| NOTT | nocturnal oxygen therapy trial |
|---|---|
| O2a | oxygen availability |
| OAP | Office of Adolescent Pregnancy; old age pension, old age pensioner; ophthalmic artery pressure; oste... |
| OC | obstetrical conjugate; occlusocervical; office call; on call; only child; optic chiasma; oral contra... |
| O2cap | oxygen capacity |
| rCMRO(2) | regional cerebral metabolic rate of oxygen |
|---|---|
| rOEF | regional oxygen extraction fraction |
| rSO2 | regional oxygen saturation |