Pulse oximetry | 合法醫療器材資訊網

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Measurement of blood oxygen saturation

Tetherless pulse oximetry

Pulse oximetry is a noninvasive method for monitoring a persons blood oxygen saturation. Peripheral oxygen saturation (SpO2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (SaO2) from arterial blood gas analysis.[1] But the two are correlated well enough that the safe, convenient, noninvasive, inexpensive pulse oximetry method is valuable for measuring oxygen saturation in clinical use.[citation needed]

The most common approach is transmissive pulse oximetry. In...