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Wells Criteria for DVT
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Table 1. Wells Clinical Score for DVT

    Clinical Parameter Score Score
    Active cancer (treatment ongoing, or within 6 mo or palliative) +1
    Paralysis or recent plaster immobilization of the lower extremities +1
    Recently bedridden for >3 d or major surgery <4 wk +1
    Localized tenderness along the distribution of the deep venous system +1
    Entire leg swelling +1
    Calf swelling >3 cm compared with the asymptomatic leg +1
    Pitting edema (greater in the symptomatic leg) +1
    Previous DVT documented +1
    Collateral superficial veins (nonvaricose) +1
    Alternative diagnosis (as likely or greater than that of DVT) -2
    Total of Above Score
    High probability >3
    Moderate probability 1 or 2
    Low probability <0