Two methods of skin closure in abdominal operations: a controlled clinical trial

Operative bacterial contamination of surgical wounds is common. The ability of the host to eradicate these bacteria and prevent subsequent wound infection is affected by a number of factors; one of these has been shown experimentally to be the presence of suture material in the subcutaneous tissues. In a prospective randomized controlled clinical trial in 341 abdominal operations we compared the primary infection rates after two methods of skin closure: either vertical mattress monofilament nylon sutures (182 patients) or steel clips which penetrated only the dermis (159 patients). All patients received a single dose of a cephalosporin intravenously at induction of anaesthesia and neither sutures nor drains were placed in the subcutaneous plane. The overall wound infection rate in the sutured wounds was 17.0 per cent, compared with 6.3 per cent in those closed by clips (X2 = 9.26, P less than 0.01). We conclude that skin closure with clips reduces the incidence of wound infection in patients in whom operative parietal contamination has occurred.