How should a nurse respond when a client questions the need for a nasal cannula?

The choice indicating that the nasal cannula "delivers the low concentration of oxygen you need" is correct because it directly addresses the client's inquiry by explaining the purpose and function of the device. A nasal cannula is designed to provide supplemental oxygen to patients who may be experiencing hypoxia or have respiratory issues that require additional oxygen support. By clarifying that it delivers a specific concentration of oxygen, the nurse reassures the client about the therapeutic role of the nasal cannula in their care.

This approach not only informs the client about the reason for using the nasal cannula but also emphasizes the importance of maintaining adequate oxygen levels for their health and recovery. By providing this concise and relevant information, the nurse can alleviate any concerns the client might have about the use of supplemental oxygen, potentially increasing their compliance and understanding of their treatment plan.