Interactive Wells' Criteria for Pulmonary Embolism calculator. Requires the calculator gadget.
Usage: {{Wells PE 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.
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