Controversy remains regarding the optimal post-operative analgesic regimen following total knee replacement. A delicate balance is required between the provision of adequate pain relief and early mobilisation. By reviewing 29 randomised trials we sought to establish whether local infiltration of analgesia directly into the knee during surgery provides better pain relief and a more rapid rehabilitation. Although we were able to conclude that local infiltration can provide improved post-operative pain relief, and to suggest the most promising technique of administration, there is no evidence that it reduces hospital stay.

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As pressures mount on efficiency, hip and knee arthroplasty surgery is increasingly being performed during weekends. Despite the growing trend for weekend orthopaedic surgery, there are virtually no published data on the effect of weekend operating on the length of hospital stay (LOS).