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Calculator: DVT probability in adults: Wells score system

Calculator: DVT probability in adults: Wells score system

Clinical findings

Paralysis, paresis, or recent orthopedic casting of lower extremity (1 point)

Recently bedridden (more than 3 days) or major surgery within past 4 weeks (1 point)

Localized tenderness in deep vein system (1 point)

Swelling of entire leg (1 point)

Calf swelling 3 cm greater than other leg (measured 10 cm below the tibial tuberosity) (1 point)

Pitting edema greater in the symptomatic leg (1 point)

Collateral non-varicose superficial veins (1 point)

Active cancer or cancer treated within 6 months (1 point)

Alternative diagnosis more likely than DVT (popliteal [Baker's] cyst, cellulitis, muscle damage, superficial venous thrombosis, postthrombotic [postphlebitic] syndrome, inguinal lymphadenopathy, external venous compression) (-2 points)

Important: Inputs must be complete to perform calculation.

Total criteria point count:


DVT risk score interpretation

3 to 8 points: High probability of DVT
1 to 2 points: Moderate probability
-2 to 0 points: Low probability

  • DVT: deep vein thrombosis.

Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

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