Certified Respiratory Therapist Practice Exam

Which factor should be assessed if there are large air leaks around a nonrebreathing mask?

1. The tightness of the mask fit

2. The oxygen flow rate into the mask

3. The patient's facial structure

4. The type of nonrebreathing mask being used

The correct answer is: The tightness of the mask fit

Assessing the tightness of the mask fit is crucial when dealing with large air leaks around a nonrebreathing mask. A proper fit ensures that the mask creates an adequate seal against the patient's face, allowing for effective delivery of oxygen and minimizing the risk of environmental air entering the system. If the mask is too loose, it will allow air to escape and reduce the concentration of delivered oxygen to the patient, which can compromise their treatment. When considering other factors, while the oxygen flow rate can influence the effectiveness of oxygen delivery, if there is a significant air leak due to improper fit, even the correct flow rate may not achieve the desired effects. Similarly, the patient's facial structure might contribute to how well the mask fits, but the immediate concern of large air leaks is best addressed by ensuring the mask is properly secured. The type of nonrebreathing mask used can have implications for oxygen delivery but is not as critical as the actual fit on the patient's face in the context of addressing air leaks.