EpistemisPneumonia Severity Index (PSI / PORT)
Twenty variables that divide community-acquired pneumonia into five risk classes. It is more laborious than CURB-65 but much better at identifying low-risk patients who can go home: that is its value.
Required inputs
| Variable | Example value |
|---|---|
| Age (years) | — |
| Sex | — |
| Resident of a long-term care facility (nursing home) | — |
| Active neoplasm | — |
| Hepatopathy | — |
| Congestive heart failure | — |
| Cerebrovascular disease | — |
| Kidney disease | — |
| Alteration of mental status | — |
| Respiratory rate of 30 per minute or higher | — |
| Systolic pressure below 90 mmHg | — |
| Temperature < 35 °C or ≥ 40 °C | — |
| Heart rate of 125 bpm or higher | — |
| Arterial pH below 7.35 | — |
| Urea nitrogen ≥ 30 mg/dL (urea ≥ 64 mg/dL) | — |
| Sodium below 130 mEq/L | — |
| Glucose of 250 mg/dL or higher | — |
| Hematocrit below 30% | — |
| PaO₂ < 60 mmHg or saturation < 90% | — |
| Pleural effusion on chest X-ray | — |
Run the calculation in the app
This page explains the score but does not run it. In Epistemis, the calculator validates units, flags values outside physiological ranges, and provides the interpretation that a number alone cannot convey.
Epistemis is educational review material. It is not a medical device, does not diagnose or prescribe treatment, and does not replace formal medical training, current clinical guidelines, or professional clinical judgment.
- Specialty
- Pneumology and Respiratory
- Area
- Internal Medicine
- Variable phases
- 20