To catheterise or not to catheterise: study in hip and knee primary arthroplasty.

This cross sectional study examines the rate of catheterisation of patients after elective primary hip and knee arthroplasty in an English district general hospital. 50 patients were included in this study, with 19 (37%) being catheterised pre-operatively. Of the remainder, 10 went into retention and had to be catheterised, while the other 21 were managed without a catheter. There was a trend towards more patients requiring catheterisation after axial anaesthetic (42%) compared to non-axial anaesthetic (21%), although this was not significant. We examine the rationale for catheterisation in hip and knee arthroplasty and review the available literature.