What characteristic of a full face mask can increase the risk of asphyxiation?

A full face mask is designed to cover the entire face, providing ventilation support while also potentially delivering supplemental oxygen. However, if the mask does not fit well or create a proper seal around the face, it can lead to significant risks, one of which is asphyxiation.

A poor mask fit allows for leaks, which can diminish the concentration of oxygen delivered to the patient and fail to effectively remove carbon dioxide from the mask, leading to hypoxemia and a buildup of carbon dioxide within the mask. This situation can critically compromise a patient's respiratory status, as they may inhale a mix of ambient air or exhaled gases, increasing the likelihood of asphyxiation.

Proper mask fit is essential in ensuring that the intended therapy is effective and safe, highlighting the importance of fitting the mask correctly before treatment begins.