Difficulties arise when counselling younger patients on the long-term sequelae of a minor knee chondral defect. This study assesses the natural history of patients with grade 2 Outerbridge chondral injuries of the medial femoral condyle at arthroscopy. We reviewed all arthroscopies performed by one surgeon over 12 years with Outerbridge grade 2 chondral defects. Patients aged 30 to 59 were included. Meniscal injuries found were treated with partial menisectomy. All patients had five-year follow up minimum. Primary outcome measure was further interventions of total or unicondylar arthroplasty or high tibial osteotomy. We analysed 3,344 arthroscopies. Average follow up was 10 years (Range 5–17 years). A total of 357 patients met inclusion criteria of which 86 had isolated medial femoral condyle disease. Average age was 50 at the time of arthroscopy. Average BMI at surgery was 31.7 and average chondral defect area was 450 mm². Isolated MFC chondral disease had a 10.5% intervention rate. Intervention occurred at a mean of 8.5 years post primary arthroscopy. In young patients Outerbridge II chondral injuries affecting ≥2 compartments have a high rate of further intervention within a decade. This information is crucial in counselling young patients on long-term sequelae of benign chondral lesions.

Introduction

It is now widely accepted that acute knee dislocations should be managed operatively. Most published studies are from outside the UK and from major trauma or specialist centres. The aim of the study is to report the functional outcomes of all patients presenting with an acute knee dislocation at our institution all of whom were surgically managed. The results were then compared to other published series. The hypothesis being that there would be no significant difference in the functional outcome scores between the groups.

Introduction

It is now widely accepted that acute knee dislocations should be managed operatively. Most published studies are from outside the UK and from major trauma or specialist centres. The aim of the study is to report the functional outcomes of all patients presenting with an acute knee dislocation at our institution all of whom were surgically managed. The results were then compared to other published series. The hypothesis being that there would be no significant difference in the functional outcome scores between the groups.

Introduction: Arthroplasty infection is both devastating for the individual and expensive for the healthcare system. Many measures are taken during a patient’s pathway to try and prevent this complication. Ring fencing beds is perceived to be beneficial in this struggle, but due to complexity it is difficult to identify the effect of ringfencing on infection rates; furthermore to date there is little published data to support it’s use. We present our data of infection rates before and after the introduction of a ringfence policy. The antibiotic prophylaxis regime was the only other variable to change.

Methods: Two 24 month periods were selected before and after the introduction of a strict ringfence policy. In the first period (pre-ringfence period) patients were MRSA screened pre operatively but not placed in a ward with a ringfence policy. Cefuroxime was administered as prophylaxis. In the second period (ringfence period) screened patients were only admitted to a ward where all patients were known to be MRSA free. Tei-coplanin prophylaxis was administered. The hospital building, operating theatres, implants and surgeons were the same for both groups. Infections were identified retrospectively by analysing clinical notes and laboratory results. Statistical analysis was performed using Fisher’s exact test.

Results: Both patient groups had similar demographics. More joints were performed in the ringfence period compared to the pre-ringfence period (870 vs 590), with a shorter average length of stay (7 vs 11 days). In the ring-fencing period there was an overall significant reduction in early infections (1.26% vs 3.05%, p< 0.05). MRSA was eliminated (2.2% vs 0%, p< 0.05)

Conclusions: A combination of these two interventions led to a significant reduction in early infection rates and the elimination of MRSA in primary joint arthroplasty patients, even though the exact contribution of each intervention could not be established.

Background: We have noted a concerning number of early failures (as defined by revision) for Preservation medial mobile-bearing uni-compartmental knee replacements (UKR’s) implanted in our hospital. This study retrospectively reviewed the postoperative radiographs to see if these were as a result of surgical technical failure.

Methods: Between 2003 and 2004, 43 medial mobile-bearing Preservation UKR’s were implanted into 39 patients. The average age of the patients at the time of the index procedure was 61.4 years (range, 46–85), (20 males). The immediate post-operative radiographs were reviewed by 2 independent orthopaedic consultants and a registrar, who were blinded to the patient outcomes, using the radiographic criteria used for the Oxford UKR. We however, particularly tried to identify any medio-lateral offset between femoral and tibial components due to the constrained nature of the prosthesis. A compound error score for all other technical errors was also calculated for each patient.

Results: Six (13.9%) of 43 knees were revised (5 for persistent pain, 1 for tibial component subsidence). Technical errors were few and no correlation was found between post-operative radiographic appearances and the subsequent need for revision. The mean compound error score (maximum value 18) was 4.5 (range, 2–9) in the revision cases and in the non revised cases 3.2 (range, 0–8).

Conclusions: We believe this study gives credence to the opinion that the DePuy Preservation mobile-bearing implant has design faults and is over-constrained leading to early failures in some cases.