| AOU | apparent oxygen utilization |
|---|---|
| AVDO2 | arteriovenous oxygen saturation difference |
| AVDO2B | arteriovenous oxygen saturation difference, basal |
| AVO2 | arteriovenous oxygen ratio |
| BLB | Baker-Lima-Baker [mask]; Bessey-Lowry-Brock [method or unit]; black light bulb; Boothby-Lovelace-Bul... |