ANTI-ASPHYXIA VALVE ASSEMBLY FOR RESPIRATORY MASK

摘要

An elbow assembly (5) for a mask assembly includes an anti-asphyxia valve (AAV) assembly (15) that may take the form of a box-like frame work, a drop-in arrangement, or a slot-in arrangement. In each case, the AAV assembly (15) may include a flap element (45) which is movable so as to either direct ambient gas/air to the elbow assembly (5) and thus the patient using the mask assembly, or to allow the passage of pressurized gas to the patient.