Determination of oxygenation status by oxygen saturation alone is inadequate.What other value must be known?

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Proper evaluation of the oxygen saturation level is vital.For example, an Sao₂ of 97% means that 97% of the available hemoglobin is bound with oxygen.The word available is essential to evaluating the Sao₂ level because the hemoglobin level is not always within normal limits and oxygen can bind only with what is available.

Determination of Oxygenation Status by Oxygen Saturation Alone Is Inadequate