Abstract

Aims

Unicompartmental knee arthroplasty (UKA) has been successfully performed in the United States healthcare system on outpatients. Despite differences in healthcare structure and financial environment, we hypothesised that it would be feasible to replicate this success and perform UKA with safe day of surgery discharge within the NHS, in the United Kingdom. This has not been reported in any other United Kingdom centres.

Background

Best practice tariff (BPT) for hip fracture was introduced in April 2010, offering financial incentive to encourage trusts to implement best practice and improve quality of care. This equates to £1335. An early indicator of a patient's outcome is the time to operation from admission, with best practice targets of <36hours as a key marker of quality. As well as being detrimental to patient experience, delays in the time to operation have clear links to increased mortality rates.

Opening wedge high tibial osteotomy (OWHTO) is a treatment option for medial compartment osteoarthritis of the knee in the young active adult. Limited evidence exists in the literature regarding return to activities following OWHTO.

We performed a retrospective study of local patients who underwent OWHTO from 2005 – 2012 assessing post-operative return to sporting function. Patients with additional knee pathology, surgery or alternative issues affecting activity were excluded.

110 patients met inclusion criteria, 75 were successfully contacted.

Mean improvement in pain score = 4.8/10 (95%CI 4.2 to 5.4, p<0.01). Mean pre-operative KOS-SAS score = 0.5/2, mean post-operative KOS-SAS score = 1.1/2, mean change in KOS-SAS score following OWHTO = 0.6 (95% CI 0.5 to 0.7, p<0.01). Mean pre-morbid Tegner score = 5.9/10, pre-operative = 2.7/10, post-operative = 4.2/10. Mean change in Tegner score following OWHTO = 1.5 (95% CI 1 to 1.9, p<0.01). Following OWHTO 25% of patients achieved pre-morbid Tegner scores. Patient BMI, age, type of implant or graft used had no significant effect on outcome.

OWHTO can temporarily improve pain, activity and sporting levels in young patients with isolated medial compartment knee OA. Return to pre-morbid activity levels and even high level sports function is possible although not the norm.

Limited literature exists providing comprehensive assessment of complications following opening wedge high tibial osteotomy (OWHTO). We performed a retrospective study of local patients who underwent OWHTO for isolated medial compartment knee osteoarthritis from 1997–2013.

One hundred and fifteen patients met inclusion criteria. Mean follow-up = 8.4years. Mean age = 47 (range 32–62). Mean BMI = 29.1 (range 20.3–40.2). Implants used included Tomofix (72%), Puddu plate (21%) and Orthofix (7%) (no significant differences in age/ sex/ BMI). Wedge defects were filled with autologous graft (30%), Chronos (35%) or left empty (35%).

Five year survival rate (conversion to arthroplasty) = 80%. Overall complication rate = 31%. 25% of patients suffered 36 complications including minor wound infections (9.6%), major wound infections (3.5%), metalwork irritation necessitating plate removal (7%), non-union requiring revision (4.3%), vascular injury (1.7%), compartment syndrome (0.9%), and other minor complications (4%). No thromboembolic complications were observed.

A higher BMI (mean 34.2) was apparent in those patients suffering complications than those not (mean 26.9). No significant differences existed in complication rates relative to implant type, type of bone graft used or patient age at surgery.

Complications following OWHTO appear higher than previously reported in the literature; serious complications appear rare.

We aimed to analyse complication rates following medial opening-wedge high tibial osteotomy (OWHTO) for knee OA.

A regional retrospective cohort study of all patients who underwent HTO for isolated medial compartment knee OA from 2003–2013.

115 OWHTO were performed. Mean age = 47 (95%CI 46–48). Mean BMI = 29.1 (95%CI 28.1–30.1).

Implants used: 72% (n=83) Tomofix, 21% (n=24) Puddu plate, 7% (n=8) Orthofix Grafts used: 30% (n=35) autologous, 35% (n=40) artificial and 35% (n=40) no graft. 25% (n=29) of patients suffered 36 complications. Complications included minor wound infection 9.6%, major wound infection 3.5%, metalwork irritation necessitating plate removal 7%, non-union requiring revision 4.3%, vascular injury 1.7%, compartment syndrome 0.9%, and other minor complications 4%.

Apparent higher rates of non-union occurred with the Puddu plate (8.3%) relative to Tomofix (3.6%) but was not statistically significant. No other significant differences existed in complication rates relative to implant type, bone graft used, patient age or BMI.

Serious complications following HTO appear rare. The Tomofix has an apparent lower rate of non-union compared to older implants but greater numbers are required to determine significance. There is no significant difference in union rate relative to whether autologous graft, artificial graft or no graft is used.

In the current austere financial climate within the NHS where local healthcare Trusts are reimbursed in a Payment by Results system it is important that we accurately identify the costs associated with surgical procedures.

We retrospectively reviewed data of 589 consecutive patients undergoing lower limb arthroplasty surgery and recorded their age, BMI and co-morbidities. The effect of these parameters on operative duration and length of stay (LOS) was analysed.

We demonstrate that for a 1 point increase in BMI we expect LOS to increase by a factor of 2.9% (p<0.0001) and mean theatre time to increase by 1.46 minutes (p<0.0001). We also show that for a l-year increase in age, we expect LOS to increase by a factor of 1.2% (p<0.0001).

We have calculated the extra financial costs associated with this and believe that the current OPCS coding system for obesity underestimates the financial impact of increasing BMI and age on lower limb arthroplasty Trusts are being inadequately reimbursed.

The results of this study have been used to produce a chart that allows prediction of LOS following lower limb arthroplasty based on BMI and age. We also believe that the data produced is of use in planning operating lists.

Unicompartmental knee replacements offer improved function with more rapid recovery compared to TKR. There is no published experience with introducing this procedure as a day case in the UK. We report on our experience with a new protocol allowing the patient to be discharged on the day of surgery.

A new combination of anaesthetic and surgical techniques are employed. Paracetamol, ibuprofen and pregabalin are given pre-operatively. Patients receive a GA and a subsartorial saphenous nerve block is administered under ultrasound control. The surgery is performed using a routine minimally invasive technique. The joint and surrounding tissues are infiltrated with a combination of LA and adrenaline. Wound closure is with subcutaeneous suture and tissue glue.

Patients are mobilised on the day of surgery and if comfortable discharged on paracetamol, codeine, ibuprofen, tramadol P.R.N and buprenorphine patch.

Length of stay, pain scores, presence of nausea/vomiting, dizziness, drowsiness, post-operative bleeding and patient satisfaction are all recorded.

18 out of 19 patients have been discharged on the day of surgery. All record high satisfaction.

Patients can be safely discharged on the day of surgery after UKR with high levels of satisfaction. We believe we are the first unit in the UK to achieve this.

Introduction

High Tibial Osteotomy has become an increasingly popular management option for patients with painful medial compartment osteoarthritis. The Fujisawa method used to calculate the angle of correction is well-documented but there have been no studies to look at the reliability and accuracy of web-based systems to calculate this angle.

Introduction

The management of young patients with painful medial compartment osteoarthritis remains controversial. Opening wedge medial high-tibial osteotomy using a locking plate has shown good results in selected patients. This cohort of patients has high physical demands and previous studies have warned against operating on patients with increased body mass index (BMI).

Aims

NICE recommends oral anticoagulants after lower limb arthroplasty, as they are thought to lead to better outpatient compliance than injected anticoagulants. Having prescribed self-administered Dalteparin for many years, we began using oral Dabigatran in December 2010. The change afforded an opportunity to compare compliance and acceptability of the two treatments.

Introduction

The management of young patients with painful medial compartment osteoarthritis remains controversial. Opening wedge medial high-tibial osteotomy using a locking plate has shown good results in selected patients. This cohort of patients has high physical demands and previous studies have warned against operating on patients with increased body mass index (BMI).

Aims

The study was designed to gauge adequacy of pain relief in the first 5 days following TKA, in particular comparing the Painbuster device (B Braun, Sheffield, UK) with more routine modalities.

Background: It has been shown before that when compared with the medial para-patellar approach, the mid-vastus approach for TKR results in less post-operative pain for patients and more rapid recovery of straight leg raise. As far as we are aware the post-operative length of stay of the two groups of patients has not been compared. We postulated that the reduced pain and more rapid recovery of straight leg raise would translate into an earlier, safe, discharge home for the mid-vastus patients compared with those who underwent a traditional medial para-patellar approach.

Methods: Twenty patients operated on by each of five established knee arthroplasty surgeons were evaluated prospectively with regard to their pre and post-operative range of movement, time to achieve straight leg raise post-operatively and length of post-operative hospital stay. One of the surgeons performed the mid-vastus approach, and physiotherapists recorded the measurements.

Results: The results were analysed using a standard statistical software package, and although the mean length of stay was lower for the mid-vastus patients, the difference did not reach a level of significance (p= 0.13). The time taken to achieve straight leg raise post-operatively was significantly less in the mid-vastus group (p< 0.001).

Conclusion: Although this study confirms previous findings that the mid-vastus approach reduces the time taken for patients to achieve straight leg raise, when compared with the medial para-patellar approach, on its own it does not translate into a significantly shorter length of hospital stay.

In order to reduce the length of post-operative hospital stay with an accelerated rehabilitation program for TKR, a multi-disciplinary approach is required.

Aim: To assess and establish the reason for repeating knee arthroscopies. A retrospective study at Torbay General Hospital.

Methods and results: The sample period was from January-2004 to July 2007 during which 695 knee arthroscopies were done, of which 71 patients (10 %) were coded as having same knee scoped again. A total of 58 out of 71 patients notes were available for review of which 12 were excluded due to coding-error and septic-arthritis. Among the 45 patients included, 67% were males and mean age was 44 years (range 17 to 70 years). The average time from listing the patient to actual scope was 20 weeks (range 0 to 54). At their first scope 24 patients required partial meniscectomies, of which 11 (45%) and 6 (25%) patients had posterior-horn and body of medial meniscal tears respectively, and 7 (29%) had tears in posterior-horn of lateral meniscus. Among the 23 who had chondral defects, 73% had changes on medial femoral condyle, 70% on patella, 52% on medial tibial condyle, 47% over lateral femoral condyle, 43% on trochlear grove, and 39% on lateral tibial condyle. Thirty-three-percent patients had anterior cruciate ligament (ACL) tears and 6% require loose bodies removal.

Average time between re-scopes was 16 months (range 0 to 3.5 years). The numbers of patients requiring repeat knee arthroscopy for similar clinical problems were 16 out of 695 patients (2.3%). During repeat arthroscopies, 10/16 (62%) required procedures on meniscus, 4/16 (25%) for osteochondral lesions 2 patients had same diagnosis as ACL tears. 90% of partial meniscectomies were repeated on the posterior horn of both medial and lateral meniscus, and 20% required trimming of body of the meniscus.

Conclusion: Contrary to general opinion being too many patients knees are been re-scoped, only 16/695 patients (2.3%) had their knees re-scoped for similar problem as found at first arthroscopy. 62% of these patients required partial meniscectomy mainly on the posterior-horns and 25% had chondral defects. We concluded that MR-arthrogram should be considered due to its specificity and sensitivity as detailed in literature, before performing repeated knee arthroscopy.

Objective: The aim of this prospective observational study was to evaluate the feasibility of performing ACL reconstruction with femoral nerve block as a day-case procedure, implement the necessary changes and audit the outcomes following instigation of a day-case protocol.

Methods: From November 2005 to April 2006 all patients undergoing ACL reconstruction were entered into a day-case feasibility study. Any issues preventing day-case discharge were identified, and in November 2006 changes were implemented to address these. Since then all ACL reconstruction patients have been treated as day-cases using femoral nerve blocks. Patients are discharged if safe, and contacted 1 and 7 days postoperatively to detect any problems and to assess patient satisfaction. Patients undergoing ACL reconstruction with femoral nerve block in the independent sector, by the same surgeon but without a strict protocol were used as a comparison group.

Results: 18 patients have followed the day-case pathway, 15 (83%) being discharged as day-cases. The other cases had afternoon surgery delaying discharge. Only 25% (3/12) patients treated in the independent sector were discharged on the day of surgery. All patients had good working femoral nerve blocks, were able to mobilise safely with crutches and reported no adverse effects from their blocks at follow-up phone calls. All reported good analgesia at home and high satisfaction with being a day-case.

Conclusions: With appropriate education of patients and staff, and following a day-case protocol, ACL reconstruction with femoral nerve block is a safe day-case procedure with high patient satisfaction.

Objective: The aim of this prospective observational study was to evaluate the feasibility of performing ACL reconstruction with femoral nerve block as a day-case procedure, implement this change and audit our outcomes.

Methods: From November 2005 to April 2006 all patients undergoing ACL reconstruction were entered into a day-case feasibility study. Any issues preventing day-case discharge were identified, and in November 2006 changes were implemented to address these. Since then all ACL reconstruction patients have been treated as day-cases using femoral nerve blocks. Patients are discharged if safe, and contacted 1 and 7 days postoperatively to detect any problems and to assess patient satisfaction.

Results: 23 patients have followed the day-case pathway, 15 being discharged as day-cases. The other cases had afternoon surgery delaying discharge or surgery in the independent sector where the protocol was not enforced. All patients had good working femoral nerve blocks, were able to mobilise safely and easily with crutches and reported no adverse effects from their blocks at follow-up phone calls. All reported good analgesia at home and high satisfaction with being a day-case.

Conclusions – With appropriate education of patients and staff, ACL reconstruction with femoral nerve block is a safe day-case procedure with high patient satisfaction.

Patients were followed up retrospectively by a combination of clinical review, mail and telephone questionnaires. The Lysholm knee (LS) and the Tegner activity (TA) scores were recorded.

From July 1991 until February 1999 75 meniscal repairs were carried out in 70 patients by a single surgeon (PJR). The average age of the patients was 26yrs 8 months, 52 male and 18 female. 14 patients (18.6%) were lost to formal follow-up. Lysholm Score (LS) and Tegner Activity (TA) scores were available on 58 repairs for analysis. The average follow-up was 6 yrs 4 months (range 3 yrs 4 months to 10 yrs 9 months), Average scores were LS=89.2, TA before surgery=6.2, TA after surgery=5.7. 9 patients had menisectomy following retear due to further injury. The overall success rate was 86.9%, with 74.1% scoring clinically good or excellent on the Lysholm Score.

There was a trend of improved results for patients over 30 yrs; those with longer tears and lateral repairs did slightly better. Those with ACL laxity had a significantly better result. The time interval to repair following injury did not make a difference. With an overall success rate of 86.9% the authors would recommend this traditional technique in light of the more recent techniques presently in use.

The aim of this study was to clinically assess the outcome of arthroscopically assisted inside to outside meniscal repair. Seventy-five meniscal repairs were carried out, the average age was twenty-six year eight months. Average follow up was six years four months, fourteen patients (18.6%) were lost to follow up. The overall success rate was 89.5%, with 78.1% scoring clinically good or excellent on the Lysholm Score. Improved results were shown for patients over thirty years, those with ACL laxity and with longer tears. Delay in repair did not make a difference. Clinically lateral repairs did better. With an overall success rate of 89.5% the authors would recommend this traditional technique.

The purpose of this study was to clinically assess the mid to long-term outcome of arthroscopically assisted inside to outside meniscal repair.

Patients were followed up retrospectively by a combination of clinical review, mail and telephone questionnaires. The Lysholm knee (LS) and the Tegner activity (TA) scores were recorded.

From July 1991 until February 1999 seventy-five meniscal repairs were carried out in seventy patients by a single surgeon (PJR). The average age of the patients was twenty-six year eight months, there were fifty-two male and eighteen female patients. Fourteen patients (18.6%) were lost to formal follow up. Of the seventyfive repairs carried out full data, Lysholm Score (LS) and Tegner Activity (TA) scores were available on fifty-five repairs for analysis. The average follow up was six years four months (range three years four months to ten years nine months), Average scores were LS=87.1, TA before surgery=6.1, TA after surgery=5.5. 9 patients had menisectomy following re-tear due to further injury.

The overall success rate was 89.5%, with 78.1% scoring clinically good or excellent on the Lysholm Score.

In contrast to previous studies improved results were shown for patients over thirty years, those with ACL laxity and those with longer tears. The time interval to repair following injury did not make a difference. In agreement with previous studies, clinically lateral repairs did better.

With an overall success rate of 89.5% the authors would recommend this traditional technique in light of the more recent techniques presently in use.

We have assessed the clinical and radiological outcome of traumatic knee injuries resulting in open reconstruction of the posterior cruciate ligament using synthetic ligaments at the University of Toronto, Ontario. Pre and post-operative stress radiographs at 30 and 90 degrees were performed, along with IKDC, Lysholm and Tegner scoring.

Between 1995 and 2002, 11 patients were operated on. The average time to surgery was 42.3 months (range 1 to 252 months). The average age at time of surgery was 34.1 (26 – 48). The length of follow up ranged from 6 to 87 months.

IKDC scoring showed that no patient returned to normal. 5 were nearly normal, 4 abnormal and 2 severely abnormal. The average Lysholm score was 83 (58 – 95). 2 scored excellent, 6 good, 2 fair and 1 poor. The average Tegner score pre-injury was 6.3, prior to surgery 1.8 and post-operatively 3.9 (twice weekly jogging). Stress radiographs showed a decrease in antero-posterior laxity at 30 and 90 degrees although statistical significance was not achieved (p = 0.229 and 0.474 respectively).

We conclude that PCL reconstruction restores the normal biomechanics of the knee allowing a more normal function. The synthetic ligament allowed early weight bearing and range of movement mobilisation. The Tegner scores showed a considerable improvement from pre to post-operative values. The stress radiographs showed a decrease in the antero-posterior laxity. Although the IKDC scores did not show any normal knees post-operatively, this was expected due to the severity of the initial injuries.

The authors recommend the use of synthetic ligaments to reconstruct the PCL.