| SAO2 | oxygen saturation in alveolar gas |
|---|---|
| SaO2 | oxygen saturation in arterial blood |
| Sat, sat | saturation, saturated |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| SjO2 | jugular bulb venous oxygen saturation |