Abstract: A gas delivery apparatus configured for use with a mechanical ventilator having an atmospheric inlet for drawing in atmospheric gas includes a connecting device configured to connect to an oxygen supply and an air supply and to deliver mixed air and oxygen gas to the atmospheric inlet of the mechanical ventilator. The connecting device further includes a user control for adjusting a fraction of oxygen in the mixed air and oxygen gas. The connecting device comprises a reservoir configured to hold a volume of the mixed air and oxygen gas.

Abstract: A filtration arrangement includes a filtration element and a housing disposed around, and retaining the filtration element therein. The housing includes: a first and second ends and a wall portion extending therebetween. An outlet is defined in the housing proximate the first end, a primary inlet is defined in the housing proximate the second end, and a plurality of secondary inlets are defined in the wall portion. The first end of the housing is adapted for coupling to a main housing of a flow generating device encircling an air inlet thereof. The primary and secondary inlets are positioned and structured to communicate ambient air from the surrounding environment to the filtration element. the outlet is positioned and structured to communicate the ambient air that has passed through the filtration element from one or more of the primary and secondary inlets to the air inlet of the flow generating device.

Abstract: The present disclosure pertains to a therapeutic gas delivery system (8) including a pressure generator inlet apparatus (10) configured to facilitate filtering of gas drawn into the inlet (14) of the pressure generator (16) of the system. The apparatus comprises a body (12) and a support (24). The body is configured to removably engage the inlet of the pressure generator and receive a particulate filter (18). The body forms an orifice (19) configured to conduct gas that has passed through the filter to the pressure generator inlet. The support is coupled to the body at or near the orifice. The support is configured to extend from the body toward the filter and support the filter. The support is configured to resist collapse of the filter into the orifice caused by gas flowing through the filter to the pressure generator inlet.

Abstract: A gas delivery apparatus configured for use with a mechanical ventilator having an atmospheric inlet for drawing in atmospheric gas includes a connecting device configured to connect to an oxygen supply and an air supply and to deliver mixed air and oxygen gas to the atmospheric inlet of the mechanical ventilator. The connecting device further includes a user control for adjusting a fraction of oxygen in the mixed air and oxygen gas. The connecting device comprises a reservoir configured to hold a volume of the mixed air and oxygen gas.

Abstract: A filtration arrangement includes a filtration element and a housing disposed around, and retaining the filtration element therein. The housing includes: a first and second ends and a wall portion extending therebetween. An outlet is defined in the housing proximate the first end, a primary inlet is defined in the housing proximate the second end, and a plurality of secondary inlets are defined in the wall portion. The first end of the housing is adapted for coupling to a main housing of a flow generating device encircling an air inlet thereof. The primary and secondary inlets are positioned and structured to communicate ambient air from the surrounding environment to the filtration element. the outlet is positioned and structured to communicate the ambient air that has passed through the filtration element from one or more of the primary and secondary inlets to the air inlet of the flow generating device.

Abstract: The present disclosure pertains to a system for controlling a leak flow rate during respiratory therapy. The system is configured to determine a leak flow rate necessary for CO2 expulsion for an individual subject and facilitate control of the leak flow rate during therapy such that the system exhausts substantially the entire exhaled volume of gas during an expiration of the subject. The system facilitates control of the leak flow rate during therapy via an adjustable leak valve. Determining the leak flow rate for the subject and facilitating control of the leak rate may minimize noise from air flow in the system, minimize the power draw needed by a pressure generator of the system, reduce a loss of medicine added to the respiratory therapy gas, and/or have other advantages, while still expelling the desired amount of CO2.

Abstract: The present disclosure pertains to a therapeutic gas delivery system (8) including a pressure generator inlet apparatus (10) configured to facilitate filtering of gas drawn into the inlet (14) of the pressure generator (16) of the system. The apparatus comprises a body (12) and a support (24). The body is configured to removably engage the inlet of the pressure generator and receive a particulate filter (18). The body forms an orifice (19) configured to conduct gas that has passed through the filter to the pressure generator inlet. The support is coupled to the body at or near the orifice. The support is configured to extend from the body toward the filter and support the filter. The support is configured to resist collapse of the filter into the orifice caused by gas flowing through the filter to the pressure generator inlet.

Abstract: A bi-directional gas flow generation system (10), the system comprising: (a) a pressure generator (14) comprising an inlet (40) and an outlet (42), (b) a flow member (16) comprising an outlet port (50), an inlet port (52), a respiratory circuit port (54) and a flow path (60), (c) a first valve (18), (d) a second valve (20), and (e) a processor (24) configured to selectively control the first valve and the second valve to operate in (i) a first mode in which gas flows from the flow member inlet port (52) to the respiratory circuit port (54), thereby creating a positive pressure at the respiratory circuit port (54) to insufflate the subject; and (ii) a second mode in which gas flows from the respiratory circuit port (54) to the flow member outlet port (50), thereby facilitating gas flow out from the airway of the subject to exsufflate the subject.

Abstract: The present disclosure pertains to a system for controlling a leak flow rate during respiratory therapy. The system is configured to determine a leak flow rate necessary for CO2 expulsion for an individual subject and facilitate control of the leak flow rate during therapy such that the system exhausts substantially the entire exhaled volume of gas during an expiration of the subject. The system facilitates control of the leak flow rate during therapy via an adjustable leak valve. Determining the leak flow rate for the subject and facilitating control of the leak rate may minimize noise from air flow in the system, minimize the power draw needed by a pressure generator of the system, reduce a loss of medicine added to the respiratory therapy gas, and/or have other advantages, while still expelling the desired amount of CO2.