What is considered a normal oxygen saturation level in the blood?

A normal oxygen saturation level in the blood is typically considered to be at least 95%, often accepted as 96% or higher in clinical practice. Oxygen saturation represents the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen.

When the oxygen saturation level drops below 90%, it is generally viewed as a sign of potential hypoxemia, which can lead to various complications if not addressed promptly. Levels between 90% and 95% may still be acceptable in some clinical contexts depending on the patient's overall health and specific medical considerations, but a saturation of 96% or higher is ideal for proper physiological function.

Saturation levels can reach 100% under optimal conditions, but it is rare for a healthy person to consistently maintain this exact level. Moreover, saturation levels around 85% are considered compromised and indicative of respiratory issues or inadequate oxygenation. Therefore, while oxygen saturation can vary with specific cases or conditions, maintaining a level of 96% or higher is a key target for ensuring sufficient oxygen delivery to tissues in a healthy individual.