Osteochondral lesions (OCLs) of the talus are a challenging and increasingly recognized problem in chronic ankle pain. Many novel techniques exist to attempt to treat this challenging entity. Difficulties associated with treating OCLs include lesion location, size, chronicity, and problems associated with potential graft harvest sites. Matrix associated stem cell transplantation (MAST) is one such treatment described for larger lesions >15mm2 or failed alternative therapies. This cohort study describes a medium-term review of the outcomes of talar lesions treated with MAST. A review of all patients treated with MAST by a single surgeon was conducted. Preoperative radiographs, MRIs and FAOS outcome questionnaire scores were conducted. Intraoperative classification was undertaken to correlate with imaging. Postoperative outcomes included FAOS scores, return to sport, revision surgery/failure of treatment and progression to arthritis/fusion surgery.Introduction
Methods
Despite considerable legacy issues, Girdlestone's Resection Arthroplasty (GRA) remains a valuable tool in the armoury of the arthroplasty surgeon. When reserved for massive lysis in the context of extensive medical comorbidities which preclude staged or significant surgical interventions, and / or the presence of pelvic discontinuity, GRA as a salvage procedure can have satisfactory outcomes. These outcomes include infection control, pain control and post-op function. We describe a case series of 13 cases of GRA and comment of the indications, peri, and post-operative outcomes. We reviewed all cases of GRA performed in our unit during an 8 year period, reviewing the demographics, indications, and information pertaining to previous surgeries, and post op outcome for each. Satisfaction was based on a binary summation (happy/unhappy) of the patients’ sentiments at the post-operative outpatient consultations. 13 cases were reviewed. They had a mean age of 75. The most common indication was PJI, with 10 cases having this indication. The other three cases were performed for avascular necrosis, pelvic osteonecrosis secondary to radiation therapy and end stage arthritis on a background of profound learning disability in a non-ambulatory patient. The average number of previous operations was 5 (1-10). All 13 patients were still alive post girdlestone. 7 (54%) were satisfied, 6 were not. 3 patients were diabetic. 5 patients developed a sinus tract following surgery. With sufficient pre-op patient education, early intensive physiotherapy, and timely orthotic input, we feel this procedure remains an important and underrated and even compassionate option in the context of massive lysis and / or the presence of pelvic discontinuity / refractory PJI. GRA should be considered not a marker of failure but as a definitive procedure that gives predictability to patients and surgeon in challenging situations.
A concern of metal on metal hip resurfacing arthroplasty is long term exposure to Cobalt (Co) and Chromium (CR) wear debris from the bearing. This study compares whole blood metal ion levels from patients drawn at one-year following Birmingham Hip Resurfacing (BHR) to levels taken at a minimum 10-year follow-up. A retrospective chart review was conducted to identify all patients who underwent a BHR for osteoarthritis with a minimum 10-year follow-up. Whole blood metal ion levels were drawn at final follow-up in June 2019. These results were compared to values from patients with one-year metal ion levels. Of the 211 patients who received a BHR, 71 patients (54 males and 17 females) had long term metal ion levels assessed (mean follow-up 12.7 +/− 1.4 years). The mean Co and Cr levels for patients with unilateral BHRs (43 males and 13 females) were 3.12 ± 6.31 ug/L and 2.62 ± 2.69 ug/L, respectively, and 2.78 ± 1.02 ug/L and 1.83 ± 0.65 ug/L for patients with bilateral BHRs (11 males and 4 females). Thirty-five patients (27 male and 8 female) had metal-ion levels tested at one-year postoperatively. The mean changes in Co and Cr levels were 2.29 ug/l (p = 0.0919) and 0.57 (p = 0.1612), respectively, at one year compared to long-term. These changes were not statistically significant. This study reveals that whole blood metal ion levels do not change significantly when comparing one-year and ten-year Co and Cr levels. These ion levels appear to reach a steady state at one year. Our results also suggest that regular metal-ion testing as per current Medicines and Healthcare products Regulatory Agency (MHRA) guidelines may be impractical for asymptomatic patients. Metal-ion levels, in and of themselves, may in fact possess little utility in determining the risk of failure and should be paired with radiographic and clinical findings to determine the need for revision.
Osteochondral lesions (OCLs) of the talus are a challenging and increasingly recognized problem in chronic ankle pain. Many novel techniques exist to attempt to treat this challenging entity. Difficulties associated with treating OCLs include lesion location, size, chronicity and problems associated with potential graft harvest sites. Matrix associated stem cell transplantation (MAST) is one such treatment described for larger lesions >15mm2 or failed alternative therapies. This cohort study describes a 5 year review of the outcomes of talar lesions treated with MAST. A review of all patients treated with MAST by a single surgeon was conducted. Pre-operative radiographs, MRIs and FAOS outcome questionnaire scores were conducted. Intraoperative classification was conducted to correlate with imaging. Post-operative outcomes included FAOS scores, return to sport, revision surgery/failure of treatment and progression to arthritis/fusion surgery. 32 patients were identified in this cohort. There were 10 females, 22 males, with an average age of 35. 01. 73% had returned and continued playing active sport. 23 patients underwent MAST in the setting of a failed previous operative attempt, with just 9 having MAST as a first option. 9 patients out of 32 had a further procedure. Two patients had a further treatment directed at their OCL. Two patients had a fusion, 2 had a cheilectomy at > 4 years for impingement, one had a debridement of their anterolateral gutter, one had debridement for arthrofibrosis, one patient had a re alignment calcaneal osteotomy with debridement of their posterior tibial tendon. MAST has demonstrated positive results in lesions which prove challenging to treat, even in a “failed microfracture” cohort.
Recent studies have shown that bone mineral distribution is more heterogeneous in bone tissue from an animal model of osteoporosis and osteoporotic human vertebral trabeculae. These tissue alterations may play a role in bone fragility seen in osteoporosis, albeit that they are not detectable by current diagnostic techniques (dual-energy X-ray absorptiometry, DXA). Type II Diabetes Mellitus (T2DM) also increases a patient's fracture risk beyond what can be explained or diagnosed by DXA, and is associated with impaired bone cell function, compromised collagen structure and reduced mechanical properties. However, it is not currently known whether osteoporosis or T2DM leads to an increased mineral heterogeneity in the femoral head of humans, a common osteoporotic fracture site. In this study, we examine bone microarchitecture, mineralisation and mechanical properties of trabecular bone from osteoarthritic, diabetic and osteoporotic patients. We report that while osteoporotic trabecular bone has significantly deteriorated mechanical properties and microarchitecture compared to the other groups, there is also a significant increase in mean mineral content. Moreover, the heterogeneity of the mineral content in osteoporotic bone is significantly higher than osteoarthritic (+35%) and diabetic (+13%) groups. We propose that the compromised architecture following bone loss at the onset of osteoporosis alters the mechanical environment, which initiates compensatory changes in mineral content. We show for the first time that trabecular bone mineralisation is significantly more heterogeneous (+20%) in T2DM compared to osteoarthritic controls. Interestingly, bone microarchitecture and mechanical properties are not significantly different between diabetic and osteoarthritic groups despite this increase in mineral heterogeneity.
The goal of surgery for osteochondral lesions is to regenerate the damaged cartilage with ideally hyaline cartilage. The current gold standard treatment is bone marrow stimulation (BMS) by microfracture. In reality however BMS typically results in the generation of fibrocartilage. Orthobiologics including bone marrow aspirate, platelet rich plasma and hyaluronic acid products have been shown to promote cartilage healing and potentially increase the formation of hyaline cartilage in treated lesions. However the role of these products, the timing of their administration and frequency of application are still not clearly defined and their routine use is still not recommended. These issues and future directions for research and future clinical application will be discussed.
Ischaemia reperfusion injury (IRI) is a very common metabolic insult in orthopaedics. It is often a subtle clinical event such as after brief tourniquet use, however severe injury, even multi-organ failure or death may result from prolonged tourniquet-use, crush injuries, vascular trauma or the release of compartment-syndrome. IRI is mediated by leukocyte infiltration and oxidatively-induced endothelial disruption. Antioxidants clearly attenuate or prevent this effect in animal models. That the antioxidant medications ascorbate and n-acetyl-cysteine attenuate IRI in the setting of elective knee arthroscopy.Introduction
Hypothesis
Nonagenarian patients with hip fractures present many challenges to the clinician, both in terms of their advanced age and medical co-morbidities with potential orthopaedic complications. Our aims were to assess outcome of hip fractures in a nonagenarian population with respect to pre-operative predictors of outcome, immediate and long-term morbidity, and survival rates. Nonagenarian patients with a hip fracture admitted between January 2000 and December 2003 were considered. Eighty-one patients were included, the majority being female (M: F 14: 67). Ages ranged from 90 to 98 years for female patients (mean 92.5 years, SD 2.2) compared to 90 to 95 years for male patients (mean 92.7 years, SD 2).Introduction
Methods
Compartment syndrome (CS) is a unique form of skeletal muscle ischaemia. N-acetyl cysteine (NAC) is an anti-oxidant in clinical use, with beneficial microcirculatory effects. Sprague-Dawley rats (n=6/group) were randomised into Control, CS and CS pre-treated with NAC (0.5g/kg i.p. 1 hr prior to induction) groups. In a post-treatment group NAC was administered upon muscle decompression. Cremasteric muscle was placed in a pressure chamber in which pressure was maintained at diastolic minus 10 mm Hg for 3 hours inducing CS, muscle was then returned to the abdominal cavity. At 24 hours and 7 days post-CS contractile function was assessed by electrical stimulation. Myeloperoxidase (MPO) activity was assessed at 24-hours. CS injury reduced twitch (50.4±7.7 vs 108.5±11.5, p<0.001; 28.1±5.5 vs. 154.7±14.1, p<0.01) and tetanic contraction (225.7±21.6 vs 455.3±23.3, p<0.001; 59.7±12.1 vs 362.9±37.2, p<0.01) compared with control at 24 hrs and 7 days respectively. NAC pre-treatment reduced CS injury at 24 hours, preserving twitch (134.3±10.4, p<0.01 vs CS) and tetanic (408.3±34.3, p<0.01 vs CS) contraction. NAC administration reduced neutrophil infiltration (MPO) at 24 hours (24.6±5.4 vs 24.6±5.4, p<0.01). NAC protection was maintained at 7 days, preserving twitch (118.2±22.9 vs 28.1±5.5, p<0.01) and tetanic contraction (256.3±37 vs 59.7±12.1, p<0.01). Administration of NAC at decompression also preserved muscle twitch (402.4±52; p<0.01 versus CS) and tetanic (402.4±52; p<0.01 versus CS) contraction, reducing neutrophil infiltration (24.6±5.4 units/g; p<0.01). These data demonstrate NAC provided effective protection to skeletal muscle from CS induced injury when given as a pre- or post-decompression treatment.
Hypothesis: That IRI can be attenuated using established antioxidant medications (ascorbate and n-acetyl-cysteine) in the controlled setting of elective knee arthroscopy.
Ankle intra-articular pathology after acute injury is common and often under-diagnosed. While the majority of soft tissue injuries improve with rehabilitation, up to 40% of patients experience chronic pain, stiffness or instability. MRI is increasingly used in the investigation of such patients; however interpretation of MRI findings requires specialist expertise. The aim of this study was to determine the diagnostic potential of magnetic resonance imaging (MRI) compared to ankle arthroscopy. Forty consecutive patients presenting with ankle pain of at least three months duration were included in the study. This cohort of patients underwent magnetic resonance imaging (MRI) and then arthroscopy. Pre-operative MRI reported findings were compared with the arthroscopic findings. The sensitivity, specificity, positive and negative predictive value of MRI for diagnosing ankle pathology was then assessed. The 2 senior authors reviewed the MRI scans and their findings correlated. The average time between injury and presentation to our service was 2.2 years. This interval ranged from 3 months to 10 years. 51% of patients gave history of inversion and/or plantar flexion injuries. 14 % had symptoms, which persisted following an ankle fracture. At arthroscopic evaluation 23 patients had osteochondral defects and 37 had evidence of synovitis. MRI identified 50% of the osteochondral defects with sensitivity 50% and specificity 100%. Synovitis was not identified in any of the patients on preoperative MRI but 33% of the preoperative MRI did demonstrate a joint effusion. Despite the high rate of discordance between MR imaging and arthroscopy in our study MRI still remains a useful adjunct in the investigation of ankle pain. The implications for practice and further study are discussed.
Ankle intra-articular pathology after acute injury is common and often under-diagnosed. While the majority of soft tissue injuries improve with rehabilitation, up to 40% of patients experience chronic pain, stiffness or instability. MRI is increasingly used in the investigation of such patients; however interpretation of MRI findings requires specialist expertise. The aim of this study was to determine the diagnostic potential of magnetic resonance imaging (MRI) compared to ankle arthroscopy. Forty consecutive patients presenting with ankle pain of at least three months duration were included in the study. This cohort of patients underwent magnetic resonance imaging (MRI) and then arthroscopy. Pre-operative MRI reported findings were compared with the arthroscopic findings. The sensitivity, specificity, positive and negative predictive value of MRI for diagnosing ankle pathology was then assessed. The 2 senior authors reviewed the MRI scans and their findings correlated. The average time between injury and presentation to our service was 2.2 years. This interval ranged from 3 months to 10 years. 51% of patients gave history of inversion and/or plantar flexion injuries. 14 % had symptoms, which persisted following an ankle fracture. At arthroscopic evaluation 23 patients had osteochondral defects and 37 had evidence of synovitis. MRI identified 50% of the osteochondral defects with sensitivity 50% and specificity 100%. Synovitis was not identified in any of the patients on preoperative MRI but 33% of the preoperative MRI did demonstrate a joint effusion. Despite the high rate of discordance between MR imaging and arthroscopy in our study MRI still remains a useful adjunct in the investigation of ankle pain. The implications for practice and further study are discussed.
Injection of the plantar fascia under general anaesthesia is a safe and effective method for the relief of conservatively unmanageable heel pain due to plantar fasciitis. A larger patient population and a greater than 1 year follow up would be helpful to determine the long term benefits &
outcomes of this treatment.
The purpose of this study was to analyse the twenty to twenty-five year outcomes of one hundred and ninetyfive cemented, matte finish, HD-2 THRs performed in one hundred and sixty-six patients with osteoarthritis of the hip by two surgeons. The one hundred and ninety-five THRs (one hundred and sixty-six patients) were followed prospectively by clinical assessment using the Harris Hip Score (HHS) and radiographic analysis. One hundred and forty-nine patients (90%) died with their implant still functioning or still had a successful implant at twenty to twenty-five years follow-up. Ten patients (6%) underwent a revision for aseptic loosening of the acetabular (n=2, 1.2%) or femoral (n=4, 2.4%) component, or both (n=4, 2.4%), that was related to wear-induced osteolysis. 7 (4.2%) patients (eight hips) were lost to follow-up. The mean HHS at the latest follow-up (twenty to twenty-five years) was 88±9. Radiographically, twenty-nine (85%) of the acetabular components were well fixed and four (12%) were probably or possibly loose. Two hips (6%) had probable or possible loosening of the femoral component. At twenty five years, the calculated cumulative survival rate (Kaplan-Meier method) revealed excellent results for revisions (83%±6, any cause) and aseptic loosening (86%±6, femoral component, 93%±3, acetabular component). The surviving patients had a good mean follow-up and radiographic fixation, proving the exceptional long-term success of this implant.
With the increasing availability of magnetic resonance imaging, there is potentially less emphasis being placed on making a definitive clinical diagnosis. Changes in the undergraduate curriculum have also reduced the emphasis on orthopaedic clinical evaluation. This aim of this study was to evaluate the predictability of clinical examination alone in comparison with arthroscopic findings in 50 consecutive patients presenting for arthroscopy to our service. Four trainees examined each patient; each examiner was blinded to the clinical diagnosis made by their colleagues. All patients were examined in the ward and subsequently underwent examination under anaesthesia and arthroscopy. Of the tests for meniscal injuries joint line tenderness was the most sensitive (77%) and specific (68%). Apley’s and McMurray’s test while specific (92%, 98%) lacked sensitivity (9%, 30%). Overall the tests for anterior cruciate ligament (ACL) disruption were more reliable than the tests for meniscal injuries. The anterior drawer and Lachmann tests had high specificity (90%, 75%) and sensitivity. The pivot shift test also had very high specificity (75%) and sensitivity (98%) for detecting ACL injuries. These data demonstrate that joint line tenderness is the most reliable sign of menis-cal injury. In the absence of joint line tenderness Apley &
McMurray’s tests have little role in routine clinical examination. Clinical tests and signs of ACL deficiency are consistently reliable in diagnosing ACL rupture.
As our population ages, the incidence of hip fractures per annum is increasing rapidly. Within this patient group are an increasing number of very elderly (over 90 years old). These patients present many challenges to the clinician, both in terms of medical co-morbidities and orthopaedic complications. While the mortality and morbidity of hip fractures in general are well recognised, this study looked exclusively at the outcome in these very elderly patients following admission. We reviewed 100 patients admitted between May 2000 and June 2002. The average age of our patient group was 92.5 years, 18% were male and 82% female. 60% were resident in nursing homes prior to admission, 26% lived with their families and 14% lived alone in the community. 56% of the fractures suffered were intertrochanteric, 40% were intra-capsular and 4% sub-trochanteric. Following admission, these patients waited on average 1.5 days before undergoing surgery, the predominant cause for pre-operative delay being maximisation of pre-operative medical condition. Median pre-operative ASA score was three. The method of anaesthesia used was spinal in 78% and general in 22%. 64% of the group underwent internal fixation and 34% had a hemiarthroplasty. Two patients were deemed unfit to ever undergo surgery. Following surgery, mean in-hospital stay was 9.3 days. There were 8 in-patient post-operative mortalities. Major post-operative morbidities occurred in 8% and included: 3 myocardial infarctions, 2 acute onset cardiac failure and 1 prosthetic dislocation. 11% of patients required a blood transfusion. 25% of the patients died within forty days of surgery, however, 50% of the patients were still alive 126 days post-op. Overall, the mean survival was 195 days. Post-discharge morbidity included two patients who had failure of internal fixation and 8 patients with severe immobility. We conclude that hip fracture surgery in the nonagenarian population is as well tolerated as surgery in younger patients. Careful pre-operative assessment and medical maximisation combined with prompt surgical intervention yielded a good outcome and return to pre-injury status for most patients.
It is now well established that operative repair of Tendo Achilles (TA) ruptures reduces re-rupture rate compared with conservative treatment. Operative repair has been reported to be associated with significant morbidity in 11–29% of cases, in particular wound related complications. In 1977 Ma and Griffith described a percutaneous repair of the TA, however initial results showed a disappointingly high re-ruputre rate of approximately 10%. The senior author has modified the technique initially described in attempt to reduce the re-rupture rate. After marking out the course of the sural nerve, a 2 Ethibond suture is passed into the ruptured tendon end via a stab incision, and passed proximally as in a modified Kessler suture. The suture is then passed first proximally and then back distally in a criss-cross pattern via further stab incisions and brought out at the tendon stump. A second suture is passed into the distal stump in a similar fashion and the sutures tied with the foot in equinus. We recruited a cohort of patients who had undergone percutaneous repair in the last 5 years, and a cohort of age and sex matched controls who had undergone open repair. Both groups of patients were managed postoperatively in equinus cast for 8 weeks. Subjective outcome was measured using the Foot and Ankle Outcome Score (FAOS). Statistical analysis was performed using the Mann-Whitney U-test for non-parametric data. Fifteen patients, mean age of 41.3, underwent percutaneous repair. There were 9 men and 6 women. The median time from injury to repair was 2 days in the percutaneous group and 1 day in the open group. Post-operatively there was no statistically significant difference between the two groups in relation to time taken to return to work (12 (percutaneous) versus 10 (open) weeks). However the percutaneous group returned to sport sooner 6 (percutaneous) versus 12 (open) months; p=0.6). There were no re-ruptures in either group. There were two sural nerve injuries in the percutaneous group and none in the open group. There was no significant difference in mean FAOS between the two groups (466 percutaneous versus 468 open). Percutaneous repair of TA ruptures results in a similar functional outcome as the traditional open repair. The increased incidence of sural nerve injury may be associated with the learning curve of the procedure as both of these cases were early in the series. We propose that percutaneous repair is safe and effective. The avoidance of a large skin incision may reduce wound related complications.
Introduction: Subject to recent literature citing a reduction in ankle range of motion predisposing to ankle fractures in children, we decided prospectively to analyse the passive range of motion in children presenting to our fracture clinic with simple distal radial metaphyseal fractures treated conservatively in cast. The range of motion was assessed by two observers, and measured using a goniometer in 80 patients. (42 radial fractures and 38 controls) The controls were recruited from children presenting with lower limb injuries and with no prior history of an upper limb injury or neuromuscular condition. The fractures were as a result of simple falls onto the outstretched hand with definite radiological and clinical findings. The range of motion in the contralateral limb was assessed. Both groups showed an equal distribution of dominant and non-dominant limbs. Results: Both groups were well matched with an average age of 10 and 10.3 years fracture group and control group respectively, and gender 55% male fracture group and 52.5% control group. The m injured group showed a passive range of motion of 1680, whereas the control group showed a higher range of motion of 1820, a difference of 140 (p<
. 005 student t-test). A third blinded independent observer of 20 children assessed Intra and interobserver error, and no observer was noted to have higher or lower readings. Conclusion: Children with radial fractures have a lower passive range of motion of their wrists than Controls. This may contribute to the aetiology of wrist fractures in a paediatric population. An possible explanation may be as cited in original work that children who sustain fractures have less mobility around their joints due to reduced elasticity in their musculoskeletal framework. Simple passive stretching of fracture prone joints should therefore be advised.
Matsen in 1975 described Compartment Syndrome (CS) as a condition in which the circulation and function of tissues within a closed space are compromised by increased pressure within that space. Raised intra-compartmental pressures result in progressive venous obstruction, capillary stagnation and microvascular hypoxia. N-acetyl cysteine (NAC) is an anti-oxidant used clinically to reduce liver injury following paracetamol overdose. NAC has been shown previously to reduce lung injury following exposure to endotoxin. Our aim was to evaluate the efficacy of n-acetyl cysteine in the prevention of CS induced acute muscle injury. Sprague-Dawley rats (n=6/group) were randomised into Control, CS and CS pre-treated with N-Acetyl Cysteine (0.5g/kg i.p. 1 hr prior to induction). Cremasteric muscle was isolated on its neuro-vascular pedicle and CS injury was induced by placing the muscle in a specially designed pressure chamber. Arterial blood pressure was measured via a cannula placed in the carotid artery. To induce compartment syndrome chamber pressure was maintained at diastolic-10 mm Hg. After three hours pressure was released stimulating surgical fasciotomy. One hour after decompression muscle function was assessed by electrical field stimulation: peak twitch (PTV) and maximum tetanus (MTV) values were recorded. Tissue oedema was assessed by wet to dry ratio (WDR). Compartment Syndrome (CS) resulted in a significant decrease in muscle function (PTV, MTV). CS also resulted in a significant increase in tissue oedema (WDR). Pre-Treatment with N-Acetyl Cysteine attenuated CS injury as assessed by these parameters. These data show that administration of the anti-oxidant N-Acetyl Cysteine results in significant attenuation of the muscle injury and oedema caused by Compartment Syndrome. This work was supported by a grant from the Cappagh Trust.
Following ischaemia-reperfusion (I-R) tissues undergo a neutrophil mediated oxidant injury. Vitamin C is a water-soluble endogenous anti-oxidant, which has been shown in previous studies to abrogate neutrophil mediated endothelial injury. Our aim was to evaluate Vitamin C supplementation in the prevention of I-R induced acute muscle injury. Sprague-Dawley rats (n-6/group) were randomised into control, I-R and I-R pretreated with Vitamin C (3.3g over 5 days). Cremasteric muscle was isolated on its neuro-vascular pedicle and I-R injury induced by clamping the pedicle for 3 hours, the tissue was subsequently reperfused for 60 minutes. Following reperfusion muscle function was assessed by electrical field stimulation: peak twitch (PTV), maximum tetanus (MTV) and fatigability values were recorded. Tissue neutrophil infiltration was assessed by tissue myeloperoxidase (MPO) activity and tissue oedema by wet:dry ratio (WDR). Ischaemia-reperfusion (I-R) resulted in a significant decrease in muscle function (PTV<
MTV) there was no difference in fatigability values between groups. I-R also resulted in a significant increase in neutrophil infiltration (MPO) and tissue oedema (WDR). Pre-treatment with Vitamin C attenuated I-R injury as assessed by these parameters. This data suggests that oral Vitamin C reduce I-R induced acute muscle injury, possibly by attenuating neutrophil mediated tissue injury.