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) | 65 |
| Sex | — |
| Resident in long-term care facility (nursing home) | — |
| Active neoplasia | — |
| Hepatopathy | — |
| Congestive heart failure | — |
| Cerebrovascular disease | — |
| Nephropathy | — |
| Altered mental status | — |
| Respiratory rate of 30 breaths per minute or more | — |
| Systolic pressure less than 90 mmHg | — |
| Temperature < 35 °C or ≥ 40 °C | — |
| Heart rate of 125 bpm or more | — |
| arterial pH less than 7.35 | — |
| Urea nitrogen ≥ 30 mg/dL (urea ≥ 64 mg/dL) | — |
| Sodium less than 130 mEq/L | — |
| Glucose 250 mg/dL or more | — |
| Hematocrit less than 30% | — |
| PaO₂ < 60 mmHg or saturation < 90% | — |
| Pleural effusion on 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
- Variables
- 20