Technical considerations in lateral extra-articular reconstruction coupled with anterior cruciate ligament reconstruction: A simulation study evaluating the influence of surgical parameters on control of knee stability.

BACKGROUND: Surgical parameters such as the selection of tibial and femoral attachment site, graft tension, and knee flexion angle at the time of fixation may influence the control of knee stability after lateral extra-articular reconstruction. This study aimed to determine how sensitive is the control of knee rotation and translation, during simulated pivot-shift scenarios, to these four surgery settings. METHODS: A computer model was used to simulate 625 lateral extra-articular reconstructions based upon five different variations of each of the following parameters: femoral and tibial attachment sites, knee flexion angle and graft tension at the time of fixation. For each simulated surgery, the lateral extra-articular reconstruction external rotation moment at the knee joint center was computed during simulated pivot-shift scenarios. The sensitivity of the control of knee rotation and translation to a given surgery setting was assessed by calculating the coefficient of variation of the lateral extra-articular reconstruction external rotation moment. FINDINGS: Graft tension had minimal influence on the control of knee rotation and translation with less than 2.4% of variation across the scenarios tested. Control of knee rotation and translation was the least affected by the femoral attachment site if the knee was close to full extension at the time of graft fixation. The choice of the tibial attachment site was crucial when the femoral fixation was proximal and posterior to the femoral epicondyle since 15 to 67% of variation was observed in the control of knee rotation and translation. INTERPRETATION: Femoral and tibial attachment sites as well as knee flexion angle at the time of fixation should be considered by surgeons when performing lateral extra-articular reconstruction. Variation in graft tension between the ranges 20-40 N has minimal influence on the control of knee rotation and translation.

Analgesia after ACL reconstruction: Hamstring donor-site injection versus intra-articular local anaesthetic injection.

BACKGROUND: The purpose of this study was to compare hamstring donor-site injection versus intra-articular injection of a local anaesthetic for analgesia after anterior cruciate ligament (ACL) reconstruction. HYPOTHESIS: The two methods provide similar pain relief. MATERIAL AND METHODS: 158 consecutive patients undergoing ACL hamstring tendon graft reconstruction (semi-tendinosus/gracilis [STG] or four-stranded semi-tendinosus [ST4]) during two periods in 2015 were included. Peripheral nerve block was not performed. At the end of surgery, 20mL of ropivacaine 7.5mg/mL was injected, intra-articularly during the early period (n=79) and into the hamstring donor site during the second period (n=79). Post-operative pain was evaluated subjectively by the patients using a visual analogue scale (VAS). We recorded patient demographics, concomitant surgical procedures, VAS pain scores, rescue analgesic use, time to discharge, and patient satisfaction. VAS pain score, side effects, and patient satisfaction were also recorded during a phone interview on the day after surgery (D1). RESULTS: Mean VAS pain scores were not significantly different between the two groups immediately after surgery (D0) or on D1 (D0: intra-articular, 2.08 and donor site, 1.88; Mann-Whitney P=0.6). Neither were the groups significantly different for rescue analgesic use, patient satisfaction, or quadriceps activation. CONCLUSION: The same local anaesthetic provides similar pain relief when injected intra-articularly or into the hamstring donor site after hamstring tendon ACL reconstruction (STG or ST4). LEVEL OF EVIDENCE: III, prospective case-control study.

Defining the role of intramedullary nailing for fractures of the distal radius: a systematic review.

This article is a systematic review of the published literature about the biomechanics, functional outcome and complications of intramedullary nailing of fractures of the distal radius. We searched the Medline and EMBASE databases and included all studies which reported the outcome of intramedullary (IM) nailing of fractures of the distal radius. Data about functional outcome, range of movement (ROM), strength and complications, were extracted. The studies included were appraised independently by both authors using a validated quality assessment scale for non-controlled studies and the CONSORT statement for randomised controlled trials (RCTs). The search strategy revealed 785 studies, of which 16 were included for full paper review. These included three biomechanical studies, eight case series and five randomised controlled trials (RCTs). The biomechanical studies concluded that IM nails were at least as strong as locking plates. The clinical studies reported that IM nailing gave a comparable ROM, functional outcome and grip strength to other fixation techniques. However, the mean complication rate of intramedullary nailing was 17.6% (0% to 50%). This is higher than the rates reported in contemporary studies for volar plating. It raises concerns about the role of intramedullary nailing, particularly when comparative studies have failed to show that it has any major advantage over other techniques. Further adequately powered RCTs comparing the technique to both volar plating and percutaneous wire fixation are needed.

Opening wedge distal femoral varus osteotomy for lateral compartment osteoarthritis in the valgus knee.

INTRODUCTION: Osteotomy aims to reduce pain and the rate of progression of arthritis by correcting deformity and offloading the affected compartment. This study reports the results of a case series of opening wedge distal femoral varus osteotomies for valgus lateral osteoarthritis of the knee. PATIENTS AND METHODS: Eighteen patients underwent osteotomy surgery (21 knees) with the aim of correcting the mechanical axis to 48-50% from medial to lateral. RESULTS: The mean follow-up for the study population was 4.5 years (range 1.6 to 9.2 years). Four patients underwent conversion to arthroplasty at a mean time of 3.3 years postosteotomy. Kaplan-Meier analysis demonstrates a cumulative survival of 79% at 5 years. In the remaining 17 osteotomies, all patients reported that outcome measures improved from baseline. However, only the IKDC and pain subdomain of KOOS showed a statistically significant and clinically relevant difference. Re-operation for non-arthroplasty related surgery was common. In part this was due to symptoms related to prominence of metalwork (10). Other reasons included non-union (1), loss of correction (2), infection (1), and persistent symptoms (2). CONCLUSION: Cumulative survival of opening wedge DFVO is comparable with that reported in closing wedge series. Clinically relevant differences in the IKDC and KOOS pain scores suggest that opening wedge DFVO is a useful option in the management of valgus gonarthrosis. However, DFVO is a technically demanding procedure and re-operation, particularly for removal of metalwork, is common.

Meniscal scaffolds: early experience and review of the literature.

INTRODUCTION: Meniscal scaffold implants support the in-growth of new "meniscus like" tissue with the aim of alleviating post-meniscectomy knee pain and preventing further articular cartilage degeneration. PATIENTS AND METHODS: Twenty-three patients underwent meniscal scaffold implantation (14 medial, 9 lateral) with either the Menaflex (ReGen Biologics) (n=12) or Actifit (Orteq) (n=11) scaffolds. Minimum follow-up was 1 year with a mean of 24.1 months (18-27) for the Menaflex and 14.7 months (12-18) for the Actifit groups. Mean age at surgery was 35 years (17-47) with a mean Outerbridge grade of 1.9 in the affected compartment. Eight (36%) underwent concurrent osteotomy, ligament reconstruction or microfracture of the tibial plateau. KOOS, Lysholm, Tegner activity and IKDC scores were collected pre-operatively and at six-month interval post-surgery. Assessment of the reconstruction was obtained with MRI scanning and arthroscopy. One scaffold tore and was revised at 19 months post-operatively. RESULTS: Twenty-one out of 23 (91.3%) had a significant improvement in knee scores when compared to pre-surgery levels at latest follow-up. Second-look arthroscopy in 14 at 1-year post-implantation showed variable amounts of regenerative tissue. There was no progression in chondral wear noted on repeat MRI scanning. CONCLUSION: Treatment with meniscal scaffold implants can provide good pain relief for the post-meniscectomy knee following partial meniscectomy. Longer follow-up is required to ascertain whether they also prevent the progressive chondral wear associated with a post-meniscectomy knee.

Absorbable or non-absorbable sutures? A prospective, randomised evaluation of aesthetic outcomes in patients undergoing elective day-case hand and wrist surgery.

INTRODUCTION: We prospectively evaluated aesthetic outcomes in a group of randomised patients who underwent elective day-case hand and wrist surgery using either absorbable or non-absorbable sutures. PATIENTS AND METHODS: A cohort of 100 adult patients were randomised using sealed envelopes to receive either absorbable or non-absorbable sutures for their wound closure. Clinical review was carried out at 6 weeks. A postal questionnaire was sent to all patients 3 months following surgery comprising a visual analogue scale (VAS) for wound satisfaction, a validated 6-point patient scar assessment tool and the shortened version of the disabilities of the arm, shoulder and hand questionnaire (QuickDASH). RESULTS: From the postal questionnaire, 70 responses were received. There was no statistically significant difference between the two groups in terms of VAS, patient scar assessment tool and quick DASH. CONCLUSIONS: For elective day-case hand and wrist surgery, either suture material can be used confidently with respect to overall aesthetic appearance in such patients.

The quality of Internet sites providing information relating to hip resurfacing.

OBJECTIVE: To establish the accuracy of information available on the Internet regarding hip resurfacing. METHOD: The top 100 sites found in response to the query 'hip resurfacing' using Google were assessed for quality using the DISCERN instrument and the JAMA benchmarks. RESULTS: Of the top 100 sites found, only 30 were relevant, available and unique. Of these only six (20%) scored highly for overall quality; however, ten (33%) sites achieved the lowest possible score. Risks and complications were not commonly presented nor were results of surgery. In one case, results presented were grossly misleading. CONCLUSIONS: The use of the Internet to directly market specific products to the public raises the concern that patients are not always fully informed. The quality of health information on the Internet relating to hip resurfacing is of frequently poor and variable quality. Eighty per cent of the sites that we assessed had serious shortcomings.

Retrospective analysis of the impact of symptom duration on prognosis in soft tissue sarcoma.

The objective was to assess whether time to diagnosis is influenced by patient/tumour-related factors and whether or not duration of symptoms has any impact on survival in soft tissue sarcoma. The study was an analysis of prospectively collected data for patients treated at our centre over a 20-year period. Risk factors were assessed by Kaplan-Meier analysis and the Cox proportional hazards model. Of 1,508 patients, 159 had metastatic disease at diagnosis and were excluded from analyses. In the remaining 1,349 patients overall 5-year survival was 60%. Duration of symptoms had a significant impact on survival (p=0.0037) with each additional week of symptoms reducing the monthly hazard rate by 0.2%. Patient and tumour-related factors significantly associated with longer symptom duration were low-grade, subcutaneous tumours, and epithelioid or synovial sarcoma. Symptom duration was not associated with age/gender or tumour size. Patients with long symptom durations tend to have low-grade disease and a more favourable outcome than patients who experience short symptom durations.