Negative Pressure Therapy in Preventing Infection After Surgery in Patients With Colon, Rectal, Pancreatic, or Peritoneal Surface Cancer

Inclusion Criteria: * Surgical resection for a colorectal, pancreatic, or peritoneal surface malignancy * The scheduled procedure will be performed via midline laparotomy * The planned procedure is a clean-contaminated (class II) case (includes gastric, small bowel, and colorectal resections, as well as bile or pancreatic duct transections) * Ability to understand and the willingness to sign a written informed consent document (either directly or via a legally authorized representative) Exclusion Criteria: * Emergent cases will not be included in the study * Pregnant patients will not be included in the study as pregnancy is a relative contraindication for these types of surgical procedures * Clean (class I), contaminated (class III) and dirty (class IV) procedures will likewise be excluded * Patients on chronic immunosuppressive medications, including steroids, within the past three months * Patients with a history of skin allergy to iodine or adhesive drapes * The planned procedure involves foreign material (such as mesh or subcutaneous drains) being left in the subcutaneous space at the time of surgery (for example, a ventral hernia repair); surgical drains that are placed to drain an intraabdominal space and exit the abdominal wall remote from the incision are allowed in the study