What is the purpose of a non-rebreather mask?

• A. To deliver high concentrations of oxygen in emergencies
• B. To humidify supplemental oxygen
• C. To administer medications intravenously
• D. To monitor respiratory rate

Answer: (A)

The purpose of a non-rebreather mask is to deliver high concentrations of oxygen, particularly in emergency situations. This type of mask is designed with a one-way valve that prevents exhaled air from mixing with the oxygen being supplied. Essentially, it allows a patient to inhale a higher percentage of oxygen while also reducing the risk of carbon dioxide rebreathing. This is critical in emergencies when a patient may be experiencing severe respiratory distress or conditions such as shock, where oxygen delivery to vital organs needs to be maximized quickly.

The effectiveness of a non-rebreather mask is primarily due to its ability to provide a concentrated flow of oxygen, often reaching levels close to 90-100%. This is crucial for patients who are hypoxic or in need of immediate respiratory support. In contrast, other options like humidifying oxygen or administering medications pertain to different functions not associated with the primary role of a non-rebreather mask. Monitoring respiratory rates is also unrelated to the usage of this mask, which focuses on oxygen delivery rather than measurement or support in that manner.