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NZ784833B2 - Heat and moisture exchanger for a patient interface - Google Patents
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NZ784833B2 - Heat and moisture exchanger for a patient interface - Google Patents

Heat and moisture exchanger for a patient interface Download PDF

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Publication number
NZ784833B2
NZ784833B2 NZ784833A NZ78483314A NZ784833B2 NZ 784833 B2 NZ784833 B2 NZ 784833B2 NZ 784833 A NZ784833 A NZ 784833A NZ 78483314 A NZ78483314 A NZ 78483314A NZ 784833 B2 NZ784833 B2 NZ 784833B2
Authority
NZ
New Zealand
Prior art keywords
p942nz6
patient
patient interface
interface system
flow
Prior art date
Application number
NZ784833A
Other versions
NZ784833A (en
Inventor
Matthew Rolf Harrington
Original Assignee
ResMed Pty Ltd
Filing date
Publication date
Application filed by ResMed Pty Ltd filed Critical ResMed Pty Ltd
Publication of NZ784833A publication Critical patent/NZ784833A/en
Publication of NZ784833B2 publication Critical patent/NZ784833B2/en

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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
    • A61M16/0057—Pumps 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
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A61M16/026—Control means therefor including calculation means, e.g. using a processor specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
    • 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
    • A61M16/0683—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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/1055—Filters bacterial
    • 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
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • 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
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/109—Preparation of respiratory gases or vapours by influencing the temperature the humidifying liquid or the beneficial agent
    • 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
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • 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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • 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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A61M2016/0036—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the breathing tube and used in both inspiratory and expiratory phase
    • 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
    • A61M2205/21—General characteristics of the apparatus insensitive to tilting or inclination, e.g. spill-over prevention
    • 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
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3365—Rotational speed
    • 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
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • 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
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance
    • 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
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/52—General characteristics of the apparatus with microprocessors or computers with memories providing a history of measured variating parameters of apparatus or patient
    • 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
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8206—Internal energy supply devices battery-operated

Abstract

patient interface system configured for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to a patient’s airways including at least the patient’s nares, wherein the patient interface system is configured to maintain a therapeutic 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 system comprising: a patient interface comprising: a plenum chamber configured to be pressurised at the therapeutic pressure in use; a seal forming structure connected to the plenum chamber and configured to seal with an area around the entrance to the patient’s airways including at least the patient’s nares, the seal forming structure being constructed from a soft, flexible, resilient material; a positioning and stabilising structure comprising at least one strap and being configured to maintain the seal forming structure in sealing contact with the area surrounding the entrance to the patient’s airways while maintaining the therapeutic pressure at the entrance to the patient’s airways; a connection port configured to connect to an air circuit; and a gas washout vent configured to allow a flow of patient exhaled gas to escape to ambient air to minimise rebreathing of exhaled carbon dioxide by the patient; and a heat and moisture exchanger (HME), positioned inside of the plenum chamber and that includes a rigid frame and an HME material, the HME material being moisture-absorbent and positioned inside of the rigid frame, the rigid frame including at least one engagement member configured to releasably engage the plenum chamber such that the HME is removably connectable to the plenum chamber.

Description

A patient interface system configured for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to a patient’s airways including at least the patient’s nares, wherein the patient interface system is configured to maintain a therapeutic 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 system comprising: a patient interface comprising: a plenum chamber configured to be pressurised at the therapeutic pressure in use; a seal forming structure connected to the plenum chamber and configured to seal with an area around the entrance to the patient’s airways including at least the patient’s nares, the seal forming structure being constructed from a soft, flexible, resilient material; a positioning and stabilising structure comprising at least one strap and being configured to maintain the seal forming structure in sealing contact with the area surrounding the entrance to the patient’s airways while maintaining the therapeutic pressure at the entrance to the patient’s airways; a connection port configured to connect to an air circuit; and a gas washout vent configured to allow a flow of patient exhaled gas to escape to ambient air to minimise rebreathing of exhaled carbon dioxide by the patient; and a heat and moisture exchanger (HME), positioned inside of the plenum chamber and that includes a rigid frame and an HME material, the HME material being moisture-absorbent and positioned inside of the rigid frame, the rigid frame including at least one engagement member configured to releasably engage the plenum chamber such that the HME is removably connectable to the plenum chamber.
NZ 784833 B2 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6

Claims (21)

1. A patient interface system configured for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to a patient’s airways including at least the patient’s nares, wherein the patient interface system is configured to maintain a therapeutic 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 system comprising: a patient interface comprising: a plenum chamber configured to be pressurised at the therapeutic pressure in use; a seal forming structure connected to the plenum chamber and configured to seal with an area around the entrance to the patient’s airways including at least the patient’s nares, the seal forming structure being constructed from a soft, flexible, resilient material; a positioning and stabilising structure comprising at least one strap and being configured to maintain the seal forming structure in sealing contact with the area surrounding the entrance to the patient’s airways while maintaining the therapeutic pressure at the entrance to the patient’s airways; a connection port configured to connect to an air circuit; and a gas washout vent configured to allow a flow of patient exhaled gas to escape to ambient air to minimise rebreathing of exhaled carbon dioxide by the patient; and a heat and moisture exchanger (HME), positioned inside of the plenum chamber and that includes a rigid frame and an HME material, the HME material being moisture-absorbent and positioned inside of the rigid frame, the rigid frame including at least one engagement member configured to releasably engage the plenum chamber such that the HME is removably connectable to the plenum chamber.. P942NZ6
2. The patient interface system of claim 1, wherein the rigid frame further comprises at least one retention member configured to hold the HME material within the rigid frame.
3. The patient interface system of claim 2, wherein the at least one retention member is configured to structurally support the rigid frame.
4. The patient interface system of claim 2 or claim 3, further comprising a first retention member positioned on a front side of the rigid frame and a second retention member positioned on a rear side of the rigid frame.
5. The patient interface system of any one of claims 1 to 4, wherein the at least one engagement member is configured to releasably engage the plenum chamber with a snap-fit.
6. The patient interface system of any one of claims 1 to 5, wherein the rigid frame further comprises at least one frame aperture oriented to allow the flow of air and/or the flow of patient exhaled gas to reach the HME material.
7. The patient interface system of claim 6, wherein the HME material includes a plurality of channels configured to allow the flow of air and the flow of patient exhaled gas to pass through HME material along a flow path, and wherein the at least one frame aperture is aligned with the flow path such that the flow of air and the flow of patient exhaled gas pass through the at least one frame aperture during use.
8. The patient interface system of any one of claims 1 to 7, wherein the HME material is supported relative to the patient interface such that during use: the flow of air travels in a first direction from the connection port, through the HME material, and to the patient’s airways; and P942NZ6 the flow of patient exhaled gas travels in a second direction, opposite the first direction, from the patient’s airways, through the HME material, and exits to atmosphere through the gas washout vent.
9. The patient interface system of claim 8, further comprising a baffle configured to separate the flow of air traveling in the first direction from the flow of patient exhaled gas traveling in the second direction.
10. The patient interface system of any one of claims 1 to 9, wherein the HME material comprises a plurality of layers arranged into a predetermined three- dimensional shape.
11. The patient interface system of claim 10, wherein each of the layers comprises a corrugated structure comprising a plurality of corrugations, the plurality of corrugations forming a plurality of channels to allow the flow of air along a surface of the corrugated structure for moisture exchange, wherein the corrugated structure is configured to retain moisture from a flow of expiratory gas such that the retained moisture is provided to the flow of air for humidification during use.
12. The patient interface system of claim 11, wherein the HME is oriented such that the plurality of channels are substantially parallel to a flow path of the flow of
13. The patient interface system of any one of claims 1 to 12, wherein the HME material consists of foam.
14. The patient interface system of any one of claims 1 to 12, wherein the HME material consists of paper. P942NZ6
15. The patient interface system of claim 14, wherein the paper HME material includes corrugations and the paper HME material is rolled into a coil.
16. The patient interface system of any one of claims 1 to 12, wherein the HME material comprises paper.
17. The patient interface system of any one of claims 1 to 12, wherein the HME material comprises foam.
18. The patient interface system of any one of claims 1 to 17, further comprising an auxiliary vent positioned on a patient side of the plenum chamber relative to the
19. The patient interface system of any one of claims 1 to 18, wherein the HME is positioned inside of the plenum chamber.
20. A respiratory therapy system to provide respiratory therapy to a patient, the respiratory therapy system comprising: a respiratory therapy device including a pressure generator configured to generate a flow of air at a continuously positive pressure with respect to ambient air pressure in a range of about 4 cmH2O to about 30 cmH2O above ambient air pressure in use; the patient interface system of any one of claims 1 to 19; and an air circuit configured to provide the flow of air from the respiratory therapy device to the patient interface system.
21. The respiratory therapy system of claim 20, wherein the respiratory therapy system does not include a humidifier. P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6 P942NZ6
NZ784833A 2014-07-29 Heat and moisture exchanger for a patient interface NZ784833B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2013902810A AU2013902810A0 (en) 2013-07-29 Patient interface system
NZ61387413 2013-08-07
NZ766846A NZ766846B2 (en) 2013-07-29 2014-07-29 Heat and moisture exchanger for a patient interface

Publications (2)

Publication Number Publication Date
NZ784833A NZ784833A (en) 2023-08-25
NZ784833B2 true NZ784833B2 (en) 2023-11-28

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