Wells probability score for PE
Definition: Pulmonary embolism is an acute disorder characterized by blockage of the main pulmonary arteries or one of its branches caused by an embolism.
Wells score
| Clinically suspected DVT | 3.0 points |
| Alternative Diagnosis is less likely then PE | 3.0 points |
| Tachycardia (heart rate >100) | 1.5 points |
| Immobilization ( >3d ) / surgeery in previous four weeks | 1.5 points |
| History of DVT or PE | 1.5 points |
| Hemoptysis | 1.0 points |
| Malignancy ( with treatment within 6 months ) or Palliative | 1.0 points |
Interpretation:
Traditional interpretation
Score >6.0: High (probability 59% based on pooled data)
Score 2.0 to 6.0: Moderate (probability 29% based on pooled data)
Score <2.0: Low (probability 15% based on pooled data[15])
Alternative interpretation:
Score > 4: PE likely. Consider diagnostic imaging.
Score 4 or less: PE unlikely. Consider D-dimer to rule out PE
