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Stratification of patients based on their risk for developing venous thromboembolism
| Category | Characteristics |
|---|---|
| Low | Age <40 years, no other risk factors, uncomplicated abdominal/thoracic surgery |
| Age >40 years, no other risk factors, minor elective abdominal/thoracic surgery <30 min | |
| Moderate | Age >40 years, abdominal/thoracic surgery >30 min |
| History of recent thromboembolism | |
| High | Abdominal or pelvic procedure for malignancy |
| Major lower extremity orthopaedic procedure |
