A portable oxygen generating system is provided that comprises a reaction chamber, a feed system for providing and controlling hydrogen peroxide solution to the reaction chamber, and a cooling/condensing system for cooling the hot oxygen and water vapor leaving the reactor and condensing and removing water. The portable chemical oxygen generation system produces humidified, breathable oxygen, that is substantially free of hydrogen peroxide and other contaminants, at a controlled flow and temperature over an extended period of time.

A nitric oxide administration device 1 includes a first flow path 101 including a first intake port 101a and an oxygen supply port 101b, an oxygen generation unit 100 which is arranged in the first flow path 101 and which generates concentrated oxygen from air introduced via the first intake port 101a, the generated concentrated oxygen being supplied via the oxygen supply port 101b, a second flow path 201 which is branched from the first flow path 101 and which includes an NO supply port 201b, and an NO generation unit 200 which is arranged in the second flow path 201 and which generates NO from gas distributed from the first flow path 101, the generated NO being supplied via the NO supply port 201b.

A flow generator is configured to pressurize a flow of breathable gas to within a range of about 2-30 cm H.sub.2O for delivery to a patient's airways. The flow generator includes a blower with at least one impeller and a motor configured to drive the at least one impeller. The flow generator also includes a substantially planar blower mount configured to support the blower. The blower mount includes a flexible blower receptacle portion configured to receive and support the blower. The blower receptacle portion includes an outlet opening that is axially aligned with an air outlet of the blower. The flow generator also includes housing that encloses the blower and the blower mount. The housing has an inner surface that engages a perimeter of the blower mount.

A relay administration device 50 for use in connection to a nitric oxide administration device 20 which supplies NO generated from air, includes an NO densitometer 506, a flowmeter 507 or pressure gauge 504, a control unit 600 which calculates a dosage of NO to be administered to a patient based on an NO concentration measured by the NO densitometer 506 and a value of the flowmeter 507 or the pressure gauge 504, and a two-way valve 505 which is configured to increase a flow rate when the calculated dosage is less than a predetermined value and to decrease the flow rate when the calculated dosage is greater than a predetermined value.

Various embodiments are directed to a compact respirator assembly comprising a respirator housing; and a compact blower assembly, the compact blower assembly comprising an impeller configured to pull a volume of air into a blower assembly air inlet; a blower scroll configured to receive the volume of air and direct the volume of air toward a blower scroll air outlet, the blower scroll comprising: a first blower scroll component comprising at least a portion of a blower frame element comprising a portion of the respirator housing; a second blower scroll component comprising a scroll cover secured to the blower frame element so as to define an internal scroll flow chamber, wherein the internal scroll flow chamber comprises a cavity positioned between the scroll cover and the blower frame element; and wherein the blower scroll air inlet comprises an opening that extends through a thickness of the respirator housing.

An apparatus such as a fluid mixer, suitable for use with a respirator, including a venturi nozzle for flow of a pressure-controlled fluid; an ambient fluid aperture in fluid communication with the venturi nozzle; a fluid port; a pressure force multiplier in fluid communication with the fluid port; and a valve moveable relative to the venturi nozzle between a start flow position and a stop flow position; where the pressure force multiplier is configured such that fluid forced into the fluid port actuates the valve relative to the venturi nozzle; and where the pressure force multiplier is configured such that fluid withdrawn from the fluid port actuates the valve relative to the venturi nozzle. A method of using an apparatus suitable for a ventilator is also disclosed.

Lightweight, portable oxygen concentrators that operate using an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.

A seal-forming structure for a patient interface may include a patient-contacting surface configured to engage the patient's facial skin to form a seal; a posterior opening formed in the patient-contacting surface, the posterior opening configured to provide the flow of air at said therapeutic pressure to the patient's nares; and a support structure extending from the patient contacting surface to an interior surface of the seal-forming structure, the support structure and the interior surface forming a continuous loop, wherein the patient interface is configured to allow the patient to breath from ambient through their mouth in the absence of a flow of pressurised air through the plenum chamber inlet port, or the patient interface is configured to leave the patient's mouth uncovered.

An example of a nitric oxide (NO) generating system includes an NO generating formulation, having: a stable NO donor/adduct; a hydrophilic binder; and an additive. The additive is to control a rate of release of NO from the stable NO donor/adduct after the formulation is exposed to an effective amount of water, water vapor, or blue or ultraviolet (UV) light. This example NO generating system further includes an inhalation device in operative contact with the NO generating formulation.

A disposable filter (100), for use in a breathing circuit of a ventilator, includes a filter housing (110), which encloses a filter material (112) of the disposable filter. The filter housing has a first filter opening (118) and a second filter opening (119) for the respective connection of a gas-carrying (gas-guiding) component, especially of a respective tube, for a gas to be carried through the disposable filter. The filter material is arranged between the first filter opening and the second filter opening. The disposable filter has on the filter housing an imprint (120), which is arranged on the filter housing by a printing process, and which forms a structured surface (122). The structured surface can be written on and includes at least seven check (marking) areas (124).