For clinical reference only — does not replace local trust guidelines or clinical judgement.
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Wells Score (PE)
Pulmonary embolism risk
Calculator
Clinical signs of DVT
+3
PE is the most likely diagnosis
+3
Heart rate > 100
+1.5
Immobilisation ≥ 3 d or surgery in past 4 wk
+1.5
Previous DVT / PE
+1.5
Haemoptysis
+1
Active malignancy (treatment within 6 mo)
+1
Interpretation
Score
0
PE unlikely
PE unlikely (≤4). Check D-dimer — if negative, PE excluded. If positive, proceed to CTPA.
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