| AVDO2 | arteriovenous oxygen saturation difference |
|---|---|
| AVDO2B | arteriovenous oxygen saturation difference, basal |
| FIO2 | forced inspiratory oxygen; fractional concentration of oxygen in inspired gas |
| HO | hand orthosis; heterotopic ossification; high oxygen; hip orthosis; history of; Holt-Oram [syndrome]... |
| O2 | both eyes; diatomic oxygen; molecular oxygen |