What is the normal range for oxygen saturation in adults?

The normal range for oxygen saturation in adults is typically considered to be between 95% to 100%. This range indicates that the blood is well-saturated with oxygen, which is essential for proper cellular function and overall health. Values within this range signify that oxygen is being effectively transported by hemoglobin in the blood to various tissues and organs in the body.

When oxygen saturation falls below 90%, it indicates hypoxemia, which is a condition where there is insufficient oxygen in the blood, potentially leading to various health complications. Therefore, maintaining oxygen saturation within the normal range is critical for individuals, especially those with respiratory or cardiovascular issues.

The options presenting ranges outside of 95% to 100% either suggest lower values, which could indicate a problem, or are too restricted, not reflecting the widely accepted standards for normal oxygen saturation levels.