| I/E | inspiratory/expiratory [ratio]; internal/external |
|---|---|
| IEL | internal elastic lamina; intraepithelial lymphocyte |
| IF | idiopathic fibroplasia; idiopathic flushing; immersion foot; immunofluorescence; indirect fluorescen... |
| IFM | internal fetal monitor |
| IGS | image-guided surgery; inappropriate gonadotropin secretion; internal guide sequence |