pISSN 1738-3544eISSN 2288-1662
pISSN 1738-3544eISSN 2288-1662
pISSN 1738-3544New acceptability criteria
| Detailed criteria | Required for acceptability | |
|---|---|---|
| FEV1 | FVC | |
| Must have BEV ≤5% of FVC or 0.100 L, whichever is greater | ○ | ○ |
| Must have no evidence of a faulty zero-flow setting | ○ | ○ |
| Must have no cough in the first second of expiration | ○ | × |
| Must have no glottic closure in the first second of expiration | ○ | ○ |
| Must have no glottic closure after 1 s of expiration | × | ○ |
| Must achieve one of these two EOFE indicators① Expiratory plateau (≤0.025 L in the last 1 s of expiration)② If not satisfied with ① expiratory time ≥15 s | × | ○ |
| Must have no evidence of obstructed mouthpiece or spirometer | ○ | ○ |
| Must have no evidence of a leak | ○ | ○ |
| FIVC-FVC must be ≤0.100 L or 5% of FVC, whichever is greater | ○ | ○ |
Adopted from Graham et al (Am J Respir Crit Care Med. 2019;200:e70-e88) [15].
Abbreviations: FEV1, forced expiratory volume in one second; FVC, forced vital capacity; BEV, back-extrapolated volume; EOFE, end of forced expiration; FIVC, forced inspiratory vital capacity.
