What does "Oxygen saturation" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
Oxygen saturation is a measure of how much oxygen the blood is carrying compared to the maximum it could carry. It's usually expressed as a percentage. For example, if the oxygen saturation is 95%, this means that the blood is carrying 95% of the maximum amount of oxygen it can hold. This measurement is important because every cell in the body needs oxygen to function properly.
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