Normal Reference Ranges
Adult
95 - 100 %
Pediatric
95 - 100 %
Clinical Significance
The percentage of hemoglobin binding sites occupied by oxygen. Crucial for assessing oxygen delivery to tissues.
Causes of High
- Supplemental oxygen therapy
Causes of Low
- Hypoxemia (Pneumonia, ARDS, PE)
- Carbon monoxide poisoning (falsely normal on pulse ox, but true SaO2 is low)