Clinical Study
Utilization of CT Pulmonary Angiography in Suspected Pulmonary Embolism in a Major Urban Emergency Department
Table 1
Wells’ simplified clinical prediction model.
| Parameter | Points |
| Clinical symptoms or signs of deep vein thrombosis (DVT) | 3 | Heart rate > 100 beats per minute | 1.5 | Immobilization (for 3 or more days) or surgery in the last 4 weeks | 1.5 | Previous history of DVT or PE | 1.5 | Hemoptysis | 1 | Malignancy (diagnosed in the last 6 months, under active or palliative treatment) | 1 | Alternative diagnosis less likely than PE (based on presenting history, physical examination, CXR, EKG, and ABG) | 3 |
| Clinical probability of PE | Score |
| Low | <2 | Moderate | 2–6 | High | >6 |
|
|