NZ735636B2 - Patient interface with blowout prevention for seal-forming portion - Google Patents

Patient interface with blowout prevention for seal-forming portion Download PDF

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Publication number
NZ735636B2
NZ735636B2 NZ735636A NZ73563616A NZ735636B2 NZ 735636 B2 NZ735636 B2 NZ 735636B2 NZ 735636 A NZ735636 A NZ 735636A NZ 73563616 A NZ73563616 A NZ 73563616A NZ 735636 B2 NZ735636 B2 NZ 735636B2
Authority
NZ
New Zealand
Prior art keywords
sealing structure
patient
sealing
region
plenum chamber
Prior art date
Application number
NZ735636A
Other versions
NZ735636A (en
Inventor
Matthew Eves
Lemmy Nga
Gerard Michael Rummery
Rupert Christian Scheiner
Original Assignee
ResMed Pty Ltd
Filing date
Publication date
Application filed by ResMed Pty Ltd filed Critical ResMed Pty Ltd
Priority to NZ774236A priority Critical patent/NZ774236A/en
Priority to NZ774240A priority patent/NZ774240A/en
Priority to NZ774237A priority patent/NZ774237A/en
Priority to NZ774241A priority patent/NZ774241B2/en
Priority to NZ774239A priority patent/NZ774239A/en
Priority to NZ774238A priority patent/NZ774238A/en
Priority claimed from PCT/AU2016/050228 external-priority patent/WO2016149769A2/en
Publication of NZ735636A publication Critical patent/NZ735636A/en
Publication of NZ735636B2 publication Critical patent/NZ735636B2/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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • A61M16/0069—Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
    • 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0605—Means for improving the adaptation of the mask to the 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; 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
    • A61M16/0622—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 having an underlying cushion
    • 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0605—Means for improving the adaptation of the mask to the patient
    • A61M16/0633—Means for improving the adaptation of the mask to the patient with forehead support
    • 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0666—Nasal cannulas or tubing
    • 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0825—Joints or connectors with ball-sockets
    • 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
    • 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. mouth-to-mouth respiration; 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
    • 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
    • A61M2205/42—Reducing noise
    • 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
    • A61M2207/00—Methods of manufacture, assembly or production
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0618—Nose

Abstract

One form of the present technology includes a sealing structure to seal against a user's face around the user's airways. The invention involves a patient interface (and an associated assembly thereof) that comprises a plenum chamber with a plenum chamber inner port, a sealing structure configured to contact and seal against a patient's face and is bonded to the plenum chamber, a positioning and stabilising structure having a decoupling feature which prevents the sealing structure to break seal and a washout vent structure configured to allow a continuous vent flow. The sealing structure includes a flap or membrane that extends inward towards the user's airways and includes a structure that prevents an inner boundary of the flap or membrane from being blown outwards (e.g., folded backwards upon itself) due to internal pressurization.

Claims (24)

1. A patient interface comprising: a plenum chamber pressurisable to a therapeutic pressure of at least 6cmH2O above t air pressure, said plenum chamber including a plenum chamber inlet port, said plenum chamber inlet port being sized and structured to e a flow of air at the therapeutic pressure for breathing by a patient; a sealing structure having a sealing surface configured to contact and seal against a region of the patient’s face surrounding an entrance to the t’s airways such that the flow of air at said therapeutic re is delivered to at least an entrance to the patient’s nares, the sealing structure being ured and arranged to maintain said therapeutic re in the plenum chamber hout the patient’s respiratory cycle in use, and the sealing ure being bonded to the plenum chamber at a bonding region; a positioning and stabilising structure configured to hold the sealing structure in a therapeutically effective on on the patient’s head while the patient is lying in a side sleeping on and while the patient is lying in a supine sleeping position, the positioning and stabilising structure including a decoupling feature configured to decouple an anterior portion and a posterior portion of the positioning and ising structure so that in use when the patient is lying in a supine sleeping position the positioning and stabilizing structure does not cause the sealing structure to break seal; a washout vent structure configured to allow a continuous vent flow from an interior of the plenum chamber to ambient whilst the pressure within the plenum chamber is positive with respect to ambient, said washout vent structure being configured such that a vent flow rate of the continuous vent flow has a magnitude sufficient to help reduce rebreathing of exhaled CO2 by the patient during both patient inhalation and patient tion while maintaining the therapeutic pressure in the plenum chamber in use, wherein the sealing structure comprises a pair of ties, each of the ties being positioned on a corresponding lateral side of the sealing structure, a first end portion of 506125NZ each of the ties being fastened to a first interior surface region on the corresponding lateral side of the sealing structure that is distal to the bonding region and a second end portion of each of the ties being fastened to a second interior surface region on the corresponding l side of the sealing structure that is proximal to the bonding region such that each of the ties resists deformation of the sealing structure to prevent blowout, wherein each of the ties comprises an inner e located between the first end portion and the second end portion and the sealing structure comprises an interior surface located between the first interior surface region and the second interior surface region, the inner surface of each of the ties being adjacent to and separated from the interior surface of the sealing structure.
2. The patient interface of claim 1, wherein the ties and the sealing structure comprise a unitary ure formed from a homogeneous material.
3. The patient interface of claim 2, wherein the homogeneous material is silicone
4. The patient interface of any one of claims 1 to 3, wherein the sealing structure comprises a sealing flap at an edge , the sealing flap being shaped and positioned to seal at least against a side of the patient’s nose in use.
5. The patient interface of claim 4, wherein the sealing flap comprises a thin edge region that is thinner than adjacent regions of the sealing structure.
6. The patient interface of claim 4, wherein the first interior surface region is nt to the sealing flap such that each of the ties is spaced ly from the edge region of the sealing flap.
7. The patient interface of any one of claims 1 to 6, wherein the plenum chamber is constructed from a rigid, transparent material.
8. The t interface of any one of claims 1 to 7, wherein each of the ties extends n the first interior surface region and the second interior surface region of the 506125NZ sealing structure such that each of the ties is positioned proximal to the patient’s corresponding frontal process of the a in use.
9. The patient interface of any one of claims 1 to 8, wherein each of the ties extends from the first interior surface region of the sealing structure inferior to an uppermost portion of the sealing structure and superior to a lowermost portion of the sealing structure.
10. The patient interface of any one of claims 1 to 9, wherein the sealing structure is configured so as not to not extend below a mental protuberance region in use and the plenum chamber is configured so as not to cover the patient’s eyes in use.
11. The patient interface of any one of claim 1 to 10, wherein the g structure is a single wall sealing structure.
12. The patient interface of any one of claims 1 to 11, wherein the sealing ure does not include an undercushion.
13. An assembly for a patient interface comprising: a plenum chamber pressurisable to a therapeutic pressure of at least 6cmH2O above ambient air pressure, said plenum chamber including a plenum chamber inlet port, said plenum chamber inlet port being sized and structured to receive a flow of air at the eutic re for breathing by a patient; and a sealing ure having a sealing surface configured to contact and seal t a region of the patient’s face surrounding an entrance to the patient’s airways such that the flow of air at said therapeutic pressure is delivered to at least an entrance to the patient’s nares, the sealing structure ured and arranged to maintain said therapeutic pressure in the plenum chamber throughout the patient’s respiratory cycle in use , and the sealing structure being bonded to the plenum r at a bonding region; wherein the sealing ure ses a pair of connecting portions, each lateral half of the sealing ure having one of the connecting portions, each of the connecting portions joining a first interior surface region of the sealing structure that is distal to the g region to a second interior surface region of the sealing structure that is proximal to the bonding region such that each of the connecting portions is configured to limit displacement of the first interior e region ve to the second interior surface region to prevent t of the sealing structure during therapy, and wherein each of the connecting portions comprises an inner e located between a first end portion and a second end portion and the sealing structure comprises an interior surface located between the first interior surface region and the second interior surface region, the inner surface of each of the connecting portions being nt to and separated from a corresponding portion of the interior surface of the sealing structure.
14. The assembly of claim 13, n the pair of connecting portions and the sealing structure comprise a unitary structure formed from a homogeneous material.
15. The assembly of claim 14, wherein the homogeneous material is silicone rubber.
16. The assembly of any one of claims 13 to 15, wherein the sealing structure comprises a sealing flap at an edge region, the sealing flap being shaped and positioned to seal at least against a side of the patient’s nose in use.
17. The assembly of claim 16, wherein the sealing flap comprises a thin edge region that is thinner than adjacent regions of the sealing structure.
18. The ly of claim 17, wherein the first interior surface region is adjacent to the sealing flap such that each of the connecting portions is spaced inwardly from the edge region of the sealing flap.
19. The assembly of any one of claims 13 to 18, wherein the plenum chamber is constructed from a rigid, transparent material.
20. The assembly of any one of claims 13 to 19, wherein each of the connecting portions extends between the first interior e region and the second interior surface region of the sealing structure such that each of the connecting portions is positioned proximal to the t’s l process of the maxilla in use.
21. The assembly of any one of claims 13 to 20, wherein each of the connecting portions extends from the first interior surface region of the g structure inferior to an uppermost portion of the sealing structure and superior to a lowermost portion of the g structure.
22. The assembly of any one of claims 13 to 21, wherein the sealing structure is configured so as not to not extend below a mental protuberance region in use and the plenum chamber is configured so as not to cover the t’s eyes in use.
23. The assembly of any one of claims 13 to 22, wherein the sealing structure is a single wall sealing structure.
24. The assembly of any one of claims 13 to 23, wherein the sealing structure does not include an undercushion. 4000 5000 4170 3000 1000 1100 1000 3000 4170 5000 4000 4000 5000 4170 Nasal cavity Oral cavity Larynx Vocal folds Alveolar sacs Oesophagus Trachea Bronchus Heart Diaphragm ght 2012 ResMed Limited Nasal cavity Nasal bone Lateral nasal cartilage Greater alar cartilage Hard palate Nostril Soft palate Lip superior Lip inferior Oropharynx Tongue Epiglottis Vocal folds Larynx Esophagus Trachea ght 2012 ResMed Limited Sagittal plane Superior Inferior Right Left Endocanthion Nasal ala Lip Superior Nasolabial sulcus Upper Vermillion Lower Vermillion Cheilion Lip Inferior Mouth width radially inward radially outward ght 2012 ResMed Limited Otobasion superior Otobasion inferior Alar crest point Glabella Pronasale Subnasale Sellion Posterior Ridge Lip superior Lip Inferior Supramenton Superior Inferior Anterior Copyright 2012 ResMed Limited Coronal plane Frankfort horizontal Nasolabial angle Posterior or Inferior Anterior Copyright 2012 ResMed Limited Saggital plane Pronasale columella Subnasale Naris Major axis of naris Upper vermillion Lip inferior Naso-labial sulcus Copyright 2012 ResMed Limited
NZ735636A 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion NZ735636B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NZ774236A NZ774236A (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion
NZ774240A NZ774240A (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion
NZ774237A NZ774237A (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion
NZ774241A NZ774241B2 (en) 2016-03-24 Patient Interface with Blowout Prevention for Seal-Forming Portion
NZ774239A NZ774239A (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion
NZ774238A NZ774238A (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201562138009P 2015-03-25 2015-03-25
US201562222503P 2015-09-23 2015-09-23
PCT/AU2016/050228 WO2016149769A2 (en) 2015-03-25 2016-03-24 Patient interface with blowout prevention for seal-forming portion

Publications (2)

Publication Number Publication Date
NZ735636A NZ735636A (en) 2023-11-24
NZ735636B2 true NZ735636B2 (en) 2024-02-27

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