Pulmonary Embolism Severity Index (PESI) Score
| Predictors | Points |
|---|---|
| Age | +1 per year |
| Male sex | +10 |
| Heart failure | +10 |
| Chronic lung disease | +10 |
| Temperature <36°C | +20 |
| Arterial oxygen saturation <90% | +20 |
| Respiratory rate >30/min | +20 |
| Pulse rate >110/min | +20 |
| Systolic BP <100 mmHg | +30 |
| Active cancer | +30 |
| Altered mental status | +60 |
| PESI score (total no. of points) | Risk class | 30 day mortality rate |
|---|---|---|
| ≤65 | I | 0–1.6% |
| 66–85 | II | 1.7–3.5% |
| 86–105 | III | 3.2–7.1% |
| 106–125 | IV | 4.0–11.4% |
| >125 | V | 10.0–24.5% |
In the stable non-pregnant patient with PESI risk class I or II, ambulatory care may be appropriate, depending on locally-agreed protocols.