A noise reduction device (100) for a respiratory apparatus (162) including a body (104) with a gas outlet (106) arranged to be mounted on the gas inlet (164) of the respiratory apparatus (162), and a cover (102) configured to be detachably engaged with the body (104) for forming a gas inlet (156) and a gas passage (138). The cover (102) includes a guiding member (136) to define at least a part of the gas passage (138) and the guiding member (136) is configured to be coupled with the body (104) to form the gas passage (138) between the body (104) and the cover (102). The noise reduction device (100) in the present invention provides a longer and smooth passage (138) for the gas to flow from the gas inlet (156) to the gas outlet (106) for reduction of turbulence and resistance of gas flow and hence reducing the noise caused by the friction between the fluctuated gas flow and the gas inlet (164) of the respiratory apparatus (162).

A respiratory apparatus (100), comprising: a first gas inlet (202) for supplying a first gas to the respiratory apparatus (100); a second gas inlet (206) connectable to a pressurized gas source to supply a pressurized gas; a mixing chamber (204) for mixing the first gas and the pressurized gas; and a noise-damping member (216) disposed downstream of the mixing chamber (204).

Systems and methods for generating nitric oxide are disclosed. A nitic oxide (NO) generation system includes at least one pair of electrodes configured to generate a product gas containing NO from a flow of a reactant gas; and a controller configured to regulate the amount of nitric oxide in the product gas produced by the at least one pair of electrodes by utilizing duty cycle values of plasma pulses selected from a plurality of discrete duty cycles to produce a target rate of NO production based on an average of discrete production rates associated with each of the plurality of discrete duty cycles.

A blower is disposed in a main flow passage of a main unit of a CPAP device. An upstream flow passage connected upstream of the main flow passage is in a base unit. A sealing member secured to the base unit of the CPAP device has an annular shape surrounding a second outlet from outside. The shape of an opening of the sealing member at a distal end edge in the extending direction is a shape surrounding a first inlet from outside. The dimension of the sealing member in the extending direction is greater than the dimension of the sealing member in the thickness direction. When the main unit is attached to the base unit, the dimension of the sealing member in the extending direction is greater than a minimum distance from a proximal end of the sealing member in the extending direction to the main unit.

An emergency ventilator for artificially ventilating patients in the event of a medical emergency, including: - a housing with an ambient air suction opening and a ventilating gas outlet opening, - a fan which is designed and is arranged in the housing so as to convey ambient air from the ambient air suction opening to the ventilating gas outlet opening, - an air filter which is designed to purify suctioned ambient air and which is arranged in the housing downstream of the ambient air suction opening in the flow path of the ambient air, and - an energy storage device for supplying the fan with energy in order to operate same, wherein the air filter is received in the housing in an accessible manner through a housing opening, which is closed but can be opened by a housing cover, and so as to be replaceable in an intended manner, and the energy storage device is received in the housing in an accessible manner through the housing opening, which is closed but can be opened by the housing cover, and so as to be replaceable in an intended manner, the air filter and the energy storage device can be accessed through a common housing opening, the common housing opening being selectively closable and openable by a common housing cover.

Systems and methods are provided for portable and compact nitric oxide (NO) generation that can be embedded into other therapeutic devices or used alone. In some embodiments, an ambulatory NO generation system can be comprised of a controller and disposable cartridge. The cartridge can contain filters and scavengers for preparing the gas used for NO generation and for scrubbing output gases prior to patient inhalation. The system can utilize an oxygen concentrator to increase nitric oxide production and compliment oxygen generator activity as an independent device. The system can also include a high voltage electrode assembly that is easily assembled and installed. Various nitric oxide delivery methods are provided, including the use of a nasal cannula.

Systems and methods can determine whether a patient is attached to a respiratory device (such as to via a patient interface) by analyzing a flow parameter signal in the time domain. Additionally, the processes can classify the patient attachment status into one of the four categories: detached, attaching, attached, or detaching. The system can include a non-sealed patient interface, such as a nasal cannula in a nasal high flow therapy, or any other patient interfaces. Data of the patient's use of the respiratory system can provide therapy compliance and long-term trend of use information and/or progress in the patient's respiratory functions and/or other physiological functions.

A valve assembly (1, 12, 21, 31, 44, 52, 60) includes a hollow tube (2). The valve assembly (1, 12, 21, 31, 44, 52, 60) also includes a first set of one or more valves (3) 5 arranged within the hollow tube (2). The first set of valves (3) is configured to permit sliding passage of a substantially cylindrical object (4). The valve assembly (1, 12, 21, 31, 44, 52, 60) also includes a second set of valves (5) arranged within the hollow tube (2) and spaced apart from the first set of valves to (3) define a chamber. The second set of valves (5) are configured to permit sliding passage of the cylindrical object (4). The 10 valve assembly (1, 12, 21, 31, 44, 52, 60) also includes one or more ultraviolet light sources (10) within the chamber (6) and/or a first port (13) connecting the chamber (6) to the exterior of the hollow tube (2) and configured for connection to a fluid flow path (14) for supply and/or extraction of fluid (19).

A medical waste collection system for collecting medical waste material, and a manifold for filtering the waste material and/or coupling a suction tube to the system. The system may include a receiver in which the manifold is configured to be inserted in a proximal direction to facilitate an inlet mechanism moving correspondingly in the distal direction. The manifold may include an arm, a spine, a lock element, and/or a catch each having a surface with a relative position in the proximal-to-distal direction. The rim and the catch may be spaced apart by a void, and the rim may be positioned below the catch. The housing may include a body portion, a first leg extending proximally from the body portion, and a second leg spaced apart from the first leg to define the void. The rim may be on the first leg, and the catch may be on the second leg.

A system and method for pumping fluid using a set of interconnected pump cassettes is disclosed. Each of the pump cassettes can receive a first solution in a first pumping chamber and each of the pump cassettes can receive separate second solutions in respective second pumping chambers, so that the first solution can be mixed with the separate second solutions, each said mixture capable of being placed in separate containers. The system includes a control assembly for operating each pump cassette, each pump cassette having a flexible membrane to pump fluid into and out of the pumping chambers, and each pump cassette configured for mating with a base unit that provides positive or negative pneumatic pressure to the flexible membrane.