BACKGROUND: Prevention of venous thromboembolism after colorectal surgery remains challenging. National guidelines endorse thromboembolism prophylaxis for 4 weeks after colorectal cancer resection. Expert consensus favors extended prophylaxis after IBD surgery. The actual frequency of prescription after resection remains unknown.
OBJECTIVE:This study aimed to assess prescription of extended, postdischarge venous thromboembolism prophylaxis after resection in Michigan.DESIGN: This is a retrospective review of elective colorectal resections within a statewide collaborative receiving postdischarge, extended-duration prophylaxis.
SETTING:This study was conducted between October 2015 and February 2018 at an academic center.PATIENTS: A total of 5722 patients (2171 with colorectal cancer, 266 with IBD, and 3285 with other).
MAIN OUTCOME MEASURES:We compared the prescription of extended, postdischarge prophylaxis over time, between hospitals and by indication.
RESULTS:Of 5722 patients, 373 (6.5%) received extended-duration prophylaxis after discharge. Use was similar between patients undergoing surgery for cancer (282/2171, 13.0%) or IBD (31/266, 11.7%, p = 0.54), but was significantly more common for both patients undergoing surgery for cancer or IBD in comparison with patients with other indications (60/3285, 1.8%, p < 0.001). Use increased significantly among patients with cancer (6.8%-16.8%, p < 0.001) and patients with IBD (0%-15.1%, p < 0.05) over the study period. For patients with other diagnoses, use was rare and did not vary significantly (1.5%-2.3%, p = 0.49). Academic centers and large hospitals (>300 beds) were significantly more likely to prescribe extended-duration prophylaxis