Perianal local anaesthetic infiltration versus placebo (spinal anaesthesia or GA in both groups)

Perianal local anaesthetic infiltration versus placebo (spinal anaesthesia or GA in both groups)

• In the first study, the mean dose of pethidine given IM postoperatively was similar with perianal bupivacaine infiltration and placebo (Chester 1990); LoE 2)

• In the second study, the number of IM papaveretum doses (0.3 mg/kg) and oral paracetamol doses required were similar with perianal bupivacaine infiltration and placebo (Marsh 1993); LoE 1)