Wells PE score calculator

Wells Score for PE

Wells' PE Score Calculator

Criteria	No	Yes	Points
Clinical signs and symptoms of DVT (leg swelling, pain with palpation)	1		+3.0
PE is #1 diagnosis OR equally likely	1		+3.0
Heart rate >100 bpm	1		+1.5
Immobilization (≥3 days) OR surgery in previous 4 weeks	1		+1.5
Previous objectively diagnosed PE or DVT	1		+1.5
Hemoptysis	1		+1.0
Malignancy (treatment within 6 months or palliative)	1		+1.0
Wells' Score	points

Three-Tier Model

0–1	Low Risk — 1.3% incidence of PE. Consider D-dimer to rule out. Consider PERC rule.
2–6	Moderate Risk — 16.2% incidence of PE. Consider high-sensitivity D-dimer or CTA.
>6	High Risk — 37.5% incidence of PE. Consider CTA. D-dimer not recommended.

Two-Tier Model (Preferred by guidelines)

0–4	PE Unlikely — 12.1% incidence. Consider high-sensitivity D-dimer; if negative, stop workup.
>4	PE Likely — 37.1% incidence. Consider CTA testing.

References

Wells PS, Anderson DR, Rodger M, et al. Derivation of a simple clinical model to categorize patients probability of pulmonary embolism. Thromb Haemost. 2000;83(3):416-420. PMID 10744147. van Belle A, Büller HR, Huisman MV, et al. Effectiveness of managing suspected pulmonary embolism using an algorithm combining clinical probability, D-dimer testing, and computed tomography. JAMA. 2006;295(2):172-179. PMID 16403929.