Clinical Decision-Making
Caprini VTE Risk Score: Surgical Thromboprophylaxis Guide
The Caprini Risk Assessment Model (RAM) stratifies perioperative VTE risk using 40+ patient- and procedure-specific factors. Caprini 0 = very low; 1–2 = low; 3–4 = moderate; ≥5 = high. VTE is preventable — the Caprini score turns 'should we prophylax?' into a data-driven decision.
TL;DR: The Caprini Risk Assessment Model (RAM) stratifies perioperative VTE risk using 40+ patient- and procedure-specific factors. Caprini 0 = very low (no prophylaxis beyond ambulation); Caprini 1–2 = low (mechanical or pharmacological); Caprini 3–4 = moderate (pharmacological); Caprini ≥5 = high (pharmacological ± mechanical). Cancer surgery, trauma, and age ≥75 produce the highest scores and warrant extended prophylaxis. VTE is preventable — the Caprini score turns "should we prophylax?" into a data-driven decision.
The Preventable Harm Problem
Hospital-acquired venous thromboembolism — deep vein thrombosis (DVT) and pulmonary embolism (PE) — is the leading preventable cause of in-hospital death. In the US, an estimated 100,000–180,000 patients die annually from PE.
Caprini Score Calculation
Points are assigned for each risk factor present. Scores are additive.
1 Point Each
- Age 41–60 years
- Minor surgery planned
- BMI >25 kg/m²
- Swollen legs (current)
- Varicose veins
- Pregnancy or postpartum (≤1 month)
- Oral contraceptives or hormone replacement therapy
- Sepsis (within 1 month)
- Serious lung disease including pneumonia (within 1 month)
- Acute MI
- Congestive heart failure (within 1 month)
- History of inflammatory bowel disease
- Medical patient currently at bed rest
2 Points Each
- Age 61–74 years
- Arthroscopic surgery
- Malignancy (present or previous)
- Major surgery (>45 minutes)
- Laparoscopic surgery (>45 minutes)
- Patient confined to bed (>72 hours)
- Central venous access
3 Points Each
- Age ≥75 years
- History of DVT/PE
- Family history of thrombosis
- Positive Factor V Leiden
- Heparin-induced thrombocytopenia (HIT)
- Other congenital or acquired thrombophilia
5 Points Each
- Stroke (within 1 month)
- Elective arthroplasty
- Hip, pelvis, or leg fracture (within 1 month)
- Acute spinal cord injury (within 1 month)
Risk Categories and Prophylaxis Recommendations
| Caprini Score | Risk Level | Estimated 30-day VTE Rate | Recommended Prophylaxis |
|---|---|---|---|
| 0 | Very low | <0.5% | Early ambulation only |
| 1–2 | Low | ~1.5% | Mechanical OR pharmacological |
| 3–4 | Moderate | ~3% | Pharmacological prophylaxis |
| ≥5 | High | ≥6% | Pharmacological + consider mechanical |
| ≥7–9 | Very high | 10–20%+ | Pharmacological + mechanical; extended prophylaxis |
Evidence and Guidelines
- Bartlett MA, et al. Mayo Clin Proc. 2020;95(12):2775–2798. PMID: 33276846.
- Hayssen H, et al. J Vasc Surg Venous Lymphat Disord. 2022;10(6):1401–1409. PMID: 35926802.
- Lobastov K, et al. Ann Surg. 2023;277(6):929–937. PMID: 36912040.
- Caprini JA. Dis Mon. 2005;51(2–3):70–78. PMID: 15900257.
References
- Bartlett MA, et al. Mayo Clin Proc. 2020;95(12):2775–2798.
- Hayssen H, et al. J Vasc Surg Venous Lymphat Disord. 2022;10(6):1401–1409.
- Lobastov K, et al. Ann Surg. 2023;277(6):929–937.
- Caprini JA. Dis Mon. 2005;51(2–3):70–78.