What is the typical arterial oxygen saturation target in a healthy adult?

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What is the typical arterial oxygen saturation target in a healthy adult?

Oxygen saturation reflects how fully hemoglobin is loaded with oxygen. In a healthy adult breathing normal air, SpO2 is normally in the high 90s to 100%—typically about 95–100%. This range maps to a normal arterial partial pressure of oxygen (PaO2) around 80–100 mmHg, meaning tissues receive adequate oxygen without excess supplementation. So the best target is roughly 95–100% because it represents normal oxygenation in a healthy person. Values below about 92% indicate hypoxemia and potential insufficient tissue oxygen delivery, while the mid-90s to low-100s are simply normal variation; there’s no need to push beyond this in a healthy individual.

Oxygen saturation reflects how fully hemoglobin is loaded with oxygen. In a healthy adult breathing normal air, SpO2 is normally in the high 90s to 100%—typically about 95–100%. This range maps to a normal arterial partial pressure of oxygen (PaO2) around 80–100 mmHg, meaning tissues receive adequate oxygen without excess supplementation. So the best target is roughly 95–100% because it represents normal oxygenation in a healthy person. Values below about 92% indicate hypoxemia and potential insufficient tissue oxygen delivery, while the mid-90s to low-100s are simply normal variation; there’s no need to push beyond this in a healthy individual.

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