by Ally ParkA Pulse oximeter is a unit that monitors oxygenation of blood by measuring the percentage of haemoglobin saturated with O2. It is attached to the finger or ear lobe and measures the blood flow past a computerized probe in the meter. A sound or graph is usually displayed to show each pulse beat.The oximeter utilizes two wavelengths of light from the probe that is absorbed by haemoglobin. The wavelengths are 650nm and 805nm. The differing amounts of saturation at both wavelengths i

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