Why is it important for a full face mask to maintain a good fit?

Maintaining a good fit with a full face mask is crucial because it directly affects the mask’s ability to function effectively in delivering noninvasive mechanical ventilation. A well-fitting mask minimizes airflow leaks, which can lead to inadequate ventilation and decreased treatment efficacy. When leaks occur, the intended pressure support may not be effectively delivered to the patient’s airways, which can compromise oxygen delivery and carbon dioxide clearance.

Additionally, a good fit helps ensure that the patient's treatment is consistent and reliable; fluctuations in leak volume can lead to fluctuating pressures, which can hinder respiratory support. Therefore, achieving and maintaining a proper fit significantly contributes to the overall success of noninvasive ventilation therapy.