Emergency Medicine

Wells Score for DVT

Pre-test probability of deep vein thrombosis.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use in patients with suspected lower-limb DVT to estimate pre-test probability and guide D-dimer/ultrasound pathways.

Why use

It stratifies risk so investigations are used appropriately.

Advice

A common two-level approach: ≤1 = "DVT unlikely" (proceed to D-dimer); ≥2 = "DVT likely" (proceed to ultrasound). Follow your local pathway.

Evidence & references

Wells PS et al. Evaluation of D-dimer in the diagnosis of suspected deep-vein thrombosis. NEJM. 2003.

About the creator

Wells PS et al.

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