Arizona Certified Nursing Assistant (CNA) Practice Test

What is the range of normal blood oxygen saturation for most residents?

1. 90% to 95%

2. 92% to 98%

3. 95% to 100%

4. 88% to 94%

The correct answer is: 95% to 100%

The range of normal blood oxygen saturation for most residents is typically considered to be between 95% and 100%. This range indicates that the body's hemoglobin is effectively saturated with oxygen, which is essential for optimal cellular function and overall health. Values below 95% may suggest hypoxemia, which requires further evaluation and potentially increased medical intervention. Blood oxygen saturation levels are usually measured using a pulse oximeter, a non-invasive device that reflects how well oxygen is being transported throughout the body. Levels consistently below this range can indicate respiratory issues, heart problems, or other underlying medical conditions. The other ranges provided do not represent the accepted norms for healthy individuals. For instance, saturation levels lower than 95% may raise concern, as this could signify a need for medical attention. Maintaining blood oxygen saturation within the range of 95% to 100% is crucial for ensuring that the body’s organs and tissues receive sufficient oxygen for optimal functioning.