Risk Stratification & Recommended Prophylaxis
| Caprini Score | VTE Risk Level | Estimated 30-day VTE Risk | Recommended Prophylaxis |
|---|
| 0–1 | Lowest | < 1% | Early ambulation; no pharmacological prophylaxis |
| 2 | Low | ~1–2% | Mechanical (IPC/GCS); no pharmacological unless bleeding risk low |
| 3–4 | Moderate | ~3% | LMWH (enoxaparin 40 mg OD) + IPC stockings; OR LDUH (5000 U 12-hourly) |
| ≥ 5 | High | ~6–12% | LMWH + IPC; consider extended prophylaxis (28 days post-major abdominal or pelvic surgery for cancer) |
| ≥ 9 | Highest | > 12% | Extended pharmacological prophylaxis; haematology review for thrombophilia workup |
VTE risk estimates from Bahl 2010 validation cohort in surgical patients. Prophylaxis recommendations follow ACCP 2012 and ASH 2019 guidelines. Always balance VTE risk against bleeding risk before initiating pharmacological prophylaxis.
Clinical Application
- Bleeding risk assessment must accompany VTE scoring. Pharmacological prophylaxis is generally contraindicated in active bleeding, thrombocytopenia (platelets <50), uncorrected coagulopathy, or within 12 hours of neuraxial anaesthesia. In these cases, mechanical prophylaxis (IPC + GCS) is the default.
- Extended prophylaxis: For cancer patients undergoing major abdominal or pelvic surgery with Caprini ≥ 5, ACCP guidelines recommend extending LMWH prophylaxis to 4 weeks postoperatively (ENOXACAN II, FAME trials). This is significantly underutilised in practice.
- Age note: Score age 41–60 (1 pt), 61–74 (2 pts), or ≥75 (3 pts) — only the highest applicable age band.
- Surgery type note: Score the most invasive procedure planned — do not double-score multiple procedures.
- Malignancy: Active or previous cancer scores 2 points. Cancer surgery is among the highest VTE risk procedures — most cancer operation patients will have a Caprini score ≥ 5.
- Mechanical prophylaxis with intermittent pneumatic compression (IPC) devices should be started preoperatively (before induction) in all moderate and high-risk patients. Graduated compression stockings (GCS) are additive to IPC but not equivalent as monotherapy at high risk.
References
- Caprini JA. Thrombosis risk assessment as a guide to quality patient care. Dis Mon. 2005;51(2–3):70–78.
- Bahl V, et al. A validation study of a retrospective venous thromboembolism risk scoring method. Ann Surg. 2010;251(2):344–350.
- Gould MK, et al. Prevention of VTE in nonorthopedic surgical patients. Chest. 2012;141(2 Suppl):e227S–e277S.
- Anderson DR, et al. (ASH 2019). American Society of Hematology 2019 guidelines for management of venous thromboembolism: prevention of venous thromboembolism in surgical hospitalized patients. Blood Adv. 2019;3(23):3898–3944.