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Pulse Oximeters (Pulse Ox)

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Pulse oximetry is a non-invasive method for monitoring a patient's O2 saturation. A sensor is placed on a thin part of the patient's body, usually a fingertip or earlobe, or in the case of an infant, across a foot. Light of two wavelengths is passed through the patient to a photodetector. The changing absorbance at each of the wavelengths is measured, allowing determination of the absorbances due to the pulsing arterial blood alone, excluding venous blood, skin, bone, muscle, fat, and (in most cases) nail polish.[1] With NIRS it is possible to measure both oxygenated and deoxygenated hemoglobin on a peripheral scale (possible on both brain and muscle). Products of this nature are more commonly referred to as Pusle Ox or Pulse Ox Machines.