NZ778166B2 - Patient Interface with Volume Reducing Member - Google Patents

Patient Interface with Volume Reducing Member

Info

Publication number
NZ778166B2
NZ778166B2 NZ778166A NZ77816616A NZ778166B2 NZ 778166 B2 NZ778166 B2 NZ 778166B2 NZ 778166 A NZ778166 A NZ 778166A NZ 77816616 A NZ77816616 A NZ 77816616A NZ 778166 B2 NZ778166 B2 NZ 778166B2
Authority
NZ
New Zealand
Prior art keywords
patient
chamber
patient interface
plenum chamber
volume
Prior art date
Application number
NZ778166A
Other versions
NZ778166A (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
Publication of NZ778166A publication Critical patent/NZ778166A/en
Publication of NZ778166B2 publication Critical patent/NZ778166B2/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 for sealed delivery 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 at least entrance of a patient’s nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH2O to about 30 cmH2O above ambient air pressure in use, throughout the patient’s respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing; said patient interface comprising: a cushion assembly adapted to form a seal around the patient’s nose and/or mouth, the cushion assembly forming a plenum chamber pressurised at a pressure above ambient pressure in use; a gas washout vent configured to allow a flow of patient exhaled CO2 to an exterior of the patient interface to minimise rebreathing of exhaled CO2 by the patient; a heat and moisture exchanger provided within the plenum chamber between the patient’s airways and the gas washout vent; and at least one movable flap provided within the plenum chamber to reduce an internal volume of the plenum chamber, wherein the at least one movable flap is arranged to separate the plenum chamber into a main chamber and at least one peripheral chamber, the main chamber comprising a main volume of the plenum chamber for delivery of the therapy pressure, and the at least one peripheral chamber comprising a deadspace volume of the plenum chamber, wherein the main volume is adapted to be in direct fluid communication with at least the entrance to the patient’s nares, the heat and moisture exchanger, and the gas washout vent.

Claims (13)

1. A patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to t air pressure to an entrance to the patient’s airways including at least entrance of a patient’s nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH2O to about 30 cmH2O above ambient air re in use, throughout the patient’s respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing; said patient interface comprising: a cushion ly adapted to form a seal around the patient’s nose and/or mouth, the n assembly forming a plenum chamber pressurised at a pressure above ambient pressure in use; a gas washout vent configured to allow a flow of patient exhaled CO2 to an exterior of the patient interface to minimise rebreathing of d CO2 by the patient; a heat and moisture exchanger provided within the plenum chamber between the patient’s airways and the gas washout vent; and at least one movable flap provided within the plenum chamber to reduce an internal volume of the plenum chamber, wherein the at least one e flap is ed to separate the plenum chamber into a main chamber and at least one peripheral chamber, the main chamber comprising a main volume of the plenum chamber for ry of the therapy pressure, and the at least one peripheral chamber comprising a deadspace volume of the plenum chamber, n the main volume is adapted to be in direct fluid communication with at least the entrance to the patient’s nares, the heat and moisture exchanger, and the gas washout vent.
2. The patient interface according to claim 1, wherein the at least one moveable flap comprises an end portion adapted to form a seal with patient’s face. ResMed Ref: P1206NZ3 / Our ref: 506155NZDIV2
3. The patient interface according to any one of claims 1 to 2, wherein the at least one e flap is relatively flexible adapted to allow the at least one e flap to deform and/or flex to m to the patient’s face.
4. The patient interface according to any one of claims 1 to 3, wherein the at least one e flap is structured and arranged to obstruct flow between the main volume and the deadspace volume such that patient inhalation and patient exhalation throughout the patient’s respiratory cycle occurs via the main volume.
5. The patient ace ing to any one of claims 1 to 4, wherein the at least one movable flap is structured and arranged to direct expiratory flow away from the at least one peripheral chamber and through the heat and moisture exchanger.
6. The patient interface according to any one of claims 1 to 5, wherein the at least one movable flap is structured and arranged to direct inspiratory flow that has already flowed through the heat and re exchanger away from the at least one peripheral chamber and towards the patient’s airways.
7. The patient interface according to any one of claims 1 to 6, wherein the at least one movable flap is arranged to reduce the effective internal volume of the plenum chamber without altering the seal.
8. The patient ace according to any one of claims 1 to 7, wherein the at least one movable flap is arranged to reduce the volume of the main chamber for which the heat and moisture exchanger is provided to heat and humidify.
9. The patient interface according to any one of claims 1 to 8, wherein the deadspace volume is provided superior the entrance to the t’s nares.
10. The patient interface according to any one of claims 1 to 9, wherein the deadspace volume provided or the entrance to the patient’s mouth. ResMed Ref: P1206NZ3 / Our ref: 506155NZDIV2
11. The patient interface according to any one of claims 1 to 10, wherein the at least one movable flap includes an upper or superior movable flap arranged to establish an upper peripheral r adapted to be positioned generally above the t’s nares.
12. The patient interface according to any one of claims 1 to 11, n the at least one movable flap includes a lower or inferior movable flap arranged to establish a lower peripheral chamber adapted to be positioned generally below the patient’s lower lip.
13. The patient interface according to any one of claims 1 to 12, wherein the heat and moisture exchanger is supported by a front wall n of the cushion assembly. Nasai cavity Crai cavity Vocal folds Aiveoiar sacs Oesophagus Trachea \1i “Wiimlillli Bronchusummm_m“mm“mmmmmmmmm?mmmmmmmmm_m¥m/2 / M
NZ778166A 2016-07-18 Patient Interface with Volume Reducing Member NZ778166B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562194451P 2015-07-20 2015-07-20
NZ739176A NZ739176B2 (en) 2016-07-18 Patient interface with volume reducing member

Publications (2)

Publication Number Publication Date
NZ778166A NZ778166A (en) 2024-04-26
NZ778166B2 true NZ778166B2 (en) 2024-07-30

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