Wells' Criteria for DVT

Estimate the pretest probability of deep vein thrombosis.

Clinical Criteria

Active cancer (treatment within 6 months or palliative) (+1)

Paralysis, paresis, or recent leg immobilisation (+1)

Bedridden >3 days or major surgery within 12 weeks (+1)

Localised tenderness along deep venous system (+1)

Entire leg swollen (+1)

Calf swelling >3 cm compared to other leg (+1)

Pitting oedema (greater in symptomatic leg) (+1)

Collateral superficial veins (non-varicose) (+1)

Previously documented DVT (+1)

Alternative diagnosis at least as likely as DVT (-2)

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