Venous thromboembolism (VTE) prevention in hospitalized patients has been promoted as a patient safety priority by a multitude of agencies.
1 Despite the fact that colorectal surgery is one of the most commonly performed procedures, the American College of Chest Physicians’ revised evidence-based guidelines regarding strategies to reduce VTE among hospitalized surgical patients do not offer comprehensive recommendations for patients undergoing colorectal surgery.
2,3 General strategies recommended in the American College of Chest Physicians’ guidelines regarding abdominal surgery, as well as the American Society of Clinical Oncology’s guidelines for VTE prevention in cancer,
4 may be extrapolated and applied to patients with colorectal cancer. However, these patients represent a diverse population with an array of patient-related and procedure-associated factors that place them at particularly high risk of VTE. Quiz Ref ID Colorectal surgery is often performed for inflammatory disease or malignancy, which are known risk factors for VTE.
5-8 In addition, lithotomy positioning, prolonged operative times, and pelvic dissection are procedure-specific risk factors associated with VTE.
9 Quiz Ref ID In the absence of appropriate prophylaxis, rates of radiologically and clinically diagnosed VTE, including deep vein thrombosis (DVT) and pulmonary embolism, have been as high as 40% and 5%, respectively, following colorectal surgery.
9 Among patients undergoing colorectal procedures who receive guideline-recommended chemoprophylaxis, VTE rates are as high as 9.4%.
10 Furthermore, VTE risk peaks approximately 3 weeks after surgery and remains increased up to 12 weeks following surgery
11 when most patients have already left the hospital. These data have been the impetus for exploring potential benefits of extended prophylaxis regimens.
12,13