| FEV1, | FEV1 forced expiratory volume in one second |
|---|---|
| HFO-A | high-frequency oscillatory [ventilation]-active [expiratory phase] |
| I/E | inspiratory/expiratory [ratio]; internal/external |
| I:E | inspiratory/expiratory [ratio] |
| MEF | maximal expiratory flow; middle ear fluid; midexpiratory flow; migration enhancement factor; mouse e... |