A pulse oximeter is a handy medical device that uses two frequencies of light – red and infrared – to determine the percentage of hemoglobin in the blood that is saturated with oxygen, otherwise known as your oxygen saturation level (O2 sat level).[1] If you have ever been in a doctor’s office and heard your […] View Article The R form does not require a high pO2 to allow oxygen binding. By the time blood exits the pulmonary circulation, hemoglobin is 100% saturated with oxygen (four molecules bound). In normal lungs, hemoglobin molecules become close to 100% saturated with oxygen long before the end of the capillary bed, about a third of the way along.
Many different sources note that normal oxygen saturation for healthy people is 95% or higher. Oxygen saturation below 90% or other sources 88%, is considered low. What possible symptoms or impact on the body could be happening as a result of having an oxygen saturation between the normal and low levels.
Normal adult blood oxygen saturation is 96%-100% The air around us contains 21% oxygen at sea level. So speaking in terms of 63% oxygen in the air then survival would not be a problem as this
A pulse oximetry test uses a sensor placed on your fingertip or earlobe to measure your oxygen saturation. For someone who’s healthy, the normal blood oxygen saturation level will be 95–100%. If yours is 92% or less when you are resting, you should be referred for an assessment to see if supplementary oxygen is appropriate.

Comment. All too often, a patient's oxygen saturation is maintained at 100%. This is not only unnecessary but also probably harmful. It should become part of our practice to turn down the supplemental oxygen until we see oxygen saturations no higher than 95% for most patients and to stop oxygen use as soon as it is not needed.

Oxygen saturation is an essential element in the management and understanding of patient care. Oxygen is tightly regulated within the body because hypoxemia can lead to many acute adverse effects on individual organ systems. These include the brain, heart, and kidneys. Oxygen saturation measures how much hemoglobin is currently bound to oxygen
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    • is 100 oxygen saturation bad