Can be applied for patients whose clinical presentation is concerning for a DVT in order to risk stratify.
Active cancer (<6 mo) (1pt)
Paralysis, paresis, or immobility of extremity (1pt)
Bedridden >3 days because of symptoms within 4 weeks (1pt)
TTP along deep venous system (1pt)
Entire leg swollen (1pt)
Unilateral calf swelling >3cm below tibial tuberosity (1pt)
Unilateral pitting edema (1pt)
Collateral superficial veins, not varicose (1pt)
Previously documented DVT (1pt)
Alternative diagnosis as likely or more likely than DVT (-2pts)<unk> ng:
A<unk>  of 0 or lower → minimal risk - DVT prevalence of 5%. D-dimer testing is safe in this group - negative d-dimer decreases the probability of disease to <1% allowing an ultrasound to be deferred.
A<unk>  of 1-2 → moderate risk - DVT prevalence of 17%. D-dimer testing still effective and a negative test decreases post-test probability disease to <1%
A<unk>  of 3 or higher → high risk - DVT prevalence of 17-53% → patients should receive an ultrasound
Modified Wells Score
Age adjusted D-dimer
D-dimer
ACS - Risk Stratification
Bubble study
Glasgow-Blatchford Bleeding Score
Ottawa ankle rules
SAD PERSONS score