🦵 Wells Score for DVT
Calculate the two-level Wells score for deep vein thrombosis (DVT) pre-test probability.
Wells Score for DVT
Active cancer
Paralysis/paresis or recent immobilisation of leg
Bedridden ≥ 3 days or surgery within 12 weeks
Localised tenderness along deep veins
Entire leg swollen
Calf swelling > 3 cm vs other leg
Pitting oedema (symptomatic leg)
Collateral superficial veins (non-varicose)
Previously documented DVT
Alternative diagnosis as likely or more
When to use
Decide between D-dimer and ultrasound in suspected DVT.
How it works
Sum 9 clinical items (+1 each); subtract 2 if an alternative diagnosis is at least as likely. ≥ 2 = DVT likely, < 2 = unlikely.
Key points
- Unlikely + negative high-sensitivity D-dimer excludes DVT.
- Likely → proximal compression ultrasound.
- The score supports, not replaces, imaging.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.