Wells score: pulmonary embolism

Respiratory & VTE

Pre-test probability for PE. 'PE unlikely' with a negative D-dimer ends the workup without a CT.

What you enter

Clinical signs of DVT (+3)
PE is the most likely diagnosis (+3)
Heart rate >100 (+1.5)
Immobilisation ≥3 days or surgery in the last 4 weeks (+1.5)
Previous DVT / PE (+1.5)
Haemoptysis (+1)
Active malignancy (+1)

FORMULADVT signs 3 · PE most likely 3 · HR >100 1.5 · immobilisation/surgery 1.5 · previous VTE 1.5 · haemoptysis 1 · cancer 1; two-tier cut-off >4

SourceWells PS et al. Excluding pulmonary embolism at the bedside without diagnostic imaging. Ann Intern Med 2001;135:98-107ReviewedFormula and thresholds checked against the source on 2026-08-22. If the source updates, this line will say so.