ToolsCalculators
Wells score for deep vein thrombosis
Pre-test probability of lower-limb deep vein thrombosis.
Wells score for deep vein thrombosis
Active cancer
Paralysis, paresis or recent immobilisation of the leg
Bedridden >3 days or major surgery within 12 weeks
Localised tenderness along the deep venous system
Entire leg swollen
Calf swelling >3 cm vs the other leg
Pitting oedema confined to the symptomatic leg
Collateral superficial (non-varicose) veins
Previously documented DVT
Alternative diagnosis at least as likely
Result0 points
DVT unlikely — a negative D-dimer safely excludes DVT.
- Two-tier
- DVT unlikely
When to use
- Patients with suspected lower-limb DVT.
Formula
One point for each positive criterion; subtract 2 points if an alternative diagnosis is at least as likely.