ROX index for high-flow nasal cannula
Predicts need for intubation in patients on high-flow nasal oxygen.
Inputs
0 of 3%
%
/min
When to use
- At 2, 6, and 12 hours of high-flow therapy.
Pearls and pitfalls
- 4.88 or higher at 2, 6, or 12 h: lower risk of intubation.
- Below 2.85 (2 h), 3.47 (6 h), or 3.85 (12 h): high risk; consider intubation.
Why use
Avoids delayed intubation.
ROX = (SpO₂ ÷ FiO₂) ÷ respiratory rate