Methods, systems and devices for non-invasive open ventilation with gas delivery nozzles within nasal pillows
Inventors
Wondka, Anthony D. • Allum, Todd • Cipollone, Joseph • Kapust, Gregory • Eghbal, Darius • Aguirre, Joey • Gerber, Anthony
Assignees
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Publication Number
US-12161807-B2
Publication Date
2024-12-10
Expiration Date
Abstract
A non-invasive ventilation system may include a nasal interface. The nasal interface may include a left outer tube with a distal end adapted to impinge a left nostril, at least one left opening in the left distal end in pneumatic communication with the left nostril, and a left proximal end of the left outer tube in fluid communication with ambient air. The left proximal end of the left outer tube may curve laterally away from a midline of a face. A right outer tube may be similarly provided. One or more left jet nozzles may direct ventilation gas into the left outer tube, and one or more right jet nozzles may direct ventilation gas into the right outer tube. The jet nozzles may be in fluid communication with the pressurized gas supply.
Core Innovation
The invention describes a non-invasive ventilation system that uses a patient interface delivering ventilation gas via nasal jet/nozzles positioned to impinge with a nostril while leaving the nose open for ambient inhalation and ambient exhalation. Ventilation gas is delivered into a manifold and exits through a gas delivery nozzle to define a gas flow direction through a gas flow path terminating at a distal end of the manifold, and an aperture through which ambient air may be entrained is provided at least partially downstream of the gas delivery nozzle.
The patient interface includes a pressure sensing lumen that terminates in a pressure sensing port that opens into the manifold gas flow path. The pressure sensing port opens downstream of the gas delivery nozzle in the gas flow direction so that the ventilator may be placed in communication with the pressure sensing port via a pressure sensing channel. The pressure sensing channel and the ventilator gas delivery channel are within the same tube of tubing for communication with the manifold via the same gas delivery tube attachment.
In the left/right configuration, the manifold defines, for each side, a gas flow path and a pressure sensing lumen/port, with tubular extensions configured to impinge with a nostril. Ventilator gas delivery channels deliver ventilation gas from a ventilator into the respective gas flow paths via respective gas delivery nozzles, with the gas flow path curved such that the gas delivery nozzle is angulated into a wall of the manifold. Apertures are provided for each side to entrain ambient air by the ventilation gas exiting the respective nozzle.
Claims Coverage
The partial set includes three independent claims that center on a non-invasive ventilation patient interface having a manifold with a downstream pressure sensing port in the gas flow path, tubing that integrates ventilator gas delivery and pressure sensing channels within the same tube via a shared gas delivery tube attachment, and an aperture at least partially downstream of a nozzle to entrain ambient air. The independent claims are differentiated by single-sided versus left/right manifold arrangements and the presence of separate pressure-sensing paths for each side.
Manifold with downstream pressure sensing lumen and port
A manifold defining a gas flow path that terminates at a distal end and a pressure sensing lumen that terminates in a pressure sensing port that opens into the gas flow path, with the pressure sensing port opening downstream of a gas delivery nozzle in the gas flow direction.
Tubing integrating ventilator gas delivery and pressure sensing within same tube
Tubing attachable to a gas delivery tube attachment, including a ventilator gas delivery channel for delivering ventilation gas into the gas flow path via a gas delivery nozzle and a pressure sensing channel that communicates with the pressure sensing lumen, wherein the pressure sensing channel and the ventilator gas delivery channel are within the same tube of the tubing for communication with the manifold via the same gas delivery tube attachment.
Nozzle-directed curved gas flow with nozzle angulated into manifold wall
A gas flow path being curved such that the gas delivery nozzle is angulated into a wall of the manifold, with the gas flow path direction defined by the nozzle delivery into the manifold gas flow path.
Downstream ambient air entrainment aperture
An aperture through which ambient air may be entrained by the ventilation gas exiting the gas delivery nozzle, the aperture being at least partially downstream of the gas delivery nozzle.
Left/right manifold sides with respective sensing and entrainment
A manifold having left and right sides, each side having a tubular extension configured to impinge with a nostril, each side defining a respective gas flow path and a pressure sensing lumen terminating in a pressure sensing port opening into the respective gas flow path, and wherein each side further comprises an aperture at least partially downstream of the respective gas delivery nozzle to entrain ambient air.
Across the independent claims, the core inventive coverage is a patient interface for non-invasive ventilation that combines nozzle-based curved gas flow into a manifold with a downstream pressure sensing port connected through a pressure sensing lumen, while integrating pressure sensing and ventilator gas delivery within the same tubing assembly via a shared gas delivery tube attachment, and providing a downstream aperture to entrain ambient air; additional coverage is provided for left/right manifold side implementations.
Stated Advantages
Reduced ventilator output due to ambient entrainment as described in performance comparisons using a lung simulator showing much lower required ventilator output compared to conventional oxygen therapy and other referenced modes.
Increased delivered tidal volume, with the patent reporting an increase on the order of about 41% in described comparisons.
Maintain comfort while breathing ambient air, as stated in connection with waveform/timing strategies and objectives including comfort and reduced gas consumption.
Documented Applications
Non-invasive ventilation using an open nasal interface with ambient-air entrainment via a manifold and nozzle arrangement.
Use with trans-oral cannula and an ET tube interface, including an optional PEEP valve.
Sleep apnea management (SA/OSA/CSA/MSA) using treatment algorithms based on apnea prediction/detection and associated sensing.
Ambulatory use with mobility modes employing long gas circuits, and stationary use with alternative institutional setup using hospital pressurized gas supplies.
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