Which of the following is considered a normal value for arterial oxygen saturation?

Which of the following is considered a normal value for arterial oxygen saturation?

• A. 85-95%
• B. 90-95%
• C. 95-100%
• D. 100-105%

Answer: (C)

Arterial oxygen saturation, commonly measured by pulse oximetry, indicates the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. A normal arterial oxygen saturation level typically ranges from 95% to 100%. This range is essential for ensuring that tissues and organs receive adequate oxygen for metabolism. Values below 95% can indicate possible hypoxemia, which can lead to various pathological states if oxygen delivery is compromised. Conversely, saturation levels above 100% are physiologically impossible since hemoglobin can only be fully saturated up to a maximum of 100%. Thus, the correct range for normal arterial oxygen saturation reflects the upper and lower bounds of effective oxygen transport within the body.

Arterial oxygen saturation, commonly measured by pulse oximetry, indicates the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. A normal arterial oxygen saturation level typically ranges from 95% to 100%. This range is essential for ensuring that tissues and organs receive adequate oxygen for metabolism.

Values below 95% can indicate possible hypoxemia, which can lead to various pathological states if oxygen delivery is compromised. Conversely, saturation levels above 100% are physiologically impossible since hemoglobin can only be fully saturated up to a maximum of 100%. Thus, the correct range for normal arterial oxygen saturation reflects the upper and lower bounds of effective oxygen transport within the body.