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How quickly does nasal high flow work?

Evidence shows that when NHF is applied early enough (in patients who respond to therapy), you should see improvement in oxygenation, RR, and dyspnea within 15-30 mins. Monitoring should continue beyond this, of course.

The recent addition of the ROX index, calculated from 3 data points collected at the bedside, can provide an indicator of NHF outcome in the first few hours of treatment and beyond.

Please read about the ROX index and the educational tools available (2 mobile apps) in our dedicated edition of Flow Matters.

How quickly does Optiflow Nasal High Flow work?

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