BACKGROUND: The effects of mechanical bowel preparation (MBP) on morbidity (e.g., anastomotic leakage and surgical site infection) have been evaluated. Its effect on early recovery after surgery has drawn renewed attention, and its use is discouraged in the postsurgical management of enhanced recovery. However, most surgeons in Japan prefer polyethylene glycol (PEG) for MBP. We investigated the effect of MBP with PEG on postoperative intestinal motility. MATERIALS AND METHODS: We prospectively evaluated a consecutive series of 258 colon cancer patients who underwent colonic resection and primary anastomosis. We orally administered 2000 mL of PEG in the PEG group and did not administer PEG to patients in the no-PEG group. Postoperative gastrointestinal motility was assessed with radiopaque markers. All patients ingested radiopaque markers 2 h before surgery. Postoperative intestinal motility was radiologically assessed by counting the number of residual markers. Abdominal radiography was conducted on postoperative days 1, 3, and 5 to count residual markers in the large and small intestines. RESULTS: The total number of residual markers in the no-PEG group was less than that in the PEG group on day 5 (P < 0.01) but not on days 1 and 3. On all 3 d, the numbers of residual markers in the small intestine were significantly less in the no-PEG group than in the PEG group (P < 0.001). There were no differences in postoperative complications between the no-PEG and PEG groups. CONCLUSIONS: PEG can negatively affect postoperative intestinal motility, and MBP using PEG is unnecessary in elective colon cancer surgery.
BACKGROUND: The effects of mechanical bowel preparation (MBP) on morbidity (e.g., anastomotic leakage and surgical site infection) have been evaluated. Its effect on early recovery after surgery has drawn renewed attention, and its use is discouraged in the postsurgical management of enhanced recovery. However, most surgeons in Japan prefer polyethylene glycol (PEG) for MBP. We investigated the effect of MBP with PEG on postoperative intestinal motility. MATERIALS AND METHODS: We prospectively evaluated a consecutive series of 258 colon cancerpatients who underwent colonic resection and primary anastomosis. We orally administered 2000 mL of PEG in the PEG group and did not administer PEG to patients in the no-PEG group. Postoperative gastrointestinal motility was assessed with radiopaque markers. All patients ingested radiopaque markers 2 h before surgery. Postoperative intestinal motility was radiologically assessed by counting the number of residual markers. Abdominal radiography was conducted on postoperative days 1, 3, and 5 to count residual markers in the large and small intestines. RESULTS: The total number of residual markers in the no-PEG group was less than that in the PEG group on day 5 (P < 0.01) but not on days 1 and 3. On all 3 d, the numbers of residual markers in the small intestine were significantly less in the no-PEG group than in the PEG group (P < 0.001). There were no differences in postoperative complications between the no-PEG and PEG groups. CONCLUSIONS:PEG can negatively affect postoperative intestinal motility, and MBP using PEG is unnecessary in elective colon cancer surgery.