Wells’ score calculator: Pre-test probability of deep vein thrombosis (DVT)
Choose yes OR no among these as per clinical situation !!
|Wells’ score||Risk of DVT on ultrasound|
|Wells’ score of -2 to 0||Low risk of DVT on ultrasound (3%)|
|Wells’ score of 1 or 2||Intermediate risk of DVT (17%)|
|Wells’ score of 3 or More||High risk of DVT (75%)|
As published originally Patients with a Wells’ score of -2 to 0 were at low risk of DVT on ultrasound (3%), those with a score of 1 or 2 were at intermediate risk (17%), and those with a score of 3 or more at high risk (75%). Ref: Wells PS, Anderson DR, Bormanis J, et. al. Value of assessment of pretest probability of deep-vein thrombosis in clinical management. Lancet. 1997 Dec 20-27;350(9094):1795-8.
Incorporating Value of D-dimer the scoring system was modified.
Evaluation of D-dimer in the diagnosis of suspected deep-vein thrombosis. Wells PS et al. N Engl J Med. 2003 Sep 25;349(13):1227-35.
Patients were considered at low risk of DVT if the Wells’ score was < 2 and D-dimmer was negative.