What is the oxygen saturation corresponding to a PaO2 of 80 mmHg?

To determine the oxygen saturation corresponding to a partial pressure of oxygen (PaO2) of 80 mmHg, it is essential to refer to the oxyhemoglobin dissociation curve, which illustrates the relationship between PaO2 and oxygen saturation (SaO2).

At a PaO2 of approximately 80 mmHg, the typical oxygen saturation is usually around 95-98%. This level is within the range considered normal for healthy individuals. The oxygen saturation indicates how much oxygen the hemoglobin in the blood is carrying compared to its capacity, and values significantly lower than this could indicate hypoxemia.

The choices provided include values that are significantly lower than the expected saturation at this pressure, making them less relevant to the context of a PaO2 of 80 mmHg. Hence, the saturation corresponding to a PaO2 of 80 mmHg is represented accurately with a saturation of around 95-98%, which can be rounded to represent a saturation level near 100%.