What is the expected range for SaO2 in a healthy adult?

In healthy adults, the expected range for arterial oxygen saturation (SaO2) is typically between 95% and 100%. This range indicates that the hemoglobin in the blood is adequately saturated with oxygen, reflecting normal respiratory function and sufficient oxygen being delivered to the body's tissues.

A saturation level below 95% might suggest that the body isn't getting enough oxygen, which could be a sign of various medical conditions or respiratory issues. Conversely, a saturation higher than 100% is physiologically impossible, as this would imply that hemoglobin is carrying more oxygen than its maximum capacity. Thus, option C accurately represents the normal, healthy levels of SaO2 in adults.