Abstract
Controversy exists regarding the appropriate timing for placement of permanent intra-abdominal mesh after inadvertent enterotomy during elective hernia repair. The aim of this study was to examine mesh placement at variable postoperative periods and the subsequent risk of infection. Fifty rodents were divided into five groups. Groups one to four underwent laparotomy, enterotomy, and repair. Physiomesh® was placed at the index operation one, three, or seven days postoperatively in Groups 1, 2, 3, and 4. Group 5 underwent mesh placement only. Necropsy with mesh harvest was performed seven days after placement. Cultures of mesh were obtained and Fisher's exact test was used to compare groups. Bacterial growth postsonication was identified in 30, 30, 50, and 90 per cent versus 20 per cent in controls. Compared with controls, there was significantly increased risk of mesh infection when it was placed seven days after enterotomy (P = 0.006). There was no significant difference in bacterial growth when mesh was placed at the time of enterotomy, one or three days later. The risk of bacterial contamination of permanent mesh placed immediately after inadvertent enterotomy during elective hernia repair is as safe as placing mesh at one or three days. Placing mesh at seven days significantly increased the risk of mesh contamination.
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