Which of the following is a normal arterial oxygen saturation (SaO2) level?

A normal arterial oxygen saturation (SaO2) level typically ranges from 95% to 100%. This saturation level indicates that the hemoglobin in the blood is effectively carrying oxygen, which is vital for cellular metabolism and overall bodily function. When SaO2 levels fall below this range, it can signal hypoxemia, where tissues may not be receiving adequate oxygen, potentially leading to serious health complications.

In clinical practice, maintaining an SaO2 level above 95% is considered essential to ensure that organs and tissues are receiving sufficient oxygen for optimal functioning. While levels slightly below this, such as 92% or 88%, may be tolerable in certain situations or for specific populations, they generally indicate a need for further evaluation and potential intervention. Thus, 95% serves as a critical benchmark for normal oxygen saturation levels in the context of patient assessment and management.