Suspected PE work-up
1
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Outcome
Step 1
Wells score
Pre-test probability of pulmonary embolism (Wells 2000).
Tap everything that applies.
Clinical signs of DVT
Leg swelling and pain on deep-vein palpation
+3
PE is the most likely diagnosis
+3
Heart rate > 100/min
+1.5
Immobilisation or surgery in past 4 weeks
+1.5
Previous DVT or PE
+1.5
Haemoptysis
+1
Malignancy
On treatment, treated in past 6 months, or palliative
+1
None apply — continue (Wells 0 (PE unlikely))