What is the normal range for arterial oxygen saturation (SPO2)?

The correct answer indicates that the normal range for arterial oxygen saturation (SPO2) is between 95-100%. This range signifies that the oxygen saturation levels in the blood are optimal, allowing for sufficient oxygen delivery to tissues and organs. Maintaining an SPO2 level within this range is crucial for ensuring proper physiological functioning, as levels below this may indicate hypoxemia, which could require medical intervention.

Other options provide ranges that include lower saturation levels, which could reflect less than ideal oxygenation. While options suggesting slightly lower thresholds may still be acceptable in some clinical contexts, they do not accurately represent the standard normal range agreed upon by health authorities for optimal oxygenation.