EpistemisROX Index for High Flow Nasal Cannula
A single number that predicts whether high flow will work: ratio between saturation relative to FiO₂ and respiratory rate. It is measured 2, 6 and 12 hours after starting it, and its value is in avoiding late intubation.
Required inputs
| Variable | Example value |
|---|---|
| Oxygen saturation by pulse oximetry (%) | 93 |
| Delivered FiO₂ (fraction, 0.21 to 1.0) | 0.5 |
| Respiratory rate (per minute) | 26 |
| Time of measurement from the start of high flow | — |
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
- 4