Colorectal anastomotic integrity after anterior resection: is there a role for intraoperative testing?

Two hundred and two consecutive patients having an anterior resection of the rectum were studied retrospectively to determine the usefulness of intraoperative anastomotic testing. Saline introduced via a rectal catheter was used to distend the rectum and any leaks demonstrated were oversewn. Of 119 stapled anastomoses there were two (1.7%) clinical leaks; in both cases intraoperative testing had been negative. Five patients (4.2%) had leaks demonstrated by intraluminal distension. These defects were rectified at the time of operation and no clinical sequelae followed, three patients having had a covering colostomy added. Eighty-three untested handsewn anastomoses were also reviewed; all had a postoperative recovery uncomplicated by a clinical leak. These results raise the question: does intraoperative anastomotic testing produce false positives and/or weaken the anastomosis? We believe that in the three patients who required the addition of a covering colostomy a clinical leak was avoided as a result of the intraoperative test. The technique is simple, effective and probably helps reduce leakage following colorectal anastomoses.