What is the normal range for SaO2 levels in a healthy adult?

The normal range for SaO2 (arterial oxygen saturation) levels in a healthy adult is indeed between 95% and 100%. This range indicates that the hemoglobin in the blood is sufficiently saturated with oxygen, which is crucial for effective cellular respiration and overall bodily function.

Maintaining SaO2 levels within this range ensures that adequate oxygen is delivered to tissues and organs throughout the body. Levels below 95% can indicate potential hypoxemia, where the body may not be receiving enough oxygen, leading to various health complications. Thus, having a well-oxygenated blood supply is essential for the proper functioning of the cardiovascular and respiratory systems, along with overall health.

The other ranges provided do not accurately reflect the typical physiological state of a healthy adult. For instance, levels as low as 90% or below may suggest a need for medical evaluation, while any percentage below 80% usually indicates severe hypoxemia requiring immediate intervention. Therefore, recognizing 95-100% as the standard range is vital for healthcare assessments and patient monitoring.