Hypopnoea scoring criteria
| Hypopnoea scoring criteria* | |
|---|---|
| a. Drop of nasal pressure excursion of at least 30% from baseline andb. Duration of at least 10 s and | |
| PM-AHI1 | c. Oxygen desaturation of at least 3% |
| PM-AHI2 | c. Oxygen desaturation of at least 3% and/or PWA drop of 30% from baseline |
| PM-AHI3 | c. Oxygen desaturation of at least 4% |
| PM-AHI4 | c. Oxygen desaturation of at least 4% and/or PWA drop of 30% from baseline |
*Scoring of a hypopnoea requires the presence of criteria (a) and (b) in association with either (c) and/or (d).
PM-AHI, portable monitor apnoea–hypopnoea index; PWA, pulse-wave amplitude.