Question

When you are administering mouth-to-mask ventilations without supplemental oxygen, approximately how much oxygen are you providing for the nonrebreathing patient?

1) 16
2) 18
3) 20
4) 21

Answer 1

When administering mouth-to-mask ventilations without supplemental oxygen, you are providing the patient with approximately 21% oxygen, which is the concentration of oxygen in the ambient air.

Step-by-step explanation:

When you are administering mouth-to-mask ventilations without supplemental oxygen, you are providing the patient with the same concentration of oxygen that is present in the ambient air, which is approximately 21% oxygen. So the correct answer is 4) 21. It is important to remember that when providing rescue breaths, the oxygen concentration is somewhat diluted with carbon dioxide from the rescuer's exhaled air, but the primary component is still room air oxygen.