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Wells Clinical Prediction Rule for Deep Vein Thrombosis (DVT)

Clinical feature /   Points

Active cancer (treatment within 6 months, or palliation)  (Points: 1 )
Paralysis, paresis, or immobilization of lower extremity  (Points: 1 )
Bedridden for more than 3 days because of surgery (within 4 weeks)  (Points: 1 )
Localized tenderness along distribution of deep veins  (Points: 1 )
Entire leg swollen  (Points: 1 )
Unilateral calf swelling of greater than 3 cm (below tibial tuberosity)  (Points: 2 )
Unilateral pitting edema  (Points: 1 )
Collateral superficial veins  (Points: 1 )
Alternative diagnosis as likely as or more likely than DVT  (Points: -2 )


[1 ] Ramzi DW, Leeper KV. DVT and Pulmonary Embolism: Part I. Diagnosis. Am Fam Physician. 2004 Jun 15;69(12):2829-2836

[2 ] Ramzi DW, Leeper KV. DVT and pulmonary embolism: Part II. Treatment and prevention. Am Fam Physician. 2004;69:2841-8

[3 ] Wells PS, Anderson DR, Bormanis J, Guy F, Mitchell M, Gray L, et al. Value of assessment of pretest probability of deep-vein thrombosis in clinical management. Lancet 1997;350:1796.


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