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Identifying important predictors for anastomotic leak after colon and rectal resection: prospective study on 616 patients

Koianka Trencheva, Kevin P Morrissey, Martin Wells, Carol A Mancuso, Sang W Lee, Toyooki Sonoda, Fabrizio Michelassi, Mary E Charlson, Jeffrey W Milsom
Annals of Surgery 2013, 257 (1): 108-13

OBJECTIVE: The purpose of this study was to identify patient, clinical, and surgical factors that may predispose patients to anastomotic leak (AL) after large bowel surgery.

BACKGROUND: Anastomotic leak is still one of the most devastating complications following colorectal surgery. Knowledge about factors predisposing patients to AL is vital to its early detection, decision making for surgical time, managing preoperative risk factors, and postoperative complications.

METHODS: This was a prospective observational, quality improvement study in a cohort of 616 patients undergoing colorectal resection in a single institution with the main outcome being AL within 30 days postoperatively. Some of the predictor variables were age, sex, Charlson Comorbidity Index (CCI), radiation and chemotherapy, immunomodulator medications, albumin, preoperative diagnoses, surgical procedure(s), surgical technique (laparoscopic vs open), anastomotic technique (staple vs handsewn), number of major arteries ligated at surgery, surgeon's experience, presence of infectious condition at surgery, intraoperative adverse events, and functional status using 36-Item Short Form General Health Survey.

RESULTS: Of the 616 patients, 53.4% were female. The median age of the patients was 63 years and the mean body mass index was 25.9 kg/m. Of them, 80.3% patients had laparoscopic surgery and 19.5% had open surgery. AL occurred in 5.7% (35) patients. In multivariate analysis, significant independent predictors for leak were anastomoses less than 10 cm from the anal verge, CCI of 3 or more, high inferior mesenteric artery ligation (above left colic artery), intraoperative complications, and being of the male sex.

CONCLUSIONS: Multiple risk factors exist that predispose patients to ALs. These risk factors should be considered before and during the surgical care of colorectal patients.


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