34) ANSWER

A) "Oxygen saturation is only assessed by analyzing the PaO₂."

Explanation

The PaO₂ is not the only determinant used to assess oxygen saturation. Oxygen saturation reflects the total oxygen concentration that is carried on the hemoglobin molecule. There is a relationship observed between the PaO₂ and SaO₂ indicating safe and dangerous levels as the PaO₂ level drops. Options 2, 3, and 4 are consistent with the concept of SaO₂. The critical words are lack of understanding. This is a negative-response question, indicating that three of the options are correct statements. Recognize that options 2, 3, and 4 are true statement about oxygenation and eliminate them.