What is o2 saturation?

Answer:
In medicine it refers to the percent O2 attached to (arterial) hemoglobin as a comparison to the maximum that could be attached.
In a healthy person the blood leaving the lungs (and/or the left ventricle) should be 100% (or not less than 99%).
First answer by Johnellishartford. Last edit by Johnellishartford. Contributor trust: 702 [recommend contributor recommended]. Question popularity: 1 [recommend question].