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Abstract Journal Colorectal Surgery

Journal Colorectal Surgery CR001 EXTERNAL VALIDATION OF A WEB-BASED RISK CALCULATOR FOR THE PREDICTION ANASTOMOTIC LEAK AFTER COLON CANCER SURGERY LAUREN COHEN, TARIK SAMMOUR, AYESHA KARUNATILLAKE, MARK LEWIS, MATTHEW LAWRENCE, ANDREW HUNTER, JAMES MOORE AND MICHELLE THOMAS Royal Adelaide Hospital, SA Purpose: Recently published data supports the use of a simple webbased risk calculator (www.anastomoticleak.com) for the prediction of anastomotic leak after colectomy. The aim of this study is to externally validate this calculator on a larger dataset. Methods: Consecutive adult patients undergoing elective or emergency colectomy for colon cancer at a single institution over a nine year period were identified using the Binational Colorectal Cancer Audit (BCCA) database. Patients with a recto-sigmoid cancer, an R2 cancer resection, or a diverting ostomy were excluded. The primary outcome was anastomotic leak within 90 days as defined by previously published criteria. Area under receiver operating characteristic curve analysis (AUROC) was performed to assess the predictive value of the calculator, and compare this with results from the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) calculator. Results: A total of 656 patients were identified from the BCCA database, of which 481 patients met the inclusion criteria and 402 had complete data available for all the calculator variables. One hundred and fifty nine cases (39.6%) were performed laparoscopically, and 59 (14.7%) had emergency surgery. The anastomotic leak rate was 7.2%, with one third of patients (31.0%) requiring reoperation and stoma formation. The anastomotic leak risk calculator was significantly predictive of anastomotic leak (AUROC 0.73, P < 0.0001), and performed better than the ACS-NSQIP calculator which was not predictive (AUROC 0.58, P 0.144). Conclusion: A simple anastomotic leak risk calculator is significantly predictive of anastomotic leak after colon cancer resection. CR002 CHEWING GUM AFTER ABDOMINAL SURGERY DOES NOT REDUCE LENGTH OF HOSPITAL STAY: RESULTS OF A MULTICENTER RANDOMIZED CONTROLLED TRIAL HIDDE KROON, E DE LEEDE, N VAN LEERSUM, V VAN WEEL, J VAN DER SIJP