Oxygen Saturation (SpO2)
- Heart health
- Blood health
Learn what Oxygen Saturation (SpO2) measures and how it fits into your health data.
What is Oxygen Saturation (SpO2)?
Oxygen Saturation (SpO2) measures the percentage of hemoglobin binding sites occupied by oxygen. It is a critical vital sign for assessing respiratory function. Normal SpO2 is 95-100%. Values below 90% indicate hypoxemia requiring medical attention. Measured by pulse oximetry (SpO2) or arterial blood gas (SaO2).
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