Oxygen saturation – better measured than calculated
نویسنده
چکیده
Arterial blood gas analysis, the focus of this article, provides a fuller and more accurate ”gold standard” assessment of blood oxygenation status. It allows generation, not only of oxygen saturation (in arterial blood) sO2(a), but a number of further oxygen-related parameters, including the partial pressure of oxygen in arterial blood, pO2(a) and the total oxygen concentration of arterial blood, ctO2(a). Depending on the blood gas analyzer used, arterial oxygen saturation (sO2(a)) is measured directly by CO-oximetry, or calculated from measured pO2(a).
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