Abstract: A respiratory mask for a medical patient including a shell and a flow coupling is disclosed. The shell includes an upper portion configured to cover a nose of the patient and a lower portion configured to cover a mouth of the patient, where an internal surface of the shell defines an interior volume of the respiratory mask. The flow coupling includes a body, a supply flow passage extending through the flow coupling, a scavenging flow passage extending through the flow coupling, and a septum within the body that separates the supply flow passage from the scavenging flow passage. The supply flow passage and the scavenging flow passage are fluidly coupled to an aperture that extends through the upper portion of the shell, and an aperture extending through the lower portion of the shell, respectively.

Abstract: A humidifier assembly includes a water supply reservoir; and a vessel defining a water holding cavity configured to hold water at a water level, and having an inlet adjacent to the bottom thereof, a respiratory gas inlet, a respiratory gas outlet, a gas pressure equalization port, a water level control port, and a water level control pipe communicating with said water level control port and configured to extend below the water level in the cavity. Tubing directs water from the water supply container to said humidifier vessel. Tubing also extends between the water supply container and gas pressure equalization port and water level control port. A first one-way valve is disposed along a pressure equalization flow path between the reservoir and cavity, which path includes the gas pressure equalization port, with third tubing extending therefrom to an opposite end disposed under the water level in the water holding cavity.

Abstract: A respiratory mask for a medical patient including a shell and a flow coupling is disclosed. The shell includes an upper portion configured to cover a nose of the patient and a lower portion configured to cover a mouth of the patient, where an internal surface of the shell defines an interior volume of the respiratory mask. The flow coupling includes a body, a supply flow passage extending through the flow coupling, a scavenging flow passage extending through the flow coupling, and a septum within the body that separates the supply flow passage from the scavenging flow passage. The supply flow passage and the scavenging flow passage are fluidly coupled to an aperture that extends through the upper portion of the shell, and an aperture extending through the lower portion of the shell, respectively.

Abstract: A heat and moisture exchange device for being selectively operated between HME mode and bypass mode comprises a rotatable valve and valve selector configured to be rotated without transferring rotational movement to tubing attached to the device.

Abstract: A respiratory therapy mask assembly that includes a mask, a substantially hollow primary extension, and a substantially hollow side extension. The mask assembly further includes a gas inlet adapter configured to direct oxygen into the primary extension when a gas source is connected to the gas inlet adapter. In addition, the mask assembly also includes a valved nebulizer adapter and a metered dose inhaler (MDI) adapter.

Abstract: A respiratory therapy mask assembly comprises a mask configured to be secured on a patient's face, a substantially hollow pipe having an upper end secured in the mask inlet port, a lower end configured to receive a gas inlet pipe adapter, and an angled side pipe extension configured to receive a valved nebulizer adapter assembly, a gas inlet pipe adapter and integral gas inlet pipe secured in the lower end of the hollow pipe, and a valved nebulizer adapter assembly secured in the angled pipe extension and having a reciprocally movable spring-loaded valve biased to close, and a valve actuator configured to cooperate with a nebulizer for opening the spring-loaded valve.