What is the optimal oxygen saturation level measured by pulse oximetry?

• A. 90-94%
• B. 95-99%
• C. 100%
• D. 85-89%

Answer: (B)

The optimal oxygen saturation level measured by pulse oximetry falls within the range of 95-99%. This range indicates that the body is receiving an adequate supply of oxygen, which is crucial for maintaining healthy physiological functions. Oxygen saturation levels within this range suggest proper respiratory function and sufficient oxygenation of the blood, ensuring that tissues receive the necessary oxygen for metabolic processes.

Levels below this range may indicate hypoxemia, which could require medical intervention, and sustaining levels above 99% may not provide additional physiological benefits and could be indicative of potential oxygen toxicity, especially in specific clinical settings. Maintaining saturation levels within the 95-99% range is important in patient assessment, particularly in those with respiratory conditions, ensuring that they are not in distress and that their oxygen supply is adequately managed.