Wells' Criteria for Deep Vein Thrombosis
Cardiology specialty tool
Bedside Tool Interface Configuration
Grades active pre-test clinical probability of DVT to direct ultrasound staging decisions.
Algorithm Checklist Parameters:
- Active Cancer (past 6 mo or palliative)
- Paralysis or plaster immobilization of lower limb
- Recently bedridden ≥ 3 days or major surgery past 12 weeks
- Localized tenderness along deep vein systems
- Entire leg swollen
- Calf swelling ≥ 3cm compared to other side
- Pitting edema confined to symptomatic leg
- Collateral non-varicose superficial veins
- Prior history of documented DVT
- Alternative diagnosis is at least as likely as DVT (-2 points)
Primary Clinical Application:
Guide testing (D-dimer vs venous duplex ultrasound) of suspected lower extremity DVT.