Abstract
Purpose of the study
The aim of this study was to prospectively study the safety, functional outcomes and complications of all patients undergoing bilateral single-stage sequential (BSSS) unicompartmental knee arthroplasty (UKA) in our unit.
Methods and results
394 cemented UKAs were performed in this unit between 2006–2010. A retrospective review identified 38 patients (76 knees) who underwent BSSS UKA, performed by a single surgeon. Patient demographics were recorded as well as pre and post-operative Oxford knee scores, tourniquet times, time to mobilisation, length of in-patient stay and any complications.
There were 22 women and 16 men with a mean age of 64. The mean duration of follow-up was 30 months. The mean total tourniquet time was 83 minutes. The mean time to mobilisation was 18 hours and the average length of stay was 3.5 days. This compares favourably with an institutional average length of stay of two days for a single UKA.
There was a significant improvement in the mean pre- to post-operative Oxford Knee Score (from 14 to 34, p< 0.0001).
One patient required operative fixation of a tibial plateau fracture after sustaining a mechanical fall two months following surgery. There were no other major complications, including thrombo-embolic events or deep infections. Two patients required excision of a superficial suture granuloma.
Conclusion
BSSS UKA provide significant improvement in patient function and can be performed safely with a low complication rate. Patients can benefit from a single hospital admission and anaesthetic whilst the shorter total in-patient stay reduces costs incurred by the hospital.
