Canadian Red Cross Basic Life Support (BLS) Practice Test

A normal SpO2 (peripheral capillary oxygen saturation) level is considered to be in the range of 95-100%. This percentage reflects the amount of oxygen being carried in the blood relative to the total capacity of hemoglobin to bind oxygen. Levels within this range indicate that the respiratory and circulatory systems are functioning effectively, allowing for adequate oxygen delivery to the body’s tissues. Values below 95% can signify hypoxemia, which might suggest a deficiency of oxygen in the blood, and levels above 100% are physiologically impossible and indicate a measurement error or an issue with the monitoring device. Therefore, maintaining the SpO2 in the range of 95-100% is critical for ensuring good health and preventing complications associated with insufficient oxygenation.