What range of oxygen saturation is considered normal for a healthy adult?

Oxygen saturation levels are a critical indicator of respiratory function, representing the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. For a healthy adult, the normal range of oxygen saturation is typically considered to be between 95% and 100%. This range reflects optimal oxygen delivery to the tissues and organs, essential for proper metabolic function.

Having an oxygen saturation level at or above 95% means that the majority of hemoglobin is being utilized effectively to transport oxygen, while values approaching 100% indicate near-complete saturation. It is important for healthcare professionals to recognize that values below this range can suggest hypoxemia, which may require intervention.

The other ranges provided fall outside the well-established norms for healthy adults. While they may capture some variation, they do not accurately reflect the standard criteria used in clinical settings for assessing oxygenation in individuals without underlying health conditions. Therefore, understanding that a normal oxygen saturation is recognized as being between 95% and 100% is crucial for evaluating respiratory health.