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Background: Colorectal cancer is the third most common cancer and the second highest cause of cancer mortality in Australia. Despite advances in colorectal surgery, anastomotic leak still occurs in low-risk patients and is a substantial cause of morbidity and mortality. Many operative strategies are used to assess anastomotic integrity such as an air leak test or intraoperative flexible sigmoidoscopy, however an objective anastomotic checklist is yet to be developed and studied. This study aims to develop a photodocumentary anastomotic specific checklist and determine its feasibility for implementation., Methods: Patients undergoing left sided colorectal resections with primary anastomosis without a de-functioning ileostomy were prospectively included between May 2021 and December 2022. A photographic checklist assessing anastomotic perfusion, integrity via either air test or endoscopic image, evidence of complete operative doughnut specimens and the assessment of tension was implemented. The feasibility of an anastomotic checklist was externally validated by four independent colorectal surgeons from Australia, New Zealand and United States of America., Results: The anastomotic checklist was completed in 44 patients. Mean age was 62 years, with 43% male and mean BMI 28. Operations included high anterior resection (45%), low anterior resection (18%), ultra-low anterior resection (20%), reversal of Hartmann's (11%). Median length of stay was 4 days. Complications post operatively were documented in six patients with anastomotic leak in 2% and wound infection in 6.8%. Intraclass correlation coefficients were poor amongst all reviewers with air leak and tension having no inter-reviewer correlation., Conclusion: The introduction of an anastomotic checklist was a feasible tool to systematically assess and document anastomotic integrity. Unfortunately, with the small sample size there was significant discrepancy in inter-observer variability, and this led to poor correlation regarding which patients were typically high risk requiring a temporary ileostomy. Larger studies on the implementation of an anastomotic checklist will be needed to evaluate if it is an inherently feasible approach and if there is an effect on anastomotic leak., (© 2024 The Author(s). ANZ Journal of Surgery published by John Wiley & Sons Australia, Ltd on behalf of Royal Australasian College of Surgeons.)