What percentage of oxygen can a nonrebreather mask potentially deliver?

A nonrebreather mask is designed to deliver a high concentration of oxygen to patients who are experiencing severe respiratory distress or hypoxia. It can potentially deliver between 80-100% oxygen when used correctly. The mask features a reservoir bag that stores a significant volume of oxygen, allowing for a concentrated flow to the patient. As the patient inhales, the bag fills with oxygen, enabling high levels of oxygen delivery while minimizing the mixing of room air.

The adaptive design of the nonrebreather mask, which includes one-way valves, prevents the exhaled air from re-entering the bag, thereby ensuring a higher concentration of oxygen is available with each breath. This makes the nonrebreather mask an effective and critical tool in emergency medical situations where oxygenation is crucial.

In contrast to the other choices, a nonrebreather mask does not deliver 40-60% or 60-80% oxygen, nor does it exceed 100% oxygen, which is not physiologically possible. Thus, the indication of 80-100% as the potential delivery range accurately represents the effectiveness of this oxygen delivery system.