What is one major risk associated with full face masks?

Full face masks are often used in noninvasive ventilation to provide a sealing effect over the nose and mouth, but they come with specific drawbacks. One significant risk associated with their use is the potential for claustrophobia. The design of a full face mask can create a sensation of confinement, particularly for individuals who may already have anxiety or feelings of claustrophobia in enclosed spaces. This can lead to discomfort or panic, resulting in difficulties with adherence to therapy.

While increased airflow obstruction and decreased comfort can also be relevant concerns with some mask types, they do not universally apply to full face masks specifically in the same way that claustrophobia does. Additionally, improved speech capability is not a benefit associated with full face masks, as they typically inhibit normal speaking ability due to their coverage of the mouth.