Normal range for oxygen saturation via pulse oximeter is?

Choice A reason: The range of 89-100% is incorrect because oxygen saturation levels below 90% are generally considered inadequate and indicative of potential hypoxemia. Normal oxygen saturation levels via pulse oximeter typically fall between 95% and 100%. Hence, 89-100% includes a portion of values that are clinically significant and not within the normal range for healthy individuals. Choice B reason: Stating "100%" as the normal range is inaccurate because it does not encompass the lower bounds of normal oxygen saturation levels. While 100% saturation is an ideal state, the normal range for healthy individuals usually spans from 95% to 100%. Thus, specifying only "100%" excludes other values that are still considered normal. Choice C reason: The range of 90-100% is a common misconception, as oxygen saturation levels of 90% are on the borderline of hypoxemia. Clinically, a value of 90% might warrant further investigation, and it falls outside the generally accepted normal range of 95-100%. Therefore, while close, this range is not completely accurate. Choice D reason: The correct range for oxygen saturation via pulse oximeter is indeed 95-100%. This range includes all values considered normal for a healthy individual. Oxygen saturation levels within this range indicate sufficient oxygenation of the blood, which is crucial for the body's physiological functions.