Pharmacological VTE Prophylaxis After Radical Prostatectomy

Risk Stratification and Prophylaxis

The American College of Chest Physicians recommends pharmacological prophylaxis after radical prostatectomy for patients at moderate-to-high VTE risk (Caprini score ≥3) who are not at high bleeding risk, using LMWH or low-dose unfractionated heparin for at least 7-10 days, with extended prophylaxis up to 4 weeks considered for patients with additional high-risk features such as extended pelvic lymph node dissection, obesity, prior VTE history, or restricted mobility 1, 2, 3
For patients at moderate risk (Caprini 3-4), LMWH, low-dose UFH, or mechanical prophylaxis is recommended 3
High-risk patients (Caprini ≥5) should receive pharmacological prophylaxis with LMWH or UFH strongly recommended 3
The American College of Chest Physicians specifically recommends extended-duration LMWH prophylaxis (4 weeks) for high-VTE-risk patients undergoing abdominal or pelvic surgery for cancer 3
ASCO guidelines endorse extended prophylaxis for major abdominal/pelvic cancer surgery with high-risk features 2, 7

LMWH (preferred) is recommended as enoxaparin 40 mg subcutaneously once daily, starting 6-8 hours postoperatively 6
Low-dose UFH is recommended as 5,000 units subcutaneously every 8-12 hours depending on risk level 6
Adjust enoxaparin to 30 mg daily if creatinine clearance <30 mL/min 6, 4

Initiation of pharmacological prophylaxis should be 6-8 hours postoperatively (not preoperatively for RP due to bleeding concerns) 6
Minimum duration of pharmacological prophylaxis is 7-10 days for all patients receiving prophylaxis 7, 8
Extended duration of up to 4 weeks is recommended for high-risk features 2, 3