In this video you will learn how to use a pulse oximeter and how does it work.

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There's a small amount of oxygen that's dissolved directly in the blood because oxygen is insoluble in the blood, it has to be carried by something, so its carried by hemoglobin.

Hemoglobin are proteins within the red blood cells and each unit of hemoglobin carries about 4 units of oxygen.

Hemoglobin gives a red color when its saturated with oxygen and when its desaturated it gives a more purple color.

Patrick McKeown will demonstrate little pulse oximeter and its infrared light inside. To use a pulse oximeter you need to put your nail against the red light. The color of hemoglobin that's saturated with oxygen this is picking up on.

So basically the red light is to detect if your hemoglobin is saturated or desaturated.

Normal is 95-99%

If you have your pulse oximeter, the top breathing is the spo2 and that's the saturation of your peripheral arteries with oxygen.
The lower reading is your pulse rate.

Normal Breathing:
How fully loaded are the hemoglobin with oxygen they're almost fully saturated.

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