rupture and the gap distance between the superficial tendon edges with the ankle in neutral and knee extended. The gap distance was sequentially measured with the foot in maximum equinus and 0°, 30°, 60° and 90° of knee flexion.


C.T. Hasselman

Introduction

The literature remains controversial on treatment of advanced stages of first metatarsophalangeal (MTP) arthritis and frequently favors arthrodesis. However, complications and suboptimal outcomes in active patients still remain with fusion of the first MTP joint. This study reports results of patients who underwent metallic resurfacing of the metatarsal side of the MTP joint.

Materials and Methods

Twenty seven patients (31 implants) with stage II or III hallux rigidus underwent resurfacing with a fourth generation (screw fixation) contoured MTP implant and were willing to participate in a follow up study comparing pre- and postoperative radiographs, range of motion, AOFAS and SF-36 scores. The average age of these patients was 51 years (range 35-74) and the average follow up was 54 months (range 45-66).


S.N. Maripuri A. Kotecha P. Brahmabhat K. Kanakaraj Y. Nathdwarawala

Introduction

Freiberg's infarction poses a challenge to foot and ankle surgeons. Several surgical and non surgical treatment methods are described. We performed a dorsal closing wedge osteotomy, debridement and microfracture of the metatarsal head. Dorsal closing wedge osteotomy helps in bringing the smooth plantar articular surface of the metatarsal head to articulate with the phalangeal articular cartilage whilst offloading the damaged dorsal articular cartilage. Debridement and Microfracture of the metatarsal head helps in regeneration of the damaged cartilaage via subchondral stem cells.

Materials and Methods

Total of 15 patients (12F, 3M) underwent the above surgery between year 2002 and 2008. Mean age was 35yrs (range14-60). All of them had an extraarticular dorsal closing wedge osteotomy fixed with a single screw along with debridement of the joint and mocrofracture of the damaged cartilage. Post operatively heel weight bearing was allowed with a special shoe for 6 weeks. Serial radiological assessments were done to assess healing of the osteotomy and reshaping of metatarsal head. Patients had a mean follow up of 2.5 yrs (Range 1-6). All patients were assessed using subjective patient satisfaction scores (scale 0-10) and AOFAS scores.


R. Walker D. Redfern

Introduction

We describe our experience with a minimally invasive Chevron and Akin (MICA) technique for hallux valgus correction. This technique adheres to the same principles as open surgical correction but is performed using a specialized high-speed cutting burr under image intensifier guidance via tiny skin portals.

Methods

All patients undergoing minimally invasive hallux valgus correction between November 2009 and April 2010 were included in this study and were subject to prospective clinical and radiological review. Patients were scored using the Kitaoka score as well as radiological review and patient satisfaction survey. Surgery was performed under general anaesthetic and included distal soft tissue release, Chevron and Akin osteotomies, with the same indications as for open surgery. All osteotomies were internally fixed with cannulated compression screws.


R. Walker D. Redfern

In recent years the Weil osteotomy has become the dominant technique employed by most surgeons for distal metatarsal osteotomy. This is generally a reliable technique but problems with stiffness can frequently occur in the operated metatarso-phalangeal joints. We present our experience with a minimally invasive distal metatarsal extra-articular osteotomy technique. This technique utilises a high-speed burr via a tiny skin portal to perform a distal metatarsal extra-articular osteotomy under image intensifier guidance without the need for fixation.

A consecutive series of 55 osteomies in 21 patients were included in the study. All osteotomies were performed for metatarsalgia/restoration of metatarsal cascade. The mean age was 49 (38-78), and 20/21 were female. The senior author performed all surgery. All patients were allowed to weight bear immediately in a postoperative shoe and then an ordinary shoe from 4-6 week post-operatively. Mean follow-up was 8 months (4-13) and patients were assessed clinically and scored using the AOFAS scoring system and a subjective outcome score.

The mean AOFAS score improved significantly postoperatively. All patients were very satisfied/satisfied with the outcome. Two patients had minor superficial portal infections, which resolved with oral antibiotics. One patient reported irritating numbness and stiffness in toes (1st case performed). Most patients reported swelling persisting to 3-4 months. There was one symptomatic delayed at 4 months treated successfully with short air boot immobilisation. There were no mal unions.

This series suggests that MIS distal metatarsal osteotomy results compare well with outcomes reported with modern open techniques such as the Weil. We now favour an MIS distal metatarsal osteotomy technique for most indications due to the minimal stiffness observed postoperatively as well as much reduced surgical time without the need for tourniquet.


R. Walker D. Redfern

Introduction

Chronic ruptures of the Achilles tendon pose a significant management challenge to the clinician. Numerous methods of surgical reconstruction have been described and are generally associated with a higher complication rate than with immediate repair. We report our results with a single 5cm incision technique to reconstruct chronic Achilles tendon ruptures with transfer of FHL. This simple technique also enables easy tensioning of the graft/reconstruction to match the uninjured leg and early mobilisation.

Materials & Methods

All patients undergoing late Achilles tendon reconstruction (over 4 months from rupture) during the period September 2006 to January 2010 were included in the study. All patients were treated using a single incision technique and posterior ankle FHL harvest with bio absorbable interference screw fixation in the calcaneum. Weight bearing was allowed from 2 weeks post operatively with a dynamic rehabilitation regime identical to that which we use following repair of acute ruptures. A retrospective review of the records was performed and a further telephone review undertaken.


A. Pillai M. Mullen Q. Fogg S. Kumar

Background

Talar neck fractures occur infrequently and are associated with high complication rates. Anatomical restoration of articular congruity is important. Adequate exposure and stable internal fixation of these fractures are challenging.

Aims

We investigate the use of an anterior extensile approach for exposure of these fractures and their fixation by screws introduced through the talo-navicular articulation. We also compare the quality and quantity of exposure of the talar neck obtained by this approach with the commonly described combined medial/lateral approaches.


L. Jeavons M. Butler M. Shyam S. Parsons

We report a single surgeon series of 33 arthroscopic subtalar fusions performed through a 2-portal sinus tarsi approach on 32 patients between March 2004 and February 2009. Background pathologies included primary arthrosis, post-traumatic arthritis, planovalgus foot, rheumatoid disease, sinus tarsi syndrome and CTEV.

97% [32/33] of fusions as assessed by both clinical and radiological means were achieved within 16 weeks [76% [25/33] within 12 weeks] with only a single outlier which had fused by 22 weeks. There were no deep infections, thrombotic events or neuromas. Five patients suffered complications of which four were successfully treated with a satisfactory outcome. One patient developed persistent pain and was eventually referred to another centre for further management.

In our experience arthroscopic subtalar fusion surgery has been demonstrated to give excellent outcomes with minimal complications. Furthermore, it is a technique allowing surgery even in patients with significant hindfoot deformity. It is a suitable operation even for patients with a compromised soft tissue envelope which would normally preclude an open procedure.


R.S. Kotwal V. Paringe N.K. Rath K. Lyons

Injury to the syndesmosis occurs in approximately 10% of all patients with ankle fractures. Anatomic restoration of the syndesmosis is the only significant predictor of functional outcome. Several techniques of syndesmosis fixation are currently used such as cortical screws, bioabsorbable screws and more recently introduced suture-button fixation. No single technique has been shown to be superior to the others.

The objective of this research project is to investigate whether treatment with a tightrope (suture-button fixation) gives superior results than the use of a cortical screw in the treatment of acute syndesmotic ankle injuries with regards to function, pain, satisfaction and return to normal activities.

Research Ethics Committee approval was obtained. 40 patients with syndesmotic ankle injuries associated with diastasis were prospectively recruited, 20 in each group. Patients were randomized to one of the 2 groups. At 12 weeks, American Orthopaedic Foot and Ankle Society (AOFAS) scores and a computerized tomography (CT) scan of both the ankles was obtained. At 1 year, AOFAS scores and satisfaction was assessed.

32 patients have been recruited so far, 20 in the tightrope group and 12 in the cortical screw group. Mean AOFAS scores at 3 months post-op were 90.67 in the Tightrope group and 84 in the screw group. The difference was not significant (p= 0.096). CT scans revealed that the quality of syndesmosis reduction was equally good with both the techniques. Metalwork prominence was common with both the devices.

Discussion and Conclusion

Both the devices achieved good reduction of the syndesmosis. Our CT scan protocol has insignificant radiation risk and allows more accurate assessment of the syndesmosis. Early clinical results do not show a significant difference in the functional outcome with the use of either device. Long-term (1 year) follow-up has been planned.


J. Dawson I. Boller H. Doll G. Lavis

The patient-reported Manchester-Oxford Foot Questionnaire (MOXFQ), with 3 dimensions (Walking/standing(W/S), Pain, Social interaction(SI)) has previously been validated in patients undergoing hallux valgus surgery. A preliminary cross-sectional evaluation of its measurement properties relating to surgery on different regions of the foot and ankle is presented here.

Within 4 weeks prior to foot or ankle surgery, 671of 764 consecutive eligible patients (87.8% response rate) were assessed with the: (i) MOXFQ questionnaire, (ii) SF-36 general health survey (iii) American Orthopaedic Foot & Ankle Society (AOFAS) scales. Sample characteristics: mean age 53 years 427 (63.6%) female. Patients were booked for (main) surgery on Hallux (210, 31.3%), Lesser Toes (119, 17.7%), Mid foot (22, 3.3%), Ankle/Hind foot (311, 46.3%) and whole foot/multiple regions (9, 1.3%)

MOXFQ item response rates were high (<2% missing on any one item) with responses generally well distributed across response categories. Item-total correlations within each dimension were generally above recommended levels. Internal consistency, as assessed by Cronbach's alpha, were 0.93, 0.84 and 0.71 for the W/S, Pain and SI dimensions, respectively. Within Hallux, Lesser toes and Ankle/hind foot surgical subgroups (low numbers precluded mid foot and whole/multiple region analyses), alphas for these subscales were similar. Convergent validity of MOXFQ was demonstrated by correlations between the 3 dimensions (W/S, Pain, SI) with similar dimensions of the SF-36 and relevant AOFAS scales. A priori hypotheses were generally supported.

The MOXFQ demonstrates good baseline measurement properties in patients undergoing a range of foot and ankle surgery, suggesting its suitability as an outcome measure for clinical trials of foot and ankle surgery in general. The SI dimension, concerned with cosmesis and social participation has somewhat weaker properties but remains useful. Evidence for the MOXFQ's responsiveness across the range of foot and ankle surgery is yet to be assessed.


C. Pearce J. Griffiths L. Matthews M. Forsbrey

Thromboembolic disease is associated with a high degree of morbidity and mortality. There is increasing pressure for elective orthopaedic patients, including those undergoing foot and ankle surgery, to be prescribed chemical thromboprophylaxis post-operatively in order to reduce the risk of a thromboembolic event. The risks of chemical thromboprophylaxis in terms of increased bleeding, wound problems and HIT are well documented. The aim of this study was to determine the incidence of clinically significant thromboembolic events in patients undergoing elective foot and ankle surgery with and without the use of aspirin.

We audited a consecutive series of 1625 patients undergoing elective foot and ankle surgery between 2003 and 2010. Between 2003 and 2006 inclusive, aspirin was used post operatively as chemical thromboprohylaxsis. Between 2007 and 2010, no chemical thromboprohylaxsis was used. The follow-up period for all patients was at least three months post-operatively. Most patients were reviewed at 3 months by the senior surgeon. Those who were reviewed less than 3 months (patients undergoing minor procedures) were contacted via telephone to confirm whether a thromboembolic event had been diagnosed.

There was no loss to follow up. Of the 1625 patients, 555 patients received aspirin and 1070 patients received no chemical thromboprohylaxsis. 5 of 1625 (0.31%) patients developed a clinically significant thromboembolic event. 3 patients developed a DVT at an average time of 5 weeks post operatively. 2 patients developed non-fatal PE at an average time of 7 weeks post operatively. 3 of the 5 thromboembolic events occurred in the aspirin group (all DVT's) whereas 2 of the 5 (all PE) developed in the non aspirin group.

The incidence of clinically significant thromboembolic events is low in elective orthopaedic foot and ankle surgery. We suggest that the benefit of chemical thromboprophylaxis does not outweigh its potential risks in foot and ankle surgery.


J. Mangwani D. Williamson T. Allan

Introduction

Major ankle and hindfoot surgery has traditionally been performed as an inpatient. Recent advances in minimally invasive surgery and improved post-operative pain management make it possible to contemplate performing major ankle and hindfoot operations as a day-case. This could have a significant impact on length of stay for these major cases, saving resources and in keeping with government policy.

In this study, we prospectively audited the outcome of the first cohort of patients undergoing major ankle and hindfoot surgery as a day-case against a series of standards.

Methods

Twenty four consecutive patients who underwent ankle or hindfoot surgery between August 2009 and April 2010 were considered for day surgery. Seven patients were deemed not suitable due to co-existing medical conditions or insufficient help at home. This left 17 patients who had ankle or hindfoot surgery as a day case. All patients received an ultrasound-guided regional nerve block and spinal or general anaesthesia. The data was collected on patient demographics, diagnosis, and type of surgical procedure. Patients received the standard follow-up regimen for a particular procedure. Patient satisfaction was assessed using a standard questionnaire which included self-monitoring of post-operative pain at 6, 24 and 48 hrs. In addition, any adverse outcomes were recorded.


C. Walker G. Aashish M. Bhatia

Introduction/Aim

Thromboembolism is a significant cause of patient morbidity and mortality, the risk of which increases in orthopaedic patients with lower limb immobilisation. It was therefore, our aim to identify a difference in symptomatic thromboembolism by treating acute Achilles tendon rupture patients with conventional non- weight bearing plaster versus functional weight bearing mobilisation.

Methodology

The notes of 91 consecutive patients with acute Achilles tendon rupture were reviewed. The patients' demographics, treatment modality (non- weight bearing plaster versus weight bearing boot), and predisposing risk factors were analysed. From the 91 patients, 50 patients with acute Achilles tendon rupture were treated conservatively in a non- weight bearing immobilisation cast. From these 50 patients, 3 then underwent surgery and were therefore excluded from the results. 41 patients were treated with functional weight bearing mobilisation. Patients who did have a symptomatic thromboembolic event had an ultrasound scan to confirm a deep vein thrombosis of the lower limb, or a CT-scan to confirm pulmonary embolism.


S. Sidharthan A. Jarvis

Lag screw fixation with plate osteosynthesis is the usual recommendation for oblique non-comminuted lateral malleolus fractures. Lag screw fixation may sometimes pose varying difficulties depending on the orientation of the fracture and in osteoporotic bones where the process may cause disintegration of the bone.

The purpose of this study was to evaluate whether additional lag screw fixation with plate osteosynthesis offered any advantage over plate only fixation in non-comminuted oblique fractures of the lateral malleolus. A simple method of fixation was employed where the fracture was reduced and held temporarily with a K wire. After fixation with plate the K wire was removed. A total of 20 patients who had non-comminuted unstable oblique fractures of their lateral malleolus that had been surgically fixed plate only fixation were retrospectively evaluated. The patients were aged between 17 and 70 yrs. Evaluation of the success of fixation, complications, resultant mobility and patient satisfaction was based on information gathered from X-ray findings and clinic notes. These results were compared to an agematched group of 20 consecutive patients treated with lag screw fixation and plate osteosynthesis. There was no significant difference in the rate of or functional outcomes in either groups. Lag screw fixation offers no additional advantage when combined with plate synthesis of non-comminuted oblique lateral malleolus fractures.


C. Senthil Kumar R. Miller A. Lomax S. Kapoor Q.A. Fogg

The arterial supply of the talus has been studied extensively in the past. These have been used to improve the understanding of the risk of avascular necrosis in traumatic injuries of the talus. There is, however, poor understanding of the intra-osseous arterial supply of the talus, important in scenarios such as osteochondral lesions of the dome. Previous studies have identified primary sources of arterial supply into the bone, but have not defined distribution of these sources to the subchondral regions.

This study aims to map the arterial supply to the surface of the talus. Cadaveric limbs (n=10) were dissected to identify source vessels for each talus. The talus and navicular were removed, together with the source vessels, en bloc. The source vessels were injected with latex and processed using a new, accelerated diaphanisation technique. This quickly rendered tissue transparent, allowing the injected vessels to be visualised. Each talus was then reconstructed using a digital microscribe, allowing a three dimensional virtual model of the bone to be assessed. The terminal points of each vessel were then mapped onto this model, allowing the distribution of each source vessel to be determined.

This study will provide quantifiable evidence of areas consistently restricted to single-vessel supply, and those consistently supplied by multiple vessels. These data may help to explain the distribution and mechanisms behind the development of the subchondral cysts of the talus.


C. Senthil Kumar R. Miller A. Lomax S. Kapoor Q.A. Fogg

There is a paucity of information on the arterial supply of the navicular, despite its anatomic neighbours, particularly the talus, being investigated extensively. The navicular is essential in maintaining the structural integrity of the medial and intermediate columns of the foot, and is known to be at risk of avascular necrosis. Despite this, there is poor understanding of the vascular supply available to the navicular, and of how this supply is distributed to the various surfaces of the bone.

This study aims to identify the key vessels that supply the navicular, and to map the arterial supply to each surface of the bone. Cadaveric limbs (n=10) were dissected to identify source vessels for each navicular. The talus and navicular were removed, together with the source vessels, en bloc. The source vessels were injected with latex and processed using a new, accelerated diaphanisation technique. This quickly rendered tissue transparent, allowing the injected vessels to be visualised. Each navicular was then reconstructed using a digital microscribe, allowing a three dimensional virtual model of the bone to be assessed. The terminal points of each vessel were then mapped onto this model, allowing the distribution of each source vessel to be determined.

This study will provide the as yet unpublished information on the arterial supply of the human navicular bone. The data will also give quantifiable evidence of any areas consistently restricted to single-vessel supply, and those consistently supplied by multiple vessels. This may help to explain the propensity of this bone to develop disorders such as osteochondritis, avascular necrosis and stress fractures which often have a vascular aetiology.


S. Chaudhry H. Prem

Painful peroneal spastic flatfeet without coalition or other known etiologies in adolescence, remains a difficult condition to treat. We present eight such cases with radiological and surgical evidence of bony abnormalities in the lateral subtalar region just anterior to the posterior facet.

All patients had presented as tertiary referrals with recalcitrant pain and had undergone a trial of orthotics and physiotherapy. Diagnostic workup included a clinical and radiographic evaluation. Clinical examination consisted of gait examination, foot alignment, range of motion, torsional profile of the lower limbs and marking of symptomatic foci. All patients had standing weightbearing anteroposterior and lateral projections of the foot and ankle, CT and/or MRI scans of the foot. Coalitions and other known intra-articular pathologies like subtalar arthritis were ruled out. All patients had bilateral flatfeet but unilateral peroneal spasm.

All patients had an accessory anterolateral talar facet (ATF) which was arising as an anterior and distal extension of the lateral process of the talus. This caused lateral impingement between the facet and the calcaneum, confirmed by bone edema around the sinus tarsi and marked at the apex of the angle of Gissane on MRI scans. All patients had stiff subtalar joints with very limited movement under anaesthesia, indicating peroneal muscle contracture. Patients were treated with a combination of facet excision, fractional peroneal and gastrosoleus lengthening and calcaneal lengthening to correct the flatfoot and prevent lateral impingement.


S. Dalal J.L. Barrie

Introduction

Many common fractures are inherently stable, will not displace and do not require plaster casting to achieve union in a good position. Nevertheless, many patients with stable fractures are advised that they need a cast, despite the potential for stiffness, skin problems and thromboembolism. Attempts to challenge this practice often meet the argument that patients prefer a cast for pain relief. We analysed five years of a single consultant's fracture clinic to see how many patients with stable foot and ankle fractures chose a cast after evidence-based counselling.

Materials and methods

All patients with stable fractures of the ankle or metatarsals seen between 1st June 2005 and 31st May 2010 were included. Displaced or potentially unstable ankle fractures, Jones fractures and fractures involving the Lisfranc joint were excluded. Patients were advised functional treatment but offered a cast if they wished. Patients were documented prospectively as part of a larger audit, including demographics, diagnosis and treatment in the emergency department and fracture clinic.


C. Heaver A. Sinha A. Marsh R. Shave

Background

Plantar fasciitis is a frequently chronic and disabling cause of foot pain in adults. This prospective study aims to evaluate the analgesic effect of ultrasound guided dry needling in patients with chronic plantar fasciitis, refractory to conservative treatment.

Method and Materials

Patients undergoing dry needling for plantar fasciitis, followed by perifascial injection between Jan ′09 and Feb ′10 were identified.

Pain scores were recorded on a visual analogue scale from 0 (no pain) to 10 (worst pain possible) before the procedure, 2 weeks and 6 weeks post procedure. Patients were also contacted in April to assess their current pain level.

Responses were graded as excellent (> 75% pain score improvement), good (50-74%), fair (25-49%) and poor (<25% relief).

Any complications or need for any further intervention were recorded.


C. Pearce J. Carmichael J. Calder

Introduction

The mainstay of treatment in non-insertional Achilles tendinopathy is non-operative, however between 1/4 and 1/3 of patients fail this. The main symptom is pain which appears to be related to new nerve endings that grow into the tendon with the neovessels from the paratenon. Treatments which strip the paratenon from the tendon are showing promise including formal paratenon stripping via Achilles tendinoscopy. The pain and swelling in Achilles tendinopathy is usually on the medial side leading to the postulation that the plantaris tendon may have a role to play.

Methods

We report a consecutive series of 11 patients who underwent Achilles tendinoscopy with stripping of the paratenon and division of the plantaris tendon, above the level of the tendinopathic changes in the Achilles. All patients had failed conservative treatment for at least 6 months and requested surgical intervention. The patients were scored with the SF-36, AOS and AOFAS hindfoot questionnaires pre-operatively and at a minimum of 2 years post operatively. They also recorded their level of satisfaction with the treatment at final follow up.


J. Ramaskandhan E. Lingard M. Siddique

Introduction

Peri prosthetic fracture is a recognised complication following Total ankle arthroplasty (TAA). There is limited literature on post operative management following TAA and controversies exist based on surgeon preferences. This project reports the incidence of peri- prosthetic fractures in patients managed with 2 different post-operative protocols.

Materials and Methods

Patients undergoing primary TAA with a diagnosis of Osteoarthritis (OA) or Post-traumatic Osteoarthritis (PTOA) were recruited into a randomized controlled trial. These patients did not require any additional procedures.

Patients were consented for the trial and randomized to one of two treatment groups (Early mobilisation after surgery vs. immobilisation in a plaster cast for 6 weeks post operatively). Plaster group patients underwent a graduated physiotherapy program from 6-12 weeks and early mobilisation group patients from 1-12 weeks. Complications any were recorded at 2, 4, 6 and 12 weeks post-operatively.


T. Fursdon S. Platt

Injuries to the lateral ligamentous complex of the ankle are common. The most commonly injured ligament is the anterior talofibular ligament (ATFL) followed by the calcaneofibular ligament (CFL). The posterior talofibular ligament (PTFL) is less commonly injured. There are few studies reporting the incidence of PTFL injury and less data available which describes the significance of this injury. We aim to establish an incidence of PTFL injury and allude to the possible significance of such an injury.

Methods

A retrospective review of patient notes and magnetic resonance (MR) scans dating from September 2007 to present day was undertaken. Patients complaining of acute or chronic ankle pain, swelling, and instability were included in the study. Exclusion criteria consisted of patients that had undergone previous surgery to the ankle. Routine MR was performed on all patients with oblique axial, coronal and sagittal views taken.

Results

312 patients were included in the study. The incidence of PTFL injury was 10.9%. The PTFL never ruptured in isolation. In 12.3% of patients the PTFL had ruptured with the ATFL and in 28.6% of patients it had ruptured with the CFL. Osteochondral defects were also present in the majority of patients with PTFL failure (57.1%).


A. Mahmood D.G. Shivarathre S.R. Platt M.S. Hennessy

Background

Cartilage lesions in chronic lateral ligament deficiency are common with the incidence rates mentioned in the previous literature up to 30%. However, other intra-articular pathologies in the unstable ankle have received little attention. Anterolateral impingement associated with synovitis and scarring is a less recognised feature in the treatment of chronic instability. The aim of our study was to ascertain the incidence of chondral and anterolateral impingement lesions in the symptomatic lateral ligament complex deficiency.

Methods

We performed a retrospective study of all consecutive patients who underwent modified Brostrom repair for symptomatic recurrent instability of the ankle. All patients underwent a MRI scan prior to surgery. Arthroscopy was performed in all the patients before lateral ligament reconstruction. Seventy seven patients with 78 ankles were included in the study. Patients who had previous ankle surgery or inflammatory arthropathy were excluded. Data was obtained from clinical and radiological records. Arthroscopic findings were recorded in detail during the surgery.


L. Parker P. Smitham I. McCarthy N. Garlick

Conventionally, medial malleolus fractures are treated surgically with anatomical reduction and internal fixation using screws. There seems to be no consensus, backed by scientific study on the optimal screw characteristics in the literature.

We retrospectively examined case notes and radiographs of 48 consecutive patients taken from our trauma database (21 male, 27 female) with an average age of 50 years (range 16-85) who had undergone medial malleolus fracture fixation with screws at the Royal Free Hospital, London between January 2009 and June 2010.

The most commonly used screw was the AO 4.0 mm diameter cancellous partially-threaded screw in 40, 45 and 50 mm lengths (40 mm n = 28, 45 mm n = 26, 50 mm n = 23) with the threads passing beyond the physeal scar in all cases. Incomplete reduction defined as > 1mm fracture displacement was observed on post-operative x-rays in 12 out of 48 cases (25%), all of which relied on partially-threaded screw fixation. In 5 cases where AO 4.0 mm diameter fully-threaded screws engaging the physeal scar had been used, no loss of reduction was observed.

This unusual, occasional use of fully-threaded screws prompted us to investigate further using a porcine model and adapted pedo-barographic transducer. We compared pressures generated within the fracture site using AO 4.0 mm partially-threaded cannulated screws, 4.0 mm partially-threaded cancellous screws and 4.0 mm fully-threaded cancellous screws.

Fully-threaded cancellous 4.0 mm diameter screws generated almost 3 times the compression of a partially-threaded cancellous screw with superior stability at the fracture. Partially-threaded screws quickly lost purchase, compression and stability particularly when they were cannulated. We also observed that screw thread purchase seemed enhanced in the physeal region.

We conclude that fully-threaded cancellous 4.0 mm AO screws are superior to longer partially-threaded screws and that use of cannulated 4.0 mm partially-threaded screws should be avoided in fixation of medial malleolus fractures.


V. Paringe Ni Vannet N. Ferran A. Gandour

ECSWT has been on the medical horizon for last 30 years mainly in urology for urolithiasis and has found a parallel use in orthopaedics for various chronic soft tissue conditions like Tendoachilles tendinoses and plantar fasciitis etc. ECSWT acts a piezoelectric device releasing acoustic energy and causing micro-trauma activating cytokine mediated response stimulating local angiogenesis and tissue repair.

Methodology

56 patients were recruited for the trial after ethics approval was achieved. The diagnosis was confirmed with ultrasound scan and measuring the width of the swelling and the local hypervascularity. The cohort of the patients was randomised in groups for physiotherapy [n=23] and shockwave therapy [n= 23]. The patient groups with shockwave therapy received a 3-week treatment with typical 2000 impulses per session once a week and physiotherapy group was subjected to eccentric loading exercises. Patients were assessed at 12 week with AOFAS, VISA-A scores and repeat ultrasound scan.

Results

The average age of the average age was 51 years [36- 73 years] Mean duration of symptoms prior to treatment was 25 months (range 6-60 months). AOFAS scores increased in both groups: from 64□86 in the ECSWT group and 72□79 in the physiotherapy group. VISA-A scores also increased in both groups from 39□73 in the ECSWT group and from 36□56 in the physiotherapy group. Scores were significantly higher in the ECWST group post treatment. The ultrasound scan findings suggested the tendon girth receding from 10.9 mm□9.9 mm in physiotherapy group while 9.8 mm□8.7 mm in the ECSWT group with hypervascularity decreasing from marked to mild in both groups. Statistical significance was established using SPSS 16 p < 0.001in post treatment group.


N. Morris F. Wadia M.R. Lovell

Introduction

Ottawa ankle rules originally described in 1992 have been shown to improve the pick-up rates of ankle fractures and avoid the need for unnecessary X-rays, thus minimising cost and radiation to the patient.

We decided to carry out an audit at our hospital to look at the pick-up rates of ankle fractures and ways to minimise x-rays for the patient both in A&E and in the orthopaedic department.

Methods

Ankle x-rays of 1088 trauma patients over a 7 month period from Dec 2009 to June 2010 (inclusive) were reviewed. Patients with ankle fractures were classified according to Weber type, and whether they were treated surgically or non-operatively. Non-operatively treated ankle fractures then formed the main sub-group of our study, looking at the number of follow-up X-rays and the amount of subsequent displacement. The amount of displacement was classified into non-displaced (0 mm), minimally displaced (<2mm) and displaced (>2 mm).


F. Lintz M. Millett T. Barton M. Adams

Background

The Plantaris Longus Tendon (PLT) may be implicated in Achilles (AT) tendinopathy. Different mechanical characteristics may be the cause. This study is designed to measure these.

Methods

Six PLT and six AT were harvested from frozen cadavers (aged 65-88). Samples were stretched to failure using a Minimat 2000(tm) (Rheometric Scientific Inc.). Force and elongation were recorded. Calculated tangent stiffness, failure stress and strain were obtained. Averaged mechanical properties were compared using paired, one-tailed t-tests.


P.D. Hamilton K. Hariharan A.H.N. Robinson

The incidence of venous thromboembolism (VTE) is unknown in elective foot and ankle surgery. In March 2010 we surveyed the current practice in VTE prophylaxis in elective foot and ankle surgery amongst members of the British Orthopaedic Foot and Ankle Society (BOFAS).

The response rate was 53%. The total the number of elective foot and ankle operations performed by the surveyed group was 33,500 per annum. The perceived incidence of DVT, PE and fatal PE was 0.6%, 0.1% and 0.02%. In our study the number of patients needed to treat to prevent a single fatal PE is 10,000 although this figure is open to significant bias.

The National Institute for Health and Clinical Excellence (NICE) recently published guidelines on reducing the risk of venous thromboembolism in surgical patients. These guidelines cover all surgical inpatients and uses data extrapolated from other groups of patients. We question the applicability of these guidelines to patients undergoing elective foot and ankle surgery. We consider that this data justifies the prospective study of the incidence of VTE in patients undergoing elective foot and ankle surgery, without the use of chemical thromboprophylaxis.


A. Malhotra P. Gallacher N. Makwana P. Laing S. Hill A. Bing

Background

Salvage procedures on the 1st MTPJ following failed arthroplasty, arthrodesis or hallux valgus surgery are difficult and complicated by bone loss. This results in shortened first ray and transfer metatarsalgia. We present our experience of using tri-cortical interposition grafts to manage this challenging problem.

Methods

Between 2002 and 2009 our department performed 21, 1st MTPJ arthrodeses using a tri-cortical iliac crest interposition graft. Surgical fixation was achieved with a compact foot plate. We performed a retrospective review from the medical notes and radiographs along with American Foot and Ankle scores which were collected prospectively.

We analysed the following parameters: time to radiological, requirement for further surgery, lengthening of 1st ray and any post operative complications.


T.A. Ball C.F. Taylor R. Gornall R. McCarthy R.B. Paisey J.R. Davis

Introduction

Uncontrolled deep sepsis in the diabetic foot often leads to below knee amputation (BKA). However, for deep sepsis in the forefoot, a transmetatarsal amputation can be curative while preserving the native ankle and hindfoot and allowing mobility without a prosthesis. We critically examined the outcome of transmetatarsal amputation in our diabetic patients with forefoot ulceration and proven osteomyelitis.

Materials and Methods

Data were collected prospectively at the multidisciplinary diabetic foot clinic. We recorded demographic details, duration of diabetes, comorbidities, nature of ulceration, radiological findings, Texas wound score and details of surgery. Patients were followed up regularly in the diabetes clinic. Medical records were reviewed and complications recorded.


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B. Rose L. Louette

Bipartite talus is a rare condition of uncertain aetiology, possibly congenital, with only six reported cases in the literature. Previously, these lesions have been successfully managed either conservatively, by excision of the posterior fragment, arthrodesis or one case by internal stabilisation using a postero-anterior screw which failed to lead to bony healing.

We report a series of four symptomatic cases of talus partitus in three patients, with a mean follow-up of 47 months (range 25-66 months). All patients had significant pain on presentation warranting surgical management. All three patients were male, with a mean age of 26 years (range 13-55 years) at surgery. Plain radiographs and computed tomography scans were obtained pre-operatively. All patients were reviewed at follow-up by an independent assessor.

The youngest patient presented aged 13 with a lesion without sub-talar arthrosis. He represented two years later with a similar lesion on the contralateral side. He was treated twice by internal fixation with two postero-anterior cannulated screws augmented with bone graft following preparation of the bone surfaces. The second patient presented with symptoms of isolated sub-talar osteoarthritis. He was treated with a sub-talar arthrodesis augmented with bone graft through a postero-lateral approach. The final patient presented late (age 55) with severe hind-foot osteoarthritis. His symptoms required treatment with tibio-talar-calcaneal fusion and a hind-foot nail. All patients reported a resolution of their symptoms post-operatively. Evidence of was seen radiographically in all cases.

We report the largest series to date of bipartite talus. All four cases were successfully treated surgically with three differing techniques, all of which utilised bone graft and internal fixation to achieve bony healing. We suggest treatment by a fusion of the talar fragments with associated limited fusion if the adjacent joints are markedly degenerate.


K. Tsang C. Fisher P. Mackenney A. Adedapo

Purpose

Tarsal Tunnel Syndrome (TTS) was first reported by Keck and Lam separately in 1962. It has been regarded as the lower limb equivalent to Carpal Tunnel Syndrome (CTS). The gold standard of diagnosis proposed over the years is nerve conduction study (NCS). In reality, TTS is much harder to diagnose and treat compared to CTS. Signs and symptoms can be mimicked by other foot and ankle conditions. Our unit had not seen a single positive nerve conduction result of TTS in clinically suspicious cases. We have therefore audited our 10 year experience.

Methods and Results

This is a retrospective audit. Patient list retrieved from neurophysiology. 42 patients were identified. All were referred with a clinical suspicion of TTS. There was no single positive nerve conduction result showing tarsal tunnel compression. Of these, 27 case notes were retrieved (64%). The demographics are: A) age (23 to 78), B) 12 males, 15 females, and C) 12 involving left side, 4 right side and 11 bilateral. These studies were conducted according to national guidelines. There were 8 abnormal studies: 4 showing spinal radiculopathy, 3 showing higher peripheral neuropathy and 1 showing tibial nerve irritation following previous decompression. 4 cases were operated on. These are: 2 for removal of lumps, 1 for partial plantar fascia release, and 1 for redo-decompression. As for the rest: 16 had no change in the symptoms and were discharged, 6 were referred to other disciplines, 2 resolved spontaneously, 2 lost to follow up and 1 resolved after a total knee replacement.


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D.T. Loveday N.P.J. Geary

Introduction

Medial column insufficiency in patients with painful acquired flatfoot can be difficult to appreciate. The reverse Coleman block test (as described and published by Mr E Wood in 2009) is used in this study to predict medial column instability.

Methods

Patients who underwent a procedure for medial column insufficiency with use of the reverse Coleman block test pre-operatively were investigated. Weight bearing radiographs were used to determine the joints in the medial column contributing to the deformity and also to estimate the angle which the first ray must be depressed to re-establish hindfoot neutrality. The reverse Coleman block test corrects a mobile valgus heel to a neutral position by placing a block, of appropriate height, under the first metatarsal head. With the heel in neutral and the relative forefoot supination compensated the foot returns to a neutral anatomic position. Gender, age, complications and radiological outcomes were investigated.


D.T. Loveday R. Clifton A.H.N. Robinson

Introduction

Osteochondral defects of the talus are usually a consequence of trauma. They can cause chronic pain and serious disability. Various interventions, non-surgical and surgical, have been used for treating these defects. The objective of this Cochrane systematic review of randomised control trials is to determine the benefits and harms of the interventions used for treating osteochondral defects of the talus in adults.

Methods

We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register, the Cochrane Central Register of Controlled Trials, MEDLINE, MEDLINE In-Process, EMBASE, Current Controlled Trials, the WHO International Clinical Trials Registry Platform and reference lists of articles. Date of last search: December 2009. Eligible for inclusion were any randomised or quasi-randomised controlled clinical trials evaluating interventions for treating osteochondral defects of the talus in adults. Our primary outcomes included pain, ankle function, treatment failure (unresolved symptoms or reoperation) and health-related quality of life. Preference was given to validated, patient-reported outcome measures. Two review authors independently evaluated trials for inclusion and, for the included trial, independently assessed the risk of bias and extracted data.


K. Thomason J. Paton K. Trimble J.E. Metcalfe J. Marsden

Introduction

Shoes with a rocker sole are commonly prescribed following forefoot surgery to redistribute pressure towards the heel. By shifting the body weight backwards, does the rocker shoe adversely effect balance and so disturb normal muscle activity? This study investigated the effects of the Darco post-operative shoe, and the impact of a contralateral shoe raise, on forefoot pressure, posture and balance.

Materials and Methods

Fourteen healthy volunteers were investigated (age 36 ±10.8 yrs 11 females) either wearing (1) left Darco shoe and right standard shoe with/without a 5cm temporary shoe raise (Algeos Ltd) (2) two standard shoes. Postural sway was measured while standing with eyes open/closed and on/off a foam block. Dynamic balance was measured while stepping forwards/backwards and walking. Measurements of foot pressure (TECSKAN Inc USA), 3D body motion (Codamotion, UK) and surface electromyography of lower limb muscles were taken. Results were analysed using a repeated measures ANOVA.


J.D. Craik S. Rajagopalan J. Lloyd A. Sangar H.P. Taylor

Introduction

Syndesmosis injuries are significant injuries and require anatomical reduction. However, stabilisation of these injuries with syndesmosis screws carries specific complications and many surgeons advocate a second operation to remove the screw. Primary Tightrope suture fixation has been shown to be an effective treatment for syndesmotic injuries and avoids the need for a second operation.

Materials and Methods

A retrospective audit identified patients who were treated for syndesmosis injuries over a two year period. Theatre and clinic costs were obtained to compare the cost of syndesmosis fixation using diastasis screws with the estimated cost of primary syndesmosis fixation using a Tightrope suture.


H. Molvik P. Smitham N. Cullen D. Singh A. Goldberg

Introduction

Following recommendations in the NHS Plan, all Trusts in the UK now send copies of correspondence to patients as standard practice. It is not clear whether patients wish to receive such correspondence, nor whether this practices an additional workload on the NHS as patients seek clarification on the medical terminology used in their letters.

Methods

We surveyed 90 consecutive patients in three Consultant Foot & Ankle surgeons' new outpatient clinics at our institution. Sixty patients received a copy of the letter sent to their GP (standard practice) and 30 patients received a letter in plain English addressed to the patient and a copy was sent to the GP (new practice). Patients were sent a cover letter explaining the study a copy of their clinic note and also a questionnaire that asked details about their preferred methods of communication. In addition qualitative interviews with 4 GP Partners were carried out to harbour their opinions.


M. Hadi C. Walker R. Sheriff F. Attar G. Attar

Background & aim

There have been many operations described for the treatment of hallux valgus deformities and b ette done separately with variable success rates. Our aim is to radiologically assess the outcome following simultaneous osteotomies to the 1st and 5th metatarsals in symptomatic patients with splay foot. To our knowledge, this procedure has not been described in the literature yet.

Materials & method

9 symptomatic patients (12 feet) were included in the study. The pre-operative and post-operative X-rays were assessed and the hallux valgus angles, 1st and 2nd intermetatarsal angles, distal metatarsal articular angles (DMAA), 4th and 5th intermetatarsal angles, maximum widths of the 1st and 5th metatarsal heads and the maximum distance between 1st and 5th metatarsals were calculated. The improvement in the angles and distances post-operatively were then assessed for statistical significance using Non-parametric paired T tests.


A. Kulkarni J. Ramaskandhan F. Pagnamenta M. Siddique

Introduction

Ankle replacement is a major surgery with significant soft tissue dissection and bleeding. The skin quality is often poor in these patients due to age, edema, venous congestion, arteriopathy or previous procedures and soft tissue injury. The chances of wound infection increase with delayed wound healing. Absorbent non-adherent dressing (ABD) and VAC dressing applied in theatre after ankle replacement were assessed in a cohort of 147 patients with wound complications, pain, satisfaction and length of stay as outcome measures.

Patients and methods

71 consecutive patients were treated with ABD post-operatively after ankle replacement. The practice was then changed to VAC dressings for 76 consecutive patients. 44 patients had additional procedures performed with ankle replacement (11 from ABD group and 33 from VAC group). Retrospective analysis of prospectively collected data was performed. All patients had daily pain score, wound status, hospital stay, satisfaction and range of movement recorded.


S. Morgan J. Footee

Introduction

Second ray problems are common, especially chronic MTP joint dislocation, and intractable metatarsalgia caused by a relatively long second ray we describe a new extra-articular technique that allows considerable shortening

Patients

We retrospectively reviewed 19 patients who underwent this type of osteotomy between 2006 and 2008. Mean age at operation was 62 years (43-78). All patients were. The indications for the operation were either MTP joint dislocation, or metatarsalgia caused by a relatively long metatarsal. This in turn was usually due to length lost on the first ray. Functional outcome was evaluated using the Manchester-Oxford foot and ankle score (MOXF), which is a validated outcome measure, the score being from zero to 64. A low numerical score indicates a good outcome. It assesses three main domains, walking, pain and social interaction. Range of motion, patient satisfaction and complication rates were also recorded. All patients had AP and lateral weight bearing radiographs.


E. Bayley N. Duncan A. Taylor

Introduction

Comminuted mid-foot fractures are uncommon. Maintenance of the length and alignment of the medial column, with restoration of articular surface congruity, is associated with improved outcomes. Conventional surgery has utilised open or closed reduction with K-wire fixation, percutaneous techniques, ORIF, external fixation or a combination of these methods.

In 2003 temporary bridge plating of the medial column was described to reconstruct and stabilise the medial column. The added advantage of locking plates is the use of angle-stable fixation. We present our experience with temporary locking plates in complex mid-foot fractures.

Materials and methods

Prospective audit database of 12 patients over a 6 year period (2003-2009).

5 males 7 females mean age 41.9.

Mechanism of injury: 11 high-energy injuries (6 falls from height, 5 RTCs), 1 low energy injury. Fracture type: All involved the medial column - 12 fracture dislocations of the medial column.

4 concomitant injuries to the lateral column.

All underwent ORIF, realignment, and stabilisation with locking plates across the mid-foot.


M. Ciapryna S. Palmer J. Alvey

Background

Morton's Neuroma is a proximal neuralgia that affects the web spaces of the toes and is currently of unknown aetiology. Currently surgical excision is considered the gold standard treatment based on RCT and cohort studies. However patient derived outcomes have not previously been assessed. We addressed these aspects with our study.

Methods

The validadated patient derived Manchester Oxford Foot and Ankle Questionnaire (MOXFQ) was used to assess patient derived outcomes of surgery prospectively. The MOXFQ enables the generation of four scores, a combined global score as well as a pain, walking and social score. Participants were asked to fill out the 16 item questionnaire prior to surgery and were followed up after a minimum of 6 months. All participants were treated with neurectomy following clinical diagnosis.


J.R. Ramaskandhan E.A. Lingard M.S. Siddique

Introduction

This project reports differences in outcome measures after total ankle arthroplasty (TAA) for patients with Osteoarthritis (OA), Rheumatoid Arthritis (RA) and Post-traumatic Osteoarthritis (PTOA).

Materials and Methods

Patients who underwent TAA between March 2006 and May 2010 were included. Assessments including questionnaires (height, weight, Foot and Ankle Outcome Score, SF-36) and American Orthopaedic Foot and Ankle Score (AOFAS) were completed pre-operatively, 3, 6, and 12-months after surgery. Analyses of outcomes by diagnosis were adjusted for age, gender and BMI.


P. Smitham H. Molvik K. Smith J. Attard N. Cullen D. Singh A. Goldberg

Introduction

There are approximately 1.2 million patients using orthotics in the UK costing the NHS in excess of £100 million per annum. Despite this, there is little data available to determine efficacy and patient compliance. There have been a few reports on patient satisfaction, which indicate that between 13-50% of patients are dissatisfied with their orthotics. Our aim was to evaluate patient reported satisfaction with orthotics prescribed and to investigate the reasons behind patient dissatisfaction.

Methods

Seventy consecutive patients receiving foot orthoses at the Royal National Orthopaedic Hospital were retrospectively asked to complete a questionnaire and to bring their shoes and orthotics to research clinic. The inside width of the shoes and corresponding width of the orthotic were measured. A semi-structured interview was carried out on 10 patients, including those that were satisfied or unsatisfied, using qualitative research methods to identify issues that are important to patients.


M. Goss A.H. Sott

Background

There is a general assumption amongst many patients – and some Surgeons- that 1. Metatarsophalangeal Joint Arthrodesis “in neutral plantigrade position” will postoperatively restrict the choice of shoes and heels in particular.

To our knowledge no studies have been carried out to assess this further.

Methods

A review of a single Surgeon's series of 25 patients and Radiographs following neutral 1.MTPJ Arthrodesis after 14 – 38 months follow up to assess the type of shoe and height of heel comfortably worn.


J. Young A.H. Sott N. Robertson J. Hendry J. Jacob

Metatarsal fractures are extremely common injuries accounting for 10% of all fractures seen in our accident and emergency departments (3). The vast majority can be treated conservatively. There is no standardised treatment, but it is commahplace to immobilise the foot and ankle joint in a below-knee back-slab, full cast or functional brace for a period of up to 6 weeks, weight-bearing the patient as pain allows. This practice is time-consuming and expensive, not to mention debilitating, and carries a morbidity risk to the patient.

We describe a simple, effective and cheap treatment method for metatarsal fracture management using the functional forefoot-offloading shoe (FOS). This is clinically proven to offload pressure on the metatarsals and is commonly used in both elective forefoot surgery and in diabetic patients.

Between January and September 2009, we identified 57 patients attending our fracture clinic with new metatarsal fractures. 28 met our inclusion criteria.

All patients reported a significant improvement in their pain

At Injury – mean 8.21 out of 10 (range 4-10)

After FOS fitting - mean 2.92 out of 10 (range 0-6)

The forefoot-offloading shoe is an excellent alternative to plaster casting or functional boot immobilisation, offering high patient satisfaction, an excellent outcome and a considerable cost-saving to the hospital trust.