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Wells Score for DVT

Pre-test probability of deep vein thrombosis using Wells criteria.

Active cancer (treatment within 6 months or palliative)+1Paralysis, paresis or recent plaster immobilization of lower extremity+1Recently bedridden ≥3 days or major surgery within 12 weeks+1Localized tenderness along deep venous system+1Entire leg swollen+1Calf swelling >3 cm compared to asymptomatic side+1Pitting edema confined to symptomatic leg+1Collateral (nonvaricose) superficial veins+1Previously documented DVT+1Alternative diagnosis at least as likely–2

About this calculator

Wells criteria stratify DVT risk as low, moderate, or high. D-dimer testing is sufficient at low probability; ultrasound is indicated at moderate to high probability.

Source

Wells PS et al. Evaluation of D-dimer in the diagnosis of suspected deep-vein thrombosis. N Engl J Med. 2003;349(13):1227-1235.

Formula version: wells-2003-v1

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