What is one potential adverse effect of improper mask fitting during NIV?

Improper mask fitting during noninvasive ventilation (NIV) can lead to pressure sores or facial dermatitis. This occurs because a poor fit can create excessive pressure on certain areas of the face where the mask makes contact. Over time, this pressure can cause skin irritation and, subsequently, skin breakdown or sores. Proper mask fitting is crucial in minimizing these risks, ensuring that the interface is both effective in delivering ventilation and comfortable for the patient.

On the other hand, improved patient compliance, decreased respiratory rate, and enhanced oxygenation are generally outcomes associated with proper mask fitting and effective NIV usage. If the mask is ill-fitting, it can lead to discomfort, potentially making patients less compliant with their treatment, thus worsening their respiratory status rather than improving it.