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Pulmonary Embolism Pretest ProbabilityAka: Wells Clinical Prediction Rule for PE

See Also
1. Pulmonary Embolism
Criteria
1. PE more likely than alternatives: 3.0 points
2. Deep Vein Thrombosis (DVT) suspected: 3.0 points
3. Tachycardia (pulse >100 beats per minute): 1.5 points
4. Surgery or immobilization in last 4 weeks: 1.5 points
5. Prior DVT or Pulmonary Embolism: 1.5 points
6. Hemoptysis: 1.0 points
7. Active malignancy: 1.0 points
Interpretation
1. Score 0-2 points: Low PE Probability (3.6% risk)
2. Score 3-6 points: Moderate PE Probability (20.5% risk)
3. Score >6 points: High PE Probability (66.7% risk)
References
1. Wells (2000) Thromb Haemost 83:416

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