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Have a well being skilled choose the test site. To measure blood oxygen with this method, blood should be drawn from an artery. Usually, one in your wrist (the radial artery) is chosen, though blood may also be drawn from an artery in your groin (the femoral artery) or from your arm above the elbow (the brachial artery). X Research source A needle will be used to draw the blood for the pattern. It is possible for you to to take a seat for the procedure, and your arm will likely be extended and can rest on a comfortable floor. The health skilled will really feel your wrist to search out your pulse and to verify the blood circulate of your arteries (a procedure called the Allen take a look at). If you employ an arm for dialysis, or if there is infection or inflammation on the meant test site, another space will likely be used for the arterial blood gasoline test. An artery is chosen for this procedure because it would allow the oxygen to be measured before it enters physique tissues, giving a extra correct studying. If you're presently on oxygen therapy, your doctor may have the oxygen shut off for twenty minutes previous to the test (except you can not breathe without the oxygen) to assist get an accurate reading of your blood oxygen level.
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