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[²oxy- + -meter]
An electronic device for determining the percentage of hemoglobin in arterial blood saturated with oxygen. The oximeter is usually attached to the tip of a finger (preferably the index, middle, or ring finger) but may sometimes be placed on a toe (if there is adequate circulation to the foot) or the bridge of the nose, the forehead, or an earlobe.
Descriptive text is not available for this imageThe oximeter should not be so tight that it prevents circulation to the finger, toe, or ear lobe.

Video for Pulse Oximetry

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