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Publication Number
US-10307552-B2
Publication Date
2019-06-04
Expiration Date
Abstract
An adaptor comprises comprising a base element and a nozzle element which are operatively coupled to each other. The base element defines a throat and at least one entrainment port facilitating a path of fluid communication between the throat and ambient air. The nozzle element includes a jet nozzle, and a connector which is adapted to facilitate the fluid coupling of the nozzle element to a bi-lumen tube of the patient circuit. The connector includes both a delivery port and a sensing port. The jet nozzle and the delivery port collectively define a delivery line or lumen which fluidly communicates with the throat of the base element, and is placeable into fluid communication with the delivery lumen of the bi-lumen tube.
Core Innovation
The disclosure relates to a jet-pump adaptor for fluidly coupling a flow generator to a ventilation mask in a respiratory assistance system. A base element is fluidly connectible to the ventilation mask and includes a connector defining an interior, a tubular wall protruding into the connector interior to at least partially define a throat, and a distal end that fluidly communicates with the connector interior. The tubular wall proximal end defines an opening, and at least one entrainment port is in open fluid communication with ambient air and is at least partially defined by an aperture in the tubular wall between the distal end and the proximal end.
A nozzle element is connectable to the base element and fluidly connectible to a main gas delivery tube in fluid communication with the flow generator. The nozzle element includes a jet nozzle having a distal tip and at least partially defining a gas delivery lumen. When the nozzle element is connected to the base element with the jet nozzle advanced through the opening, a gas-tight coupling is formed between the jet nozzle and the proximal end of the tubular wall.
The distal tip of the jet nozzle is positioned within the tubular wall at a distance from the distal end of the tubular wall to communicate gas into the throat so that, when gas is flowed through the gas delivery lumen and out the jet nozzle into the throat, ambient air is entrained through the entrainment port. The connection of the nozzle element to the base element is selectively variable between at least two connected configurations to permit the distance from the distal tip of the jet nozzle to the distal end of the tubular wall to be varied by transitioning the connection of the nozzle element to the base element.
The disclosure further describes pressure sensing structures with a fluid-isolated sensing pressure lumen and a maintaining pressure sensing conduit via an annular channel, including selectable rigid/rotatable/threadable attachment modes. Additional embodiments include anti-asphyxia valve mechanisms for exhalation and exhalation/PEEP control using piloted or proportional exhalation valves and fixed PEEP valve concepts, with exhaled gas routed to ambient through the entrainment port.
Claims Coverage
The independent claim covers an adaptor that couples a flow generator to a ventilation mask using a jet-nozzle and throat arrangement that forms a gas-tight coupling to entrain ambient air. The inventive features include a selectable nozzle-to-throat distance via variable connection configurations, entrainment via at least one entrainment port in the tubular wall, and a specific gas communication arrangement into the throat. Only one independent claim is identified in the provided content.
Gas-tight jet nozzle to tubular wall throat entrainment coupling with variable nozzle position
An adaptor for fluidly coupling a flow generator to a ventilation mask, comprising a base element with a tubular wall defining a throat and an entrainment port in open fluid communication with ambient air, and a nozzle element with a jet nozzle defining a gas delivery lumen, wherein when the nozzle element is connected to the base element with the jet nozzle advanced through the opening a gas-tight coupling is formed between the jet nozzle and the proximal end of the tubular wall, the distal tip is positioned within the tubular wall at a distance from the distal end to fluidly communicate gas into the throat, and ambient air is entrained through the entrainment port.
Selectively variable nozzle-to-throat distance by transitioning connected configurations
The connection of the nozzle element to the base element is selectively variable between at least two connected configurations so as to permit the distance from the distal tip of the jet nozzle to the distal end of the tubular wall to be varied by transitioning the connection of the nozzle element to the base element to one of the connected configurations.
Across the provided independent claim, the main inventive concept is a jet-nozzle and tubular-wall throat arrangement that forms a gas-tight coupling to entrain ambient air through an entrainment port, combined with a selectively variable connection that changes the nozzle-to-throat spacing.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Non-invasive open ventilation system using a non-vented nasal/full-face mask [procedural detail omitted for safety].
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