Respiratory assistance device, nasal apparatus and respiratory assistance mask
Inventors
Boussignac, Georges • Carrez, Jean-Luc • BERTHEUIL, Elodie • LESIMPLE BOBERT, Laurent • RIGA, Cyril
Assignees
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Publication Number
US-10806888-B2
Publication Date
2020-10-20
Expiration Date
Abstract
A respiratory assistance device (1) for a patient, includes a tubular element forming a main channel (5) (207) which is to be connected via the distal end (7) thereof to an airway of the patient, the main channel connecting to the exterior of the respiratory system of the patient via the proximal end (6) thereof, the device further including at least one auxiliary channel (8) (209) allowing the injection of jets of breathable gas for ventilation of the patient via the distal outlet openings (17) of the auxiliary channel(s), the outlet openings opening out into the main channel in the vicinity of the distal end thereof, deflection elements (14b) (14a) allowing the deflection of gas jets to the interior of the main channel, and an internal jet separator, coaxial and central to the main channel, which further ensures diversion of the flow for expired gases.
Core Innovation
The disclosed respiratory assistance device comprises a tubular element forming a main channel connected by a distal end to an airway of a patient, with the main channel configured to connect the respiratory system of the patient to the atmosphere by a proximal end. At least one first auxiliary channel injects one or more jets of breathable gas through at least one distal outlet orifice emerging into the main channel in a vicinity of the distal end, and a deflection system deflects each jet towards an inside of the main channel and towards the distal end according to a determined inclination so that deflected jets meet in a zone toward the distal end.
To address contamination from gases breathed out by the patient when they circulate in the main channel, the device includes at least one coaxial inner tube centered in the main channel. The inner tube is hollow and open at two ends in the main channel, has a determined length between the distal and proximal ends of the respiratory assistance device, and crosses a respective axis of each deflected jet to form a jet breaker towards a center of the main channel in a zone of meeting of the respective deflected jet axis and the inner tube.
Because the coaxial inner tube is hollow and open at both ends, it forms a by-pass between the distal end and the proximal end of the main channel for gases circulating in the main channel and for gases breathed out by the patient. The detailed description also provides structural variants of the deflection system and inner-tube arrangement, including fin-based coaxial support and alternative dual-opposite-flow configurations with additional auxiliary channels near the proximal end.
Claims Coverage
The independent claim provides the core claim coverage, with dependent claims refining structural and functional features. The main inventive features center on a main channel with deflected breathable-gas jets injected via auxiliary channels, a coaxial hollow inner tube acting as a jet breaker at the deflected-jet meeting zone, and a hollow open-ended by-pass that provides an internal path for gases breathed out by the patient between distal and proximal ends.
Main tubular channel with proximal atmospheric connection
A tubular element forming a main channel configured to be connected by a distal end to an airway of the patient, with the main channel connecting the respiratory system to the atmosphere by a proximal end.
Auxiliary-channel injection of deflected jets near the distal end
At least one first auxiliary channel configured to allow injection through at least one distal outlet orifice of at least one jet of breathable gas, the distal outlet orifice emerging into the main channel in a vicinity of the distal end; a deflection system deflects the at least one jet towards an inside of the main channel and towards the distal end according to a determined inclination.
Coaxial jet-breaker inner tube crossing the deflected-jet axes
At least one coaxial inner tube centered in the main channel, hollow and open at two ends, extended such that it is between distal and proximal ends; the inner tube crosses a respective axis of the deflected jet to form a jet breaker towards a center of the main channel in a zone of meeting of the respective deflected jet axis and the inner tube.
Hollow inner-tube bypass for gases breathed out
The at least one inner tube is hollow and open at the two ends in the main channel in order to form a by-pass between the distal end and the proximal end of the main channel for gases circulating in the main channel and for gases breathed out by the patient.
Distal outlet-orifice geometry with sub-150 µm constraint
The distal outlet orifices emerging from the first auxiliary channel are shaped as punctual, annular, or semi-annular band-shaped openings, with the punctual orifice diameter or the band-shaped orifice thickness less than 150 micrometers.
Fins for coaxial holding without fins in the jet-deflection zone
Fins hold the at least one inner tube coaxially in the main channel, but the fins are absent in the zone where the at least one deflected jet occurs.
Breathing-in brake to create intrathoracic depression
A brake selectively restricts inhaled atmospheric gases at the beginning of the breathing in phase to create an intrathoracic depression that improves venous return toward the heart.
Nasal respiratory assistance apparatus with parallel nostril-specific devices
A nasal respiratory assistance apparatus includes, for each nostril, a device as defined above, with breathable gases supplied to the two nostril-specific devices in parallel.
Dual opposite flow architecture with additional proximal auxiliary channel
A dual opposite flow breathing device includes an additional auxiliary gas channel connected to a pressurized gas source near the proximal end of the main channel, using deflection systems to redirect the auxiliary gas jet into the main channel to form proximal-end jets, with deflected-jet zones each including inner tubes that are defined as unique/common or separate per zone.
Across the independent claim and dependent refinements, the coverage emphasizes a deflected-jet ventilation architecture in a main tubular channel with a coaxial hollow inner tube that forms a jet breaker and provides an internal by-pass for gases breathed out by the patient, with further refinements to orifice geometry, fin placement, phase-dependent inhalation restriction, nasal/nostril parallel configuration, and dual-opposite-flow structure.
Stated Advantages
Reduced acoustic pressure.
Maintenance of CPAP performance parameters.
Documented Applications
Invasive ventilation and non-invasive ventilation of a patient.
Resuscitation during cardiac arrest.
Nasal respiratory assistance apparatus for a patient, supplied for each nostril in parallel.
Dual opposite flow breathing device for a patient.
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