title: One-stage segmental colectomy and primary anastomosis after intraoperative colonic irrigation and total colonoscopy for patients with obstruction due to left-sided colorectal cancer.
abstract: BACKGROUND
  Intraoperative colonic irrigation and intraoperative on-table colonoscopy may be useful for a more accurate diagnosis of colorectal cancer before colectomy in patients with obstructive left-sided colorectal cancer, but the clinical benefit of this technique has not been investigated in large-scale studies.
  
  
  OBJECTIVE
  The aim of this study was to evaluate the usefulness of intraoperative colonic irrigation with a Y-shaped irrigation device and intraoperative colonoscopy in the management of obstructive colorectal cancer in patients undergoing elective surgery.
  
  
  METHODS
  This was a retrospective cohort study of patients undergoing surgical treatment at a single tertiary care institution in Japan.
  
  
  METHODS
  Among 715 consecutive patients with left-sided colorectal cancer, 101 patients (14.1%) with obstructing tumor received intraoperative colonic irrigation and intraoperative colonoscopy before colectomy and primary anastomosis, and 614 patients with nonobstructive colorectal cancer underwent preoperative colonoscopy with mechanical bowel preparation.
  
  
  METHODS
  Detection rates of proximal synchronous lesions, occurrence of postoperative complications, and changes in the surgical procedure prompted by the results of the intraoperative colonoscopy were evaluated.
  
  
  RESULTS
  Intraoperative colonoscopy detected synchronous adenomatous polyps in 27 patients (26.8%), carcinoma in 4 patients (4%), and obstructive colitis in 2 patients (2%). Findings of the intraoperative colonoscopy prompted changes in surgical procedure in 9 patients (8.9%). The overall morbidity in the intraoperative group was 17%, with anastomotic leakages in 3 patients, wound infection in 5, and postoperative ileus in 3 patients. The risk of these complications was not increased in patients with intraoperative colonoscopy with intraoperative colonic irrigation compared with those receiving preoperative colonoscopy with mechanical bowel preparation. The operation time was 28 minutes longer in the intraoperative than in the preoperative group, but neither the time to start of oral intake nor the length of postoperative hospital stay was significantly different between the 2 groups.
  
  
  CONCLUSIONS
  The study is limited by its retrospective nature.
  
  
  CONCLUSIONS
  : In patients with obstructive colorectal cancer, intraoperative colonic irrigation with intraoperative colonoscopy is a useful strategy for detecting synchronous lesions located proximally to the obstructing tumor, without increasing patient morbidity.
authors.affiliation: Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan. sasakik-sur@h.u-tokyo.ac.jp
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Sasaki
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Kazama
authors.forename: Eiji
authors.initials: E
authors.lastname: Sunami
authors.forename: Nelson H
authors.initials: NH
authors.lastname: Tsuno
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nozawa
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Nagawa
authors.forename: Joji
authors.initials: J
authors.lastname: Kitayama
mesh_terms: D018256:Adenomatous Polyps / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D015331:Cohort Studies; D003082:Colectomy / Q000379:methods*; D003092:Colitis / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D005763:Gastroenterostomy; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology*; D007902:Length of Stay / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D012189:Retrospective Studies; D007507:Therapeutic Irrigation / Q000295:instrumentation / Q000379:methods*; D016896:Treatment Outcome