Emergency Stretcher
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Pulse Oximeter
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pulse oximetry
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The principle of pulse oximetry was developed by Nihon Kohden researcher Takuo Aoyagi in the early 1970’s. Pulse oximetry measures blood oxygen saturation (SpO2) noninvasively with an infrared sensor on the fingertip. Before that, the measurement of blood oxygen saturation required arterial blood sampling. Thanks to pulse oximetry, the critical parameter of SpO2 can be measured painlessly, continuously and in real time.