Analysis of Postoperative Venous Thromboembolism in Patients With Chronic Ulcerative Colitis: Is It the Disease or the Operation?

BACKGROUND: Patients with IBD have a higher baseline risk of venous thromboembolism, which further increases with surgery. Therefore, extended venous thromboembolism chemoprophylaxis has been suggested in certain high-risk cohorts. OBJECTIVE: The purpose of this study was to determine whether the underlying diagnosis, operative procedure, or both influence the incidence of postoperative venous thromboembolism. DESIGN: This was a retrospective review. SETTINGS: The American College of Surgeons–National Surgical Quality Improvement Project database was analyzed. PATIENTS: The NSQIP database was queried for patients with chronic ulcerative colitis and non-IBD undergoing colorectal resections using surgical Current Procedural Terminology codes modeled after the 3 stages used for the surgical management of chronic ulcerative colitis from 2005 to 2013. MAIN OUTCOME MEASURES: We measured 30-day postoperative venous thromboembolism risk in patients with chronic ulcerative colitis based on operative stage and risk factors for development of venous thromboembolism. RESULTS: A total of 18,833 patients met inclusion criteria, with an overall rate of venous thromboembolism of 3.8. Among procedure risk groups, venous thromboembolism rates were high risk, 4.4%; intermediate risk, 1.6%; and low risk, 0.7% (across risk groups, p

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