Score

Wells score for PE

New

Pre-test probability of pulmonary embolism.

Wells (PE)

0.0

≤ 4: PE unlikely (two-tier): D-dimer first

≤ 4: PE unlikely (two-tier): D-dimer first
> 4: PE likely: imaging (CTPA)

Formula

dvt + likely + hr + immob + prior + haemoptysis + cancer

Notes

Boolean inputs contribute their 'points' value when true.

References

  1. Wells PS, et al. Derivation of a simple clinical model to categorize patients probability of pulmonary embolism. Thromb Haemost 2000;83:416-20.

Used in

PE risk stratification and thrombolysis

Calculators support, not replace, clinical judgement. Check inputs and units, and confirm doses with your unit protocol.