A Prospective Evaluation for a Possible Safe Skin Bridge in Elective Foot Surgery

Abstract

Background: In foot and ankle surgery adequate surgical exposure often requires multiple incisions to be used near one another thus creating a skin bridge. As the skin bridge becomes narrower, the wound edge vitality is potentially compromised and therefore the wound’s ability to heal. The impact of local, host and surgical factors on wound healing are well documented in the literature, however little is known about the role of the skin bridge. The aim of this study is to determine if there is a recommendable safe skin bridge in elective foot and ankle surgery. Methods: A prospective study was performed on 56 patients with 60 feet who had elective foot surgery. The length of each incision and distance between the incisions were recorded. The wounds were assessed for complications at 2, 4 and 6 weeks after surgery. Patient demographics and host risk factors were documented. Results: The average incision length was 5.5 (range: 3 to 8.5) cm. The average skin bridge was 3.9 (range: 2 to 6.8) cm. Five (8.3%) of the 60 feet developed a wound complication. Four (80%) of these patients had a known comorbidity. Two patients had diabetes and two were smokers. The incidence of relevant comorbidities was 5.5% (n = 3) for patients without a wound complication (p<0.001). Age did not differ significantly between patients with and without a wound complication. Patients with a wound complication had significantly longer incision lengths (p=0.047). There was no significant independent association between skin bridge width and risk of wound complications (p>0.05) with skin bridge widths of 2cm or larger. Conclusion: No trend towards increased wound complications was identified in skin bridges 2cm or larger, when meticulous surgical technique is practiced and host risk factors optimised, in elective foot surgery.