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NZ739176B2 - Patient interface with volume reducing member - Google Patents
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NZ739176B2 - Patient interface with volume reducing member - Google Patents

Patient interface with volume reducing member Download PDF

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Publication number
NZ739176B2
NZ739176B2 NZ739176A NZ73917616A NZ739176B2 NZ 739176 B2 NZ739176 B2 NZ 739176B2 NZ 739176 A NZ739176 A NZ 739176A NZ 73917616 A NZ73917616 A NZ 73917616A NZ 739176 B2 NZ739176 B2 NZ 739176B2
Authority
NZ
New Zealand
Prior art keywords
patient
patient interface
interface according
volume
main
Prior art date
Application number
NZ739176A
Other versions
NZ739176A (en
Inventor
Charles Harry Finch
Original Assignee
ResMed Pty Ltd
Filing date
Publication date
Application filed by ResMed Pty Ltd filed Critical ResMed Pty Ltd
Priority to NZ778165A priority Critical patent/NZ778165B2/en
Priority to NZ778168A priority patent/NZ778168B2/en
Priority to NZ778166A priority patent/NZ778166B2/en
Priority claimed from PCT/AU2016/050634 external-priority patent/WO2017011864A1/en
Publication of NZ739176A publication Critical patent/NZ739176A/en
Publication of NZ739176B2 publication Critical patent/NZ739176B2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0605—Means for improving the adaptation of the mask to the patient
    • A61M16/0611—Means for improving the adaptation of the mask to the patient with a gusset portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0605—Means for improving the adaptation of the mask to the patient
    • A61M16/0616—Means for improving the adaptation of the mask to the patient with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0683—Holding devices therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1045—Devices for humidifying or heating the inspired gas by using recovered moisture or heat from the expired gas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/22—Carbon dioxide-absorbing devices ; Other means for removing carbon dioxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/0085—Special media to be introduced, removed or treated product washed out
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/02—Gases
    • A61M2202/0225—Carbon oxides, e.g. Carbon dioxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/02—General characteristics of the apparatus characterised by a particular materials
    • A61M2205/0216—Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/42—Reducing noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

patient interface includes a cushion assembly adapted to form a seal around the patient's nose and/or mouth and a gas washout vent configured to allow a flow of patient exhaled CO2to an exterior of the patient interface to minimise rebreathing of exhaled CO2by the patient. The cushion assembly defines a plenum chamber pressurised at a pressure above ambient pressure in use. At least one volume reducing member is provided within the plenum chamber to reduce an effective internal volume of the plenum chamber. The at least one volume reducing member is arranged to separate a main volume of the plenum chamber for delivery of the therapy pressure from deadspace volume provided at least superior the entrance to the patient's nasal passages. The main volume is adapted to be in direct fluid communication with the patient's nose and/or mouth and the vent.

Claims (26)

1. A t interface for sealed ry of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to the patient’s airways including the entrance of a patient’s nares and a patient’s mouth, wherein the patient ace is configured to maintain a therapy pressure in a range of 4 cmH2O to 30 cmH2O above the ambient air pressure in use, throughout the patient’s respiratory cycle, while the patient is ng, to ameliorate sleep disordered breathing; said patient interface comprising: a cushion assembly adapted to form a seal around the patient’s nose and mouth, the cushion assembly defining a plenum chamber pressurised at the therapy pressure above the ambient pressure air in use; wherein the n assembly includes a seal forming structure adapted to form the seal at least along a portion of the patient’s nose, wherein the seal and the plenum chamber is adapted to only surround the t’s nose and mouth of the patient’s face; a gas washout vent configured to allow a flow of patient d CO2 to an exterior of the patient interface to minimise rebreathing of d CO2 by the patient; and one or more movable flaps or baffles provided within the plenum chamber to reduce an internal volume of the plenum chamber, wherein the one or more movable flaps or baffles is configured and arranged to separate a main volume of the plenum chamber for delivery of the therapy pressure from a deadspace volume of the plenum r, the main volume adapted to be in direct fluid communication with the entrance of the patient’s nares, the entrance of the patient’s mouth, and the gas washout vent, wherein the one or more e flaps or baffles creates a flow bias such that all patient inhalation and patient exhalation throughout the patient’s respiratory cycle occurs via the main volume.
2. The patient interface according to claim 1, wherein the one or more e flaps or baffles is arranged to reduce the internal volume of the plenum chamber without altering the seal.
3. The patient interface ing to claim 1, wherein the one or more movable flaps or baffles includes the one or more movable flaps.
4. The patient interface according to claim 3, wherein the one or more movable flaps separate or divide the plenum chamber into a main chamber and at least one peripheral r separate and distinct from the main chamber, the main chamber comprising the main volume.
5. The patient interface according to claim 4, wherein the at least one peripheral chamber comprises the deadspace volume within the plenum chamber.
6. The patient ace according to claim 5, wherein the internal volume of the plenum chamber is reduced to the main volume of the main r.
7. The patient interface according to claim 4, wherein the one or more movable flaps includes an upper or superior movable flap arranged to establish the at least one peripheral chamber adapted to be positioned above the patient’s nares.
8. The patient interface according to claim 4, wherein the one or more movable flaps includes a lower or inferior movable flap arranged to establish the at least one peripheral chamber adapted to be positioned below the t’s lower lip.
9. The patient interface according to claim 3, wherein each of the one or more movable flaps es a free end portion adapted to be oriented towards the patient’s face.
10. The patient interface according to claim 9, wherein each of the one or more movable flaps is flexible and is d to allow each of the one or more movable flaps to deform and/or flex to conform to the patient’s face.
11. The patient interface ing to claim 1, further comprising a heat and moisture exchanger within the plenum chamber.
12. The patient interface ing to claim 1, wherein the cushion assembly es a front wall portion and the seal forming structure.
13. The patient interface according to claim 12, wherein the front wall portion comprises the gas washout vent.
14. The patient interface according to claim 12, wherein the one or more movable flaps or baffles is provided to the front wall portion.
15. The patient interface according to claim 1, wherein the one or more movable flaps or baffles is arranged to separate the main volume from the deadspace volume provided inferior the entrance to the patient’s mouth.
16. The patient interface according to claim 1, wherein the one or more movable flaps or baffles is constructed of an elastomeric material.
17. The t interface according to claim 1, wherein the deadspace volume is pressurised via the flow of air at the continuously positive re and provides pneumatic sealing of the cushion assembly.
18. The patient interface according to claim 1, wherein the one or more movable flaps or baffles is structured and arranged to obstruct flow between the main volume and the deadspace volume.
19. The patient interface according to claim 1, wherein the one or more movable flaps or baffles separates or divides the plenum chamber into a main chamber and at least one peripheral chamber separate and distinct from the main chamber, the main chamber comprising the main .
20. The patient ace according to claim 19, further sing one or more risation ports ed to allow pressurisation via the flow of air at the continuously positive re of the at least one peripheral chamber.
21. The patient interface according to claim 20, further comprising a heat and moisture exchanger within the plenum chamber, and the one or more pressurisation ports are positioned on an anterior side of the heat and moisture exchanger.
22. The patient interface according to claim 1, wherein the one or more movable flaps or baffles comprises an end portion adapted to gly engage with the patient’s face.
23. The t ace according to claim 1, wherein the seal forming structure is adapted to form the seal along a nasal bridge region of the patient’s nose.
24. The patient interface according to claim 23, wherein the seal forming structure is adapted to form the seal along the nasal bridge region, sides of nose regions, cheek regions, side of mouth regions, and a below the lower lip region.
25. The patient interface according to claim 1, wherein the deadspace volume is provided superior the main volume and the entrance to the patient’s nares.
26. The t interface according to claim 1, wherein the flow bias is directed away from the ace volume. Nasai cavity Crai cavity Vocal folds Aiveoiar sacs Oesophagus Trachea \1i illli Bronchusummm_m“mm“mmmmmmmmm?mmmmmmmmm_m¥m/2 / M
NZ739176A 2016-07-18 Patient interface with volume reducing member NZ739176B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NZ778165A NZ778165B2 (en) 2016-07-18 Patient Interface with Volume Reducing Member
NZ778168A NZ778168B2 (en) 2016-07-18 Patient Interface with Volume Reducing Member
NZ778166A NZ778166B2 (en) 2016-07-18 Patient Interface with Volume Reducing Member

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562194451P 2015-07-20 2015-07-20
PCT/AU2016/050634 WO2017011864A1 (en) 2015-07-20 2016-07-18 Patient interface with volume reducing member

Publications (2)

Publication Number Publication Date
NZ739176A NZ739176A (en) 2024-03-22
NZ739176B2 true NZ739176B2 (en) 2024-06-25

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