Emergency Medicine · Vascular Medicine · Internal Medicine

Wells Criteria for DVT calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Active cancerParalysis, paresis, or recent plaster immobilizationBedridden >3 days or major surgery within 4 weeksLocalized tenderness along the deep venous systemEntire leg swellingCalf swelling >3 cm vs other legPitting edema confined to the symptomatic legCollateral superficial veins (non-varicose)Alternative diagnosis at least as likely as DVT

Result

Low probability

Consider D-dimer; if negative, DVT is unlikely.

Formula inputs

Active cancer
Paralysis, paresis, or recent plaster immobilization
Bedridden >3 days or major surgery within 4 weeks
Localized tenderness along the deep venous system
Entire leg swelling
Calf swelling >3 cm vs other leg
Pitting edema confined to the symptomatic leg
Collateral superficial veins (non-varicose)
Alternative diagnosis at least as likely as DVT

Primary source

Wells PS et al. Value of assessment of pretest probability of deep-vein thrombosis in clinical management. Lancet (1997)

View source