What is the normal arterial oxygen saturation range (SpO2) for healthy individuals?

What is the normal arterial oxygen saturation range (SpO2) for healthy individuals?

• A. 94-100%
• B. 90-92%
• C. 96-98%
• D. 92-96%

Answer: (A)

SpO2 is the percentage of hemoglobin carrying oxygen in arterial blood. In healthy adults at sea level, this oxygen saturation is normally in the mid-to-high 90s up to 100%. Allowing for small pulse oximeter variation and normal physiological fluctuation, a range of 94-100% is commonly regarded as normal. Values below about 90% indicate hypoxemia and need evaluation. The other ranges either start too low to be considered normal or include lower values that would be borderline or abnormal for a healthy person.

SpO2 is the percentage of hemoglobin carrying oxygen in arterial blood. In healthy adults at sea level, this oxygen saturation is normally in the mid-to-high 90s up to 100%. Allowing for small pulse oximeter variation and normal physiological fluctuation, a range of 94-100% is commonly regarded as normal. Values below about 90% indicate hypoxemia and need evaluation. The other ranges either start too low to be considered normal or include lower values that would be borderline or abnormal for a healthy person.