PESI Score Calculator (Pulmonary Embolism Severity Index)
Stratify mortality risk in patients with Pulmonary Embolism (PE). Calculates original PESI and Simplified PESI (sPESI) scores for outpatient management decisions.
About
The Pulmonary Embolism Severity Index (PESI) is a validated clinical prognostic rule used to estimate the 30-day mortality risk for patients diagnosed with acute pulmonary embolism (PE). Its primary clinical utility lies in identifying low-risk patients (Class I or II) who may be eligible for outpatient management or early discharge, thereby reducing hospital admissions and healthcare costs.
This tool offers both the original PESI score (which uses granular scoring) and the Simplified PESI (sPESI) (which uses a binary approach). Accurate risk stratification prevents both the overtreatment of stable patients and the undertreatment of those at high risk for rapid decompensation.
Formulas
The PESI score is an additive model summing demographic and clinical variables:
Specific point allocations are:
Reference Data
| Risk Class | Total Points (PESI) | 30-Day Mortality Risk | Recommendation |
|---|---|---|---|
| Class I | ≤ 65 | Very Low (0-1.6%) | Outpatient eligible |
| Class II | 66 - 85 | Low (1.7-3.5%) | Consider early discharge |
| Class III | 86 - 105 | Moderate (3.2-7.1%) | Inpatient admission |
| Class IV | 106 - 125 | High (4.0-11.4%) | Inpatient / Monitoring |
| Class V | > 125 | Very High (10.0-24.5%) | ICU / Hemodynamic support |