|Active cancer (treatment ongoing, administered within 6 months or palliative)||+1|
|Paralysis, paresis or recent plaster immobilization of the lower extremities||+1|
|Recently bedridden for >3 d or major surgery <12 wk||+1|
|Localized tenderness along the distribution of the deep venous system||+1|
|Swelling of entire leg||+1|
|Calf swelling >3 cm larger than asymptomatic side (10cm below tibial tuberosity)||+1|
|Pitting oedema confined to the symptomatic leg||+1|
|Collateral superficial veins (nonvaricose)||+1|
|Previously documented DVT||+1|
|Alternative diagnosis at least as likely as DVT||-2|
| || |
|High probability (PPV 53%)||>=3|
|Moderate probability (PPV 17%)||1 or 2|
|Low probability (PPV 5%)||<=0|
Wells PS, Anderson DR, et al.
Excluding pulmonary embolism at the bedside without diagnostic imaging: Management of patients with suspected pulmonary embolism presenting to the emergency department by using a simple clinical model and D-dimer.
Annals Intern Med 2001;135:98-107.
Wells PS, Owen C, Doucette S, Fergusson D, Tran H.
Does this patient have deep vein thrombosis?
JAMA. 2006 Jan 11;295(2):199-207.
Richard Pearson 2014