The purpose of this study is to determine, in patients who undergo an elective colorectal resection through a midline laparotomy incision, whether the use of negative pressure wound therapy (NPWT) applied to the site of the laparotomy compared to standard care alone, reduces the incidence of surgical site infection (SSI) in the first 30 days postoperatively. The investigators hypothesize that the use of NPWT will reduce the rate of postoperative SSI, as well as decrease the need for Nursing Home Care for SSI, length of hospital stay and return visits related to SSI.