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Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_X | Pages 92 - 92
1 Apr 2012
Mehta JS Hipp J Paul IB Shanbhag V Ahuja S
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Spinal Biomechanics Lab, Baylor College of Medicine, Houston, Texas, USA

Documenting the patterns and frequency of collapse in non-operatively managed spine fractures, using a motion analysis software.

Retrospective analysis of prospective case series

105 patients with thoracic or lumbar fractures, were neurologically intact, and treated non-operatively for the ‘stable’ injury at our unit between June 2003 and May 2006. The mean age of the cohort was 46.9 yrs

Serial radiographs (mean 4 radiographs/patient; range 2 – 9) were analysed using motion analysis software for collapse at the fracture site. We defined collapse as a reduction of anterior or posterior vertebral body height greater than 15% of the endplate AP width, or a change in the angle between the inferior and superior endplates > 5°.

The changes were assessed on serial radiographs performed at a mean of 5.6 mo (95% CI 4.1 – 7.1 mo) after the initial injury. 11% showed anterior collapse, 7.6% had posterior collapse, 14% had collapse apparent as vertebral body wedging, and 17% had any form of collapse. ODI scores were obtained in 35 patients at the time of the last available radiograph. There were no significant differences in ODI scores that could be associated with the presence of any form of collapse (p > 0.8 for anterior collapse; and p = 0.18 for posterior collapse).

This pilot study with the motion analysis software demonstrates that some fractures are more likely to collapse with time. We hope to carry this work forward by way of a prospective study with a control on other variables that are likely to affect the pattern and probability of post-fracture collapse, including age, bone density, vertebral level, activity level, fracture type.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_IX | Pages 39 - 39
1 Mar 2012
Shanbhag V Edwards G Veravalli K Davies A
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We report the clinical results of seven consecutive allograft knee ligament reconstructions using Achilles tendon prepared using a chemical treatment process. Results have been disappointing with six clinical failures at short durations of follow-up. All allografts are not the same and the method of tissue preparation may have important consequences for clinical outcomes.

Debate regarding the use of allograft or autograft tissue for knee ligament reconstruction continues. A variety of allograft tissues are available from commercial and NHS sources: fresh frozen, freeze dried, irradiated or chemically prepared. There are gaps in the literature with respect to clinical outcomes for these various methods of graft preparation. A recent systematic review indicated similar short-term clinical outcomes for fresh frozen allografts and autografts.

The senior author began using allograft Achilles tendon for revision ACL reconstruction or primary multiple ligament reconstruction in 2007. Tissues were obtained from a commercial supplier. These tissues had been harvested in Eastern Europe, transported to the USA and sterilised using a patented “Biocleanse” chemical treatment process. This involves sequential ultrasonic baths of detergent, peroxide and alcohol for fixed periods of time along with pressure and vacuum cycles.

Between April 2007 and April 2009, 7 allograft ligament reconstructions were performed in 5 knees. These comprised 5 ACL and 2 LCL reconstructions. At follow up of between 4 months and 2 years, clinical failure of 6 grafts has been observed. We are aware of one previous series of results for ACL reconstructions using chemically sterilised and irradiated allograft tissues. A 45% graft failure rate was reported. We have not been able to identify any clinical outcome studies for grafts prepared using the “Biocleanse” process.

Our results have prompted us to change to UK sourced, donor screened allografts, which are fresh frozen after decontamination with 70% ethanol.


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_III | Pages 419 - 419
1 Jul 2010
Kotwal RS Shanbhag V Forster M Robertson A
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Purpose of the study: We describe a new modified arthroscopic technique of surgically treating avulsion fractures of the tibial eminence using the Scorpion device (Arthrex, Naples, FL).

Methods and results: A 57 year-old female who sustained a type II fracture of the tibial spine was treated with arthroscopic fracture fixation using the Scorpion device to place a whip stitch into the substance of the anterior cruciate ligament (ACL). Tibial tunnels were made on the anteromedial aspect of the tibia using the Acufex ACL guide (Smith and Nephew, Mansfield, MA) and the sutures were passed through these tunnels and tied over a bony bridge. At 6 months after surgery, the patient was asymptomatic and had returned to her daily activities. She had regained full range of movement and had a clinically stable knee, confirmed on KT 2000 arthrometer. Radiographs showed anatomic reduction and fracture union.

Conclusion: The Scorpion device which is commonly used in arthroscopic shoulder surgery provides significant advantages as it can be used arthroscopically to place a whip stitch in the substance of the ACL. The hook at its end can be used to retrieve suture loop from the joint, thus reducing instrumentation and operating time. It is a user friendly arthroscopic technique that restores the necessary tension in the ACL, provides stable fracture fixation, and also results in a cosmetic end result.


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_III | Pages 415 - 415
1 Jul 2010
Shanbhag V Sarasin S Robertson A Forster M
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Purpose: Anterior cruciate ligament (ACL) reconstruction techniques have traditionally focused on reconstruction only of one bundle of the ACL providing good to excellent results in most cases. Biomechanical studies have shown increased anterior and rotational stability with double bundle(DB) compared to single bundle(SB) anterior cruciate ligament(ACL) reconstruction. A systematic review and meta-analysis was performed to compare double bundle and single bundle methods of anterior cruciate ligament reconstruction.

Methods and results: Medline (1966 onwards), EMBASE (1980 onwards) and the Cochrane database were searched retrieving 8465 possible articles, but only 5 studies fulfilled all the inclusion criteria. To be included, the study had to be prospective, randomised or quasi-randomised, comparing DB and SB grafts inserted using an arthroscopically assisted technique and have a minimum 18 month follow-up for all patients.

358 patients, 190 SB and 168 DB were considered for statistical analysis from these five papers. Outcome measures assessed included pivot shift testing, KT1000 arthrometer testing and IKDC knee scores. Using Review Manager 4.2 for statistical analysis; for dichotomous data, odds ratios and 95% confidence intervals were calculated and for continuous data, weighted mean difference and 95% confidence intervals were calculated.

Patients in the double bundle group were significantly less likely to have a positive pivot shift test (P< 0.0001). KT1000 arthrometer testing demonstrated greater antero-posterior stability with the DB group (P=0.002). There was no difference between the groups in terms of IKDC score.

Conclusion: The use of a double bundle technique improved both anteroposterior and rotational stability but not the clinical IKDC score suggesting that recovery of knee stability alone is not sufficient for achieving a better outcome.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 479 - 479
1 Aug 2008
Shanbhag V Ahuja S Jones A Davies P
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Anterior Lumbar Interbody Cages are used to recreate the lumbar lordosis in scoliosis surgery as anterior instrumentation is usually kyphogenic. We report two cases in which an anterior release was performed and interbody cages were used.In both these patients the cage was displaced anteriorly by an incorrectly positioned pedicle screw during posterior instrumentaion. In one case the cage was retrieved and correctly repositioned from the back using a TLIF approach, in the other this was noticed only post-operatively and patient needed another anterior surgery. We recommend a lateral Image Intensifier screening for combined anterior and posterior cases in which anterior cages are used in addition to posterior pedicle screws to prevent this complication.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 482 - 482
1 Aug 2008
Mehta JS Hipp J Fagan D Shanbhag V Jones A Howes J Davies P Ahuja S
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Objective: To assess the temporal geometric sagittal profile changes on serial radiographs of fractures of the thoracic and thoraco-lumbar spine.

Materials and methods: We have included 103 patients with thoracic or lumbar fractures were treated at our unit between June 2003 and May 2006. The patients were suitable for non-operative treatment. The mean age of the cohort was 46.9±2.4 (16–90). The sex distribution was equal. 94 patients had a single level lesion. 19 fractures were in the thoracic spine; 64 in the thoraco-lumbar (T11-L1) and 29 between L2 and L5. The radiographs were scored using the AO classification by 2 senior orthopaedic trainees. The radiographs were analysed at the Spine Research Laboratory. The results were computed using Stat, a statistical software.

Results: The changes were assessed over a mean period of 5.6 mo (range 1–49 mo; 95% CI 4.1–7.1 mo). Weighted kappa score of 0.58 was computed for the primary fracture type and 0.22 for the fracture sub-types. The inter-observer rater agreement was similar to that reported in literature. 7 patients showed a significant collapse. We report the association between the fracture types and the extent of collapse. We have also assessed the association between the medium to long term symptoms, the fracture types and the extent of collapse at the fracture sites and the adjacent disc.

Conclusion: Some fracture sub-types are more likely to collapse and cause long term symptoms. Identifying these fractures at the outset would help clarify surgical indications.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 458 - 459
1 Aug 2008
Shanbhag V Ghandour A Lyons K Jones A Howes J Ahuja S Davies P
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Introduction: Sacroiliac joint pathology can contribute to lowback pain and sciatica. Its frequency and significance is controversial.

Aims: The purpose of this study is to evaluate the incidence and clinical significance of positive SI joint pathology on MRI scans.

Methodology: 353 MRI reports and scans carried out over a one year period for backpain and sciatica were reviewed. Demographic data and clinical notes of patients who had positive SI joint pathology on MRI scans were analysed. Correlation between clinical suspicion of SI joint pathology and MRI findings was studied.

Results: 12 scans showed pathology in the SI joint, an overall incidence of 3.3%.8(66%) were males and 4(33%) females. Only 4(33%) of these patients had Plain Film abnormality. Average age of 41.2 years (33–54). One patient was known case of Ankylosing Spondylitis. Other positive pathology included oedema, sclerois and bridging osteophytes. Clinicians requested inclusion of SI joint in 43 patients. 8 of these were positive, an incidence of 18.6%. In 130 patients, the SI joints were imaged as routine. This yielded positive pathology in 4 patients (3%).

Conclusion: Our study concludes that 18.6% of patients who are suspected to have SI joint involvement clinically have positive pathology on MRI scans.

Routine inclusion of imaging of the SI joint as part of lumbosacral spine MRI for back pain and sciatica shows only 3% positive results.

SI joint should be imaged only if clinically suspected.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 480 - 480
1 Aug 2008
Shanbhag V Paul I Joshy S Jones A Howes J Davies P Ahuja S
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Aim: To assess if commonly used scoliosis instrumentation activates metal detectors at airport security gates.

Methods: 20 patientswho had travelled by air following scoliosis surgery were included. The type of instrumentation, number of journeys, body mass index and whether the alarm was triggered off by the airport security detector was recorded. We asked the patients opinion regarding provision of documentary evidence of surgery.

Results: 10 patients had posterior instrumentation, 5 patients -Paediatric ISOLA,4 patients had anterior instrumentation and one patient, anterior and posterior instrumentation. 12 patients (60%) had travelled more than four times by air following surgery corresponding to 48 passes through an airport archway detector.5 patients out of 20 had set off the alarm while passing through the metal detector everytime of which 4 had posterior instrumentation and 1 anterior instrumentation. None of the patients with ISOLA instrumentation set of the alarm. Two patients had set off the alarm every time they passed through the metal detector and both of them had posterior instrumentation. 14 patients(70%) suggested that we should provide documentary evidence of surgery to avoid delays in the airport security check. 25 % of patients set of the metal detector alarm following scoliosis instrumentation.

Conclusion: Patients with posterior instrumentation are more likely to set off the alarm compared to patients with ISOLA instrumentation. It is important to be aware that scoliosis instrumentation can activate airport archway detectors in our present security climate and to provide documentation to patients in order to avoid embarassment and delays.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 480 - 480
1 Aug 2008
Turner B Shanbhag V Jones A Howes J Davies P Ahuja S
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Introduction: Scoliosis Nursing service was introduced at the Cardiff Spinal Unit in 2003 as part of a multi-disciplinary team to improve quality of care for the patients and their families.

Background: This nurse is a point of contact at pre-admission and discharge. She co-ordinates the peri operative care and liases with other team-members including physiotherapists, occupational therapists and dieticians. Information regarding type of surgery, pain management, wounds/dressings, investigations is offered.

Aims and Objectives: To assess patients’ and families perception and satisfaction with the various aspects of care provided by the Scoliosis Nurse.

Methods and Materials: From 2005 to 2006, 30 consecutive patients and families who had seen the Scoliosis Nurse filled a questionnaire. 25 questionnaires were completed. Response was collated by an independent observer.

Results: All (100%) respondents felt that the presence of a nurse in clinic was beneficial. (100%) reported that they had received adequate information and literature. 66% of the patients felt a pre admission ward visit would be beneficial. 63% felt that further information about discharge and aftercare would be helpful.

Conclusion: Thus the Scoliosis Nurse was perceived to be beneficial by the patients and the family. Based on the abovefeedback the patient Information booklet has been updated.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 478 - 478
1 Aug 2008
Roberts D Shanbhag V Coakley M Jones A Davies P Howes J Ahuja S
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Paravertebral anaesthesia is a particularly effective, safe and reliable option in scoliosis patients undergoing anterior release in whom percutaneous epidural placement may be difficult to perform. A recent systematic review and meta-analysis of randomized trials has demonstrated that whilst paravertebral block and thoracic epidural insertion provide comparable pain relief after thoracic surgery, paravertebral block placement is associated with a better side effect profile, including a reduction in pulmonary complications, hypotension, nausea and vomiting and urinary retention. We describe a case of a 16 year old female patient who underwent staged correction of her thoracolumbar scoliosis. A paravertebral catheter was inserted under direct vision for continuous infusion post operative analgesia following the anterior release. 48 hours after surgery a swelling was noted in the groin, which was confirmed with ultrasonography as a fluid collection. The swelling resolved upon removing the paravertebral catheter. This suggests that it was caused by the local anaesthetic fluid tracking along the psoas muscle. Retroperitoneal infections, venous thrombosis, femoral hernia, femoral artery aneurysm and inguinal lymphadenopathy are other differentials. Ultrasonography was a fast and sensitive investigation to rule out these differentials and determined that fluid communicating with the abdominal cavity was the cause for this swelling. The infused local anaesthetic had tracked down into the femoral triangle and the swelling resolved upon cessation of the infusion.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 563 - 563
1 Aug 2008
Mehta JS Hipp J Paul IB Shanbhag V Jones A Howes J Davies PR Ahuja S
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Background: Thoraco-lumbar fractures without a neurological deficit are usually suitable for non-operative treatment. The main area of clinical interest is the deformity at the injured levels. The deformity may be evident at the time of presentation, though could be expected to progress in time.

Objective: Accurate assessment of the temporal behaviour in the geometry of the injured segments in non-operatively treated thoracolumbar fractures with normal neurology.

Materials: 102 patients with thoracolumbar fractures without a neurological deficit were treated non-operatively at our unit between June 2003 and May 2006. The mean age of our patient cohort was 46.9 yrs (16–90 yrs). Strict criteria were followed to determine suitability for non-operative treatment. Supine radiographs were performed at the initial assessment. Erect radiographs were performed when trunk control was achieved and at follow-up assessments thereafter.

Methods: Quality Motion Analysis (QMA) software (Medical Metrics Inc, Houston, Tx) was used to measure rotational and translation changes between the end plates using a validated protocol. The radiographs were standardised for magnification and superimposed from different time points. Transformation matrices were used to track the changes. The AO classification was used to classify the fractures by 2 independent observers.

Results: A median of 4 radiographs were analysed for each patient (range 2–9), at a mean follow-up of 5.6 mo (95% CI 4.1–7.1 mo). 92% of the cohort had sustained a 1 level injury. 76% of the injuries were between T12 and L2; 19% were in the thoracic spine. An inter-observer rating of 0.58 was obtained for the classification of the primary fracture type. The mean rotational change was −1.4855° ± 0.248° (95% CI: −0.994° to–1.976°). The mean anterior vertebral body height collapse was −4.3444° ± 0.6938 (95% CI: −2.695 to −5.724). The mean posterior vertebral height collapse was −0.7987 ± 0.259 (95% CI: −0.284 to −1.313).

Conclusions: We report the use of QMA software to track changes in the vertebral body geometry accurately. This has implications on the clinical aspects of management of thoracolumbar fractures based to progression of deformity that could be explored in future studies.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 480 - 480
1 Aug 2008
Shanbhag V Roberts D Turner B Jones A Howes J Davies P Ahuja S
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Background data: Previous studies have questioned the quality of information available on the internet. Internet research has proven to more prevalent among scoliosis patients as compared to other orthopaedic conditions.

Aim: Scoliosis websites identified by commonly used search engines were assessed for quality and medical accuracy.

Methods: The word scoliosis was entered into top six search engines and Websites ranked according to frequency. Five websites from the worldwide web and five from the UK only search were evaluated by medical professionals – 4 spinal consultants, 2 registrars, 3 nurses and 1 physiotherapist. 10 patients/carers who had scoliosis surgery also assessed these sites. A scale of 1 to 5 was used for ease of understanding, reliability, clinical correlation, adequacy and links and average score calculated.

Results: None of the top five UK websites figured in the top 5 WWW searchs. Scoliosis research society (SRS) and American Academy of Orthopaedic Surgeons (AAOS) website scored the highest by clinicians and patients in the www list. From the UK list, SAUK website scored the highest with both groups followed by Great Ormond Street Hospital (GOSH) website. We compared the assessment of websites by a healthcare professionals and by patients who had undergone treatment and showed no statistical difference in the scoring.

Conclusion: As treating clinicians it is necessary to educate patients by guiding them to reliable internet sites like SAUK and SRS.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 481 - 481
1 Aug 2008
Shanbhag V Gough J Khan S Jones A Howes J Davies P Ahuja S
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Background data: The Paediatric Isola system uses the philosophy of torsion-countertorsion force as a means of scoliosis correction. It aims to maintain this correction till such time that definitive fusion can be carried out.

Aim: This is a retrospective case series of our experience with the Paediatric Isola system and we evaluated the results of this system in the treatment of Scoliosis of various etiologies.

Methods: Twenty –one children,5 with neuromuscular,1 with Ehler-Danlos,5 with idiopathic,3 syndromic and 7 congenital treated with the Isola Instrumentation were studied.

Average age was 6.5 years(2–12). Average follow-up was 24 months (6m-36m).

Results: The average Cobb angle was 52° before surgery, 33.7° after surgery (64 % correction) and 32.5° (62.5% correction) at latest follow-up. The mean apical vertebral translation was 86% and 84% at post-op and latest follow-up. Stabilisation was most commonly perfomed from T2 to L4/L5. Three patients had implant complications, two had deep seated wound infections which necesssiated removal of implants in one case. Five of these patients have gone on to definitive fusions. Curve correction was best for primary thoracolumbar curves and lumbar curves. 2 patients with thoracic curves did not maintain correction.

Conclusion: The Paediatric Isola system is a safe and effective instrumentation in early management of a difficult and challenging sub group of scoliosis patients.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 447 - 447
1 Aug 2008
Manoj-Thomas A Shanbhag V Vafadis J Jones A Howes J Davies P Ahuja S
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Aim: To determine the incidence of adjacent level osteophytes in patients who have had anterior cervical fusion using an anterior cervical plate as compared to those who are fused without an anterior cervical plate.

Design: We retrospectively reviewed the lateral radiograms of sixty two patients who have had an anterior cervical fusion with a minimum follow up of twelve months.

Materials and methods: We looked for the development of adjacent level osteophytes in these patients at their final follow up, which was generally at the time radiological fusion. There were 27 patients in the first group who had an anterior cervical plate used to fix the vertebrae in addition to the Cervios cage, while the 35 patients in the second group in whom only a Rabea cage was used for the fusion. The mean follow-up was 20.6 months (range 12–48).

Results: 64.3% of the patients who had an anterior cervical plate developed adjacent level osteophytes while none of the patients who have had the fusion without the cage developed the osteophytes.

Conclusion: We found the patients who had an anterior cervical interbody fusion using a plate had a significant risk of developing adjacent level osteophytes while this is not seen in patients who do not have the plate for the fixation.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 448 - 448
1 Aug 2008
Lewis D Mukherjee A Shanbhag V Lyons K Jones A Howes J Davies PR Ahuja S
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Objective: To investigate the clinical outcomes, and the requirement of surgery following selective nerve root block performed for cervical radicular pain in patients with MRI proven disc pathology.

Methods: Thirty consecutive patients with cervical radiculopathy and correlating MRI pathology were studied. Mean age of patient was 46yrs (range 28–64yrs). Twenty nine of the thirty patients also complained of associated neck pain. All underwent fluoroscopically guided, selective cervical nerve root block with steroid (20mg Depomedrone) and local anaesthetic (0.5ml Bupivo-caine 0.25%). Radiographic contrast was used to confirm needle position. All procedures were conducted by the same clinician.

Pre and post procedure pain and physical function scores were noted using the standard SF 36 questionnaire, as well as whether subsequent surgery was required. Mean follow up time was seven months (range 2–13 months).

Results: 81% of patients reported an improvement in arm pain, and 66% in neck pain following the procedure. 77% of patients had an improvement in pain score (mean improvement 16 points). 68% of patients had an improvement in physical function score (mean improvement 20 points). At the time of follow up only one patient had undergone surgery for cervical radicular pain.

Conclusion: This study suggests that fluoroscopically guided selective nerve root block is a clinically effective interventional procedure in the management of cervical radicular pain, and may prevent the need for open surgery.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_II | Pages 304 - 305
1 Jul 2008
Gul A Shanbhag V Sambandam S
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Patients and Methods: We conducted a retrospective study of neck of femur fractures over a period of two years. Variables analysed were the perioperative haemoglobin levels, type of fracture and surgery, age, gender and blood transfusion in the perioperative period.

Results: Out of a total of 310 patients 49 required a postoperative blood transfusion.

The mean preoperative Hb of patients who required blood transfusion was 11; S.D. 1.49 while those who did not require a transfusion it was 12.5; S.D.1.42. Transfusion was required in 23% of patients having extra-capsular neck of femur fractures fixed with a DHS and in 9.5% of patients having intracapsular neck of femur fractures undergoing a hemiarthroplasty.

The univariate analysis showed a significant relationship between post-operative transfusion and the pre-operative Hb level (p=0.0001) and the type of fracture (p=0.001). However no relationship was found between transfusion and age (p=0.423) and the gender of the patient (p=0.611).

Discussion: The results of our study indicate that the most important factor in the prediction for blood transfusion in fracture neck of femur is the preoperative level of Hb as well as the type of fracture. Predicting a priori, the target population at a higher risk of requiring blood transfusion would enable us to establish appropriate prophylactic measures.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_II | Pages 307 - 308
1 Jul 2008
Kotwal R Shanbhag V Gaitonde A Singhal K
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Introduction: The incidence of tuberculosis has increased by almost 30% annually in the UK. Orthopaedic surgeons are more likely to encounter patients affected with Mycobacterium tuberculosis [MTB]. We have reviewed the surgical and medical management of cases of MTB infecting prosthetic hip joints in patients without previous tuberculosis.

Report: A 59 year old Caucasian woman presented to us with apparent osteoarthritis hip. X-rays confirmed osteoarthritis but also revealed a lytic lesion in the greater trochanter and erosion of the superior cortex of the femoral neck. The patient had no prior history of exposure to tuberculosis and no evidence of pulmonary or osteoarticular tuberculosis. The patient was investigated preoperatively with blood tests, bone scan, CT scan, CT guided FNAC, and core biopsy. None of these showed any specific diagnostic features. She underwent a total hip replacement and was asymptomatic up to 15 months post-op when she presented with pain in the joint with an abscess over the gluteal region. The abscess was drained and special media culture grew MTB. We used 4-drug therapy for 12 months with retention of the prosthesis and a good functional result.

Discussion: Infected total hip replacement presents a management challenge and surgeons should have a high index of suspicion for Tuberculosis in recalcitrant infections where smears from infected joints are negative. The infection of a total hip replacement with MTB in patients without previous tuberculosis is very uncommon. Only 12 cases have been reported in a search of English language literature from 1966–2005.

We have analysed the wide variation in the management of these cases. The majority of authors in our review resected or revised the infected prosthesis. We are of the opinion that if the infection is clinically under control and the prosthesis is stable, medical treatment alone should suffice.