Clinical Model of Wells et al for Deep Vein Thrombosis

Clinical Feature

Points

active cancer (ongoing therapy, palliative therapy, treatment within prior 6 months)

1

paralysis, paresis or recent cast immobilization of the leg or foot

1

recent bed rest for > 3 days, major surgery within past 4 weeks, or both

1

localized tenderness along the distribution of the deep venous system

1

entire leg swollen (swelling of thigh and calf)

1

swelling of calf to 3 cm greater than that of the asymptomatic side (measured 10 cm below tibial tuberosisty)

1

pitting edema (greater in symptomatic leg)

1

dilated superficial veins (non-varicose) in symptomatic leg only

1

alternative diagnosis as likely or greater than that of deep vein thrombosis

-2

Score

Interpretation

-2, -1 or 0

low

1 or 2

moderate

> =3

high