What is the normal range of SpO2 levels in healthy adults?

The typical normal range for SpO2 levels in healthy adults is between 95% and 100%. This measurement indicates the percentage of hemoglobin molecules in the blood that are saturated with oxygen, which is crucial for assessing a person's respiratory efficiency and overall oxygen delivery to tissues. Values within this range signify that the body is adequately oxygenating the blood, ensuring that organs and tissues function optimally.

When levels fall below 95%, it may signal potential respiratory issues or other health concerns. An SpO2 reading above 100% is not physiologically possible under normal circumstances, as it exceeds the total saturation capacity of hemoglobin with oxygen. Therefore, the correct range reflects what's considered healthy for individuals without respiratory or cardiovascular impairments.