The abbreviation used to record oxygen saturation as measured by a pulse oximeter is

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The abbreviation used to record oxygen saturation as measured by a pulse oximeter is SpO₂, which stands for "peripheral capillary oxygen saturation." SaO₂ stands for "arterial oxygen saturation," which is measured by a blood gas analysis. PCO₂ stands for "partial pressure of carbon dioxide," and PO₂ stands for "partial pressure of oxygen," both of which are also measured in a blood gas analysis.

The Abbreviation Used to Record Oxygen Saturation as Measured by a Pulse