GB2607347A - A breathing assembly - Google Patents

A breathing assembly Download PDF

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Publication number
GB2607347A
GB2607347A GB2108038.7A GB202108038A GB2607347A GB 2607347 A GB2607347 A GB 2607347A GB 202108038 A GB202108038 A GB 202108038A GB 2607347 A GB2607347 A GB 2607347A
Authority
GB
United Kingdom
Prior art keywords
conduit
assembly according
breathing assembly
breathing
inner conduit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB2108038.7A
Other versions
GB2607347B (en
GB202108038D0 (en
Inventor
Thomas Tudor
Rees-Whippey Daniel
Poormand Ghassem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexicare Group Ltd
Original Assignee
Flexicare Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flexicare Group Ltd filed Critical Flexicare Group Ltd
Priority to GB2108038.7A priority Critical patent/GB2607347B/en
Priority to GB2402037.2A priority patent/GB2625652A/en
Publication of GB202108038D0 publication Critical patent/GB202108038D0/en
Priority to GB2200453.5A priority patent/GB2607374B/en
Priority to US18/566,858 priority patent/US20240269420A1/en
Priority to PCT/GB2022/051398 priority patent/WO2022254214A1/en
Priority to EP22731288.1A priority patent/EP4346965A1/en
Publication of GB2607347A publication Critical patent/GB2607347A/en
Application granted granted Critical
Publication of GB2607347B publication Critical patent/GB2607347B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • A61M16/0875—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
    • 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
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • 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
    • 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
    • A61M16/0808—Condensation traps
    • 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
    • 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
    • A61M16/1075—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
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • 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
    • A61M16/04—Tracheal tubes
    • A61M16/0402—Special features for tracheal tubes not otherwise provided for
    • A61M16/0409—Special features for tracheal tubes not otherwise provided for with mean for closing the oesophagus
    • 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
    • A61M16/04—Tracheal tubes
    • A61M16/0465—Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters
    • 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
    • A61M2205/3633—General characteristics of the apparatus related to heating or cooling thermally insulated
    • 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
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7527—General characteristics of the apparatus with filters liquophilic, hydrophilic
    • 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
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7536—General characteristics of the apparatus with filters allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
    • 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
    • A61M2205/8262—Internal energy supply devices connectable to external power source, e.g. connecting to automobile battery through the cigarette lighter

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Hematology (AREA)
  • Emergency Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A breathing assembly for supplying gases to a patient includes a patient end connector 12; a chamber end connector 14; and a coaxial conduit assembly 18 extending between the patient end 12 and the chamber end 14 connectors. The coaxial conduit assembly 18 includes inner 20 and outer 22 conduits, the inner conduit 20 arranged within the outer conduit 22 so as to define a first flow passage 24 along the coaxial conduit assembly 18, and a second flow passage 26 along the coaxial conduit assembly 18 between the inner conduit 20 and the outer conduit 22. Inspiratory gases are conveyed along the first flow passage 24 and expiratory gases are conveyed along the second flow passage 26, in use, and the outer conduit 22 is at least partially formed from a water permeable material configured to allow water to flow therethrough. The permeable material may be configured to all flow of liquid water therethrough and restrict flow of respiratory gases.

Description

A Breathing Assembly
FIELD
The present teachings relate to a breathing assembly. 5 BACKGROUND Patients with compromised ability to breathe autonomously can have their respiration supported through a breathing system, i.e. through mechanical ventilation. Mechanical ventilation utilises externally generated positive air pressure to induce a pressure gradient to the lungs, leading to a flow in of air. This pressure gradient is varied cyclically, in order to mimic the normal respiration of a patient.
With mechanical ventilation, the patient must be connected to the source of the pressure change (e.g. a ventilator) through a breathing system.
In such assisted/support breathing, particularly in medical applications, the breathing system needs to be capable of supplying gases, known as inspiratory gases, to a patient at suitable temperature and humidity levels. In known breathing systems, the high humidity of the conveyed gases can result in the build-up of condensation within the conduits.
The present teachings seek to overcome or at least mitigate one or more problems associated with the prior art.
SUMMARY
According to a first aspect, there is provided a breathing assembly for supplying gases to a patient, the breathing assembly comprising: a patient end connector configured to be connectable to an airway device; a chamber end connector configured to be connectable to a humidification chamber and comprising an inspiratory inlet for receiving humidified inspiratory gases from the humidification chamber; and a coaxial conduit assembly extending between the patient end connector and the ventilator end connector and comprising inner and outer conduits, the inner conduit arranged within the outer conduit so as to define a first flow passage along the coaxial conduit assembly within the inner conduit and a second flow passage along the coaxial conduit assembly between the inner conduit and outer conduit, wherein the breathing assembly is configured such that inspiratory gases are conveyed along the first flow passage and expiratory gases are conveyed along the second flow passage, in use, and wherein the outer conduit is at least partially formed from a water permeable material configured to allow water to flow therethrough.
It will be appreciated that the airway device may be a catheter mount, an infraglottic airway (e.g. endotracheal tube, endobronchial tube, tracheostomy tube), or a supraglottic airway device (e.g. oropharyngeal airway, nasopharyngeal airway, and laryngeal mask airway).
In this arrangement, the second flow passage provides a thermal barrier between the inspiratory gas in the first flow passage and the ambient air, which facilitates maintaining the inspiratory gas at the required temperature.
Providing an outer conduit that is formed from a water permeable material that allows water to flow therethrough has been found to reduce the build-up of water in the second flow passage.
The water permeable material may be configured to allow flow of liquid water therethrough and configured to restrict flow of respiratory gases therethrough.
The water permeable material may be configured to restrict the flow of liquid water therethrough.
Providing an outer conduit that is formed from a water permeable material that allows water to flow therethrough and that allows, but restricts, the passage of liquid water and/or gases therethrough has been found to reduce the build-up of water and water vapour in the second flow passage.
Substantially all, e.g. an entirety, of the outer conduit may be formed from the water permeable material.
This has been found to enhance the breathability of the outer conduit, thereby further reducing the build-up of water and water vapour in the second flow passage.
The outer conduit may be self-supporting.
This removes the need for additional structural members to be mounted to the outer conduit to provide the necessary structural stiffness/rigidity.
The outer conduit may comprise a reinforcing arrangement.
This provides the outer conduit with improved structural stiffness/rigidity.
The reinforcing arrangement may comprise a corrugated region of the outer conduit, optionally wherein the corrugated region extends over an entirety of the elongate length of the outer conduit.
This removes the need for additional structural members to be mounted to the outer conduit to provide the necessary structural stiffness/rigidity.
The outer conduit may be configured to support the inner conduit.
The coaxial conduit assembly may comprise a spacing arrangement between the inner conduit and the outer conduit.
The spacing arrangement may comprise at least one spacing assembly provided along the elongate length of the coaxial conduit assembly.
The or each spacing assembly may comprise a plurality of spacing members positioned between the inner conduit and the outer conduit.
The plurality of spacing members may be equally spaced around the inner conduit.
The spacing members may project inwardly (i.e. radially inwardly) from the outer conduit.
The outer conduit may define an outer conduit wall having a thickness in the range 0.2mm to 1.0mm, optionally in the range 0.3mm to 0.9mm.
Providing an outer conduit wall in this range has been found to provide sufficient stiffness/rigidity of the outer conduit whilst providing a suitably water permeable outer conduit wall.
The water permeable material may be formed from an amphiphilic material.
This has been found to enhance the permeability of the outer conduit to water vapour and liquid water, thereby reducing the build-up of water and water vapour in the second flow passage.
The water permeable material may be formed from a hydrophobic and hydrophilic block co-polymer.
The water permeable material may be formed from a hydrophobic and hydrophilic poly (ethylene oxide) based block co-polymer.
This has been found to enhance the permeability of the outer conduit to water vapour and liquid water, thereby reducing the build-up of water and water vapour in the second flow passage.
The outer conduit may be configured to absorb water vapour and liquid water.
This has been found to further enhance the permeability of the outer conduit to water vapour and liquid water, thereby further reducing the build-up of water and water vapour in the second flow passage.
The inner conduit may be insufficiently strong to be self-supporting.
The inner conduit may be formed from a thermoplastic elastomer.
The inner conduit may be configured to prevent water and water vapour from flowing therethrough.
The inner conduit may be configured to prevent gases from flowing therethrough.
This arrangement enables the humidity of the inspiratory gases to be actively, rather than passively, controlled by the breathing assembly.
The inner conduit may comprise a reinforcing arrangement.
Incorporating a reinforcing arrangement enables the thickness of the wall of the inner conduit to be reduced, thus reducing the amount of material used in the inner 20 conduit.
The reinforcing arrangement may comprise a reinforcing rib extending around, e.g. helically around, the inner conduit.
This has been found to further improve reinforcement of the inner conduit.
The breathing assembly may comprise a heating arrangement configured and arranged to heat inspiratory gases flowing along the first flow passage, wherein the heating arrangement comprises a first heating member embedded within an inner conduit wall of the inner conduit.
This has been found to improve the packing of the breathing assembly. By arranging the first heating element within the wall of the inner conduit, the obstruction to flow of the inspiratory gases is reduced.
The first heating member may extend around, e.g. spiral around, the inner conduit wall of the inner conduit.
Arranging the first heating element as a spiral around the wall of the inner conduit has been found to provide more uniform heating of the inspiratory gases flowing within the inner conduit.
The first heating member may be configured and arranged to heat inspiratory gases flowing along the first flow passage and to heat expiratory gases flowing along the second flow passage.
Arranging the first heating element so as to heat both inspiratory and expiratory gases can reduce or remove the need for a separate heating arrangement for the expiratory gases.
The inner conduit may comprise a reinforcing rib extending therearound, and wherein the first heating member is embedded within the reinforcing rib.
Arranging the first heating element within the reinforcing rib has been found to improve the packing of the breathing assembly.
The breathing assembly may comprise a flow valve at or near the interface between the coaxial conduit assembly and the patient end connector, the flow valve configured to allow flow of inspiratory gases from the first flow to passage into the patient end connector and to direct expiratory gases flowing from the patient end connector to the coaxial conduit assembly into the second flow passage.
The breathing assembly may comprise a catheter mount connected to the patient end connector.
The breathing assembly may comprise a first temperature sensor at or near the patient end connector.
The first temperature sensor may be integrally formed with the patient end connector.
This has been found to improve the packing of the breathing assembly.
The inner conduit may comprise a reinforcing rib extending therearound, and wherein one or more electrical wires connected to the first temperature sensor are embedded within the reinforcing rib.
Arranging the electrical wires within the reinforcing rib has been found to improve the packing of the breathing assembly.
The breathing assembly may comprise a second temperature sensor at or near the ventilator end connector.
The second temperature sensor may be integrally formed with the ventilator end connector.
This has been found to improve the packing of the breathing assembly.
The heating arrangement may comprise a second heating member configured to heat gases flowing along the second flow passage, wherein the second heating element is either positioned in the second flow passage or is embedded within a wall of the outer conduit.
IS The breathing assembly may comprise an expiratory port for conveying expiratory gasses out of the breathing assembly, wherein the expiratory port is provided at or proximate to the patient end connector According to a second aspect, there is provided a breathing assembly for supplying gases to a patient, the breathing assembly comprising: a patient end connector configured to be connectable to an air way device; a ventilator end connector configured to be connectable to a humidification chamber and comprising an inspiratory inlet for receiving humidified inspiratory gases from the humidification chamber; a coaxial conduit assembly extending between the patient end connector and the ventilator end connector and comprising inner and outer conduits, the inner conduit arranged within the outer conduit so as to define a first flow passage along the coaxial conduit assembly within the inner conduit and a second flow passage along the coaxial conduit assembly between the inner conduit and outer conduit, wherein the first flow passage and second flow passage each convey one of inspiratory gases or expiratory gases, in use; and a heating arrangement for heating gases flowing along the coaxial conduit assembly, wherein the heating arrangement comprises a first heating member embedded within an inner conduit wall of the inner conduit, and wherein the first heating member is configured and arranged to heat gases flowing along the first flow passage and the second flow passage.
It will be appreciated that the airway device may be a catheter mount, an infraglottic airway (e.g. endotracheal tube, endobronchial tube, tracheostomy tube), or a supraglottic airway device (e.g. oropharyngeal airway, nasopharyngeal airway, and laryngeal mask airway).
This has been found to improve the packing of the breathing assembly. By arranging the first heating element within the wall (i.e. on the outer surface of the wall) of the inner conduit, the obstruction to flow of the inspiratory gases is reduced.
Arranging the first heating element so as to heat both inspiratory and expiratory gases can reduce or remove the need for a separate heating arrangement for the expiratory gases.
The first heating member may extend around, e.g. spiral around, the inner conduit wall.
This has been found to improve the uniformity of heating of the gases flowing within the coaxial conduit assembly.
Arranging the first heating element as a spiral around the wall of the inner conduit has been found to provide more uniform heating of the inspiratory gases flowing within the inner conduit.
The inner conduit may comprise a reinforcing rib extending therearound, and wherein the first heating member is embedded within the reinforcing rib.
Arranging the first heating element within the reinforcing rib has been found to improve the packing of the breathing assembly.
The first heating member may comprise two spaced apart heating elements, e.g. wires, embedded within the reinforcing rib.
This has been found to increase the amount of heating that is able to be applied, whilst improving the uniformity of heating of the gases flowing within the coaxial conduit assembly The heating arrangement may comprise a second heating member configured and arranged to heat gases flowing along the second flow passage, wherein the second heating member is either positioned in the second flow passage or is embedded within an outer conduit wall of the outer conduit.
This arrangement helps to further heat expiratory gases to reduce the build-up of water and water vapour in the second flow passage or to heat inspiratory gases to ensure that are provided to the patient at the correct temperature.
The breathing assembly may be configured such that inspiratory gases are conveyed along the first flow passage and expiratory gases are conveyed along the second flow passage, in use.
In this arrangement, the second flow passage provides a thermal barrier between the inspiratory gas in the first flow passage and the ambient air, which facilitates maintaining the inspiratory gas at the required temperature.
The outer conduit may be at least partially formed from a water permeable material configured to allow water to flow therethrough and configured to restrict flow of respiratory gases therethrough.
The water permeable material may be configured to restrict the flow of liquid water therethrough.
Providing an outer conduit that is formed from a water permeable material that allows water to flow therethrough and that allows, but restricts, the passage of liquid water therethrough has been found to reduce the build-up of water and water vapour in the second flow passage.
An entirety of the outer conduit may be formed from the water permeable material.
This has been found to enhance the breathability of the outer conduit, thereby further reducing the build-up of water and water vapour in the second flow passage.
The outer conduit may be self-supporting.
This removes the need for additional structural members to be mounted to the outer conduit to provide the necessary structural stiffness/rigidity.
The outer conduit may be configured to support the inner conduit.
The coaxial conduit assembly may comprise a spacing arrangement between the inner conduit and the outer conduit.
The spacing arrangement may comprise at least one spacing assembly provided along the elongate length of the coaxial conduit assembly.
The or each spacing assembly may comprise a plurality of spacing members positioned between the inner conduit and the outer conduit.
The plurality of spacing members may be equally spaced around the inner conduit.
The spacing members may project inwardly (i.e. radially inwardly) from the outer conduit.
The outer conduit may comprise a reinforcing arrangement.
This provides the outer conduit with improved structural stiffness/rigidity.
The reinforcing arrangement may comprise a corrugated region of the outer conduit.
The corrugated region may extend over an entirety of the elongate length of the outer conduit.
This removes the need for additional structural members to be mounted to the outer conduit to provide the necessary structural stiffness/rigidity.
The outer conduit may define an outer conduit wall having a thickness in the range 0.2mm to 1.0mm, optionally in the range 0.3mm to 0.9mm.
Providing an outer conduit wall in this range has been found to provide sufficient strength to the outer conduit whilst providing a suitably water permeable outer conduit wall.
The inner conduit may be insufficiently strong to be self-supporting. The inner conduit may be formed from a thermoplastic elastomer.
The inner conduit may be configured to prevent water and water vapour from flowing therethrough.
The inner conduit may be configured to prevent liquid water and air/gases from flowing therethrough.
This arrangement enables the humidity of the inspiratory gases to be actively, rather than passively, controlled by the breathing assembly.
The inner conduit may comprise a reinforcing arrangement.
Incorporating a reinforcing arrangement enables the thickness of the wall of the inner conduit to be reduced, thus reducing the amount of material used in the inner conduit.
The reinforcing arrangement may comprise a reinforcing rib extending around, e.g. helically around, the inner conduit.
This has been found to further improve reinforcement of the inner conduit.
The breathing assembly may comprise a flow valve at or near the interface between the coaxial conduit assembly and the patient end connector, the flow valve configured to allow flow of inspiratory gases from the first flow to passage into the patient end connector and to direct expiratory gases flowing from the patient end connector to the coaxial conduit assembly into the second flow passage.
The breathing assembly may comprise a catheter mount connected to the patient end connector.
The breathing assembly may comprise a first temperature sensor at or near the patient end connector.
The first temperature sensor may be integrally formed with the patient end 20 connector.
This has been found to improve the packing of the breathing assembly.
The inner conduit may comprise a reinforcing rib extending therearound, and wherein one or more electrical wires connected to the first temperature sensor are embedded within the reinforcing rib.
Arranging the electrical wires within the reinforcing rib has been found to improve the packing of the breathing assembly.
The breathing assembly may comprise a second temperature sensor at or near the ventilator end connector.
The second temperature sensor may be integrally formed with the ventilator end connector.
This has been found to improve the packing of the breathing assembly.
The heating arrangement may comprise a second heating member configured to heat gases flowing along the second flow passage, wherein the second heating element is either positioned in the second flow passage or is embedded within a wall of the outer conduit.
The breathing assembly may compriseg an expiratory port for conveying expiratory gasses out of the breathing assembly, wherein the expiratory port is provided at or proximate to the patient end connector.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments will now be described with reference to the accompanying drawings, in which: Figure 1 is an isometric view of a part of a breathing assembly according to an 15 embodiment; Figure 2 is a cross-sectional side view of the breathing assembly of Figure 1; Figure 3 is a cross-sectional partial view of the breathing assembly of Figure 1; Figure 4 is a cross-sectional partial view of the inner and outer conduits of the breathing assembly of Figure 1; Figure 5 is a partial cross-sectional partial view of the outer conduit of the breathing assembly of Figure 1; Figures 6A and 6B are a side view and a cross-sectional side view of an inner conduit of the breathing assembly of Figure 1.
DETAILED DESCRIPTION OF EMBODIMENT(S)
Referring firstly to Figures 1 and 2, a breathing assembly for supplying gases to a patient (not shown) is illustrated and is indicated generally at 10.
The breathing assembly 10 includes a patient end connector 12. Although not illustrated, the breathing assembly 10 may include a catheter mount connected to the patient end connector 12. The patient end connector 12 is configured to be connectable to an air way device. The patient end connector 12 may be configured to be connectable to a catheter mount. A catheter mount provides a connection to a patient interface such as a mouth piece, nasal mask, an endotracheal tube, an endobronchial tube, a tracheostomy tube, an oropharyngeal airway, a nasopharyngeal airway, or a laryngeal mask airway. The catheter mount, when fitted, transports both inspiratory gases to a patient and expiratory gases from a patient. The patient end connector 12 may be configured to be connectable directly to airway devices an infraglottic airway (e.g. endotracheal tube, endobronchial tube, tracheostomy tube) or a supraglottic airway device (e.g. oropharyngeal airway, nasopharyngeal airway, and laryngeal mask airway), or any other suitable airway device.
The breathing assembly 10 includes a chamber end connector 14. Although not illustrated, the breathing assembly 10 may be connected to a humidification chamber connected to the chamber end connector 14. Put another way, the chamber end connector 14 is configured to be connectable to a humidification chamber. The chamber end connector 14 includes an inspiratory inlet 16 for receiving inspiratory gases from the humidification chamber.
The breathing assembly 10 includes a coaxial conduit assembly 18. The coaxial conduit assembly 18 extends between the patient end connector 12 and the chamber end connector 14. The coaxial conduit assembly 18 includes an inner conduit 20 and an outer conduit 22. The inner conduit 20 is arranged within the outer conduit 22 so as to define a first flow passage 24 along the coaxial conduit assembly 18 within the inner conduit 20 and a second flow passage 26 along the coaxial conduit assembly 18 between the inner conduit 20 and outer conduit 22.
The breathing assembly 10 includes an expiratory port 28. The expiratory port 28 is provided for conveying expiratory gasses out of the breathing assembly 10. In the illustrated arrangement, the expiratory port 28 is provided on a collar 30 interposed between the chamber end connector 14 and the coaxial conduit assembly 18. In alternative arrangements, the expiratory port 28 may be provided on the chamber end connector 14 or may be provided on a region of the coaxial conduit assembly 18 adjacent to, i.e. close to, the chamber end connector 14. Put another way, the expiratory port 28 may be at or proximate to the chamber end connector 14.
The breathing assembly 10 includes an electrical connector 32 for connecting to an electrical source of power. The electrical connector 32 connects the breathing assembly 10 to a control system (not shown). As will be discussed in more detail below, the electrical connector 32 is connected to various components of the breathing assembly 10 such that the components of the breathing assembly 10 can be connected to the control system and/or to provide electrical power to the components of the breathing assembly 10.
Although not illustrated, the breathing assembly 10 may include a flow valve at or near the interface between the coaxial conduit assembly 18 and the patient end connector 12. The flow valve is provided to allow flow of inspiratory gases from the coaxial conduit assembly 18 into the patient end connector 12 and to direct expiratory gases flowing from the patient end connector 12 to the coaxial conduit assembly 18 into the desired first or second flow passage 24, 26.
In the illustrated arrangement, the breathing assembly 10 is configured such that inspiratory gases are conveyed along the first flow passage 24 and expiratory gases are conveyed along the second flow passage 26, in use. In this arrangement, the second flow passage 26 (i.e. the outer flow passage) provides a thermal barrier between the inspiratory gas in the first flow passage 24 and the ambient air, which facilitates maintaining the inspiratory gas at the required temperature (e.g. around 37 °C). It will be appreciated, however, that in alternative arrangements, the breathing assembly 10 may be configured such that inspiratory gases are conveyed along the second flow passage 26 and expiratory gases are conveyed along the first flow passage 24, in use.
The breathing assembly 10 includes a first sensor 34. The first sensor 34 is a temperature sensor. The first sensor 34 is positioned at or near the patient end connector 12. In the illustrated embodiment, the first temperature sensor 34 is integrally formed with the patient end connector 12. In alternative arrangements, however, it will be appreciated that the first temperature sensor 34 may be removable, e.g. disposable. The first sensor 34 is connected to the electrical connector 32. Put another way, the first sensor 34 is connectable to a control system (not shown) and/or an electrical source of power via the electrical connector 32. The first sensor 34 is connected to the electrical connector 32 via one or more wires (not shown) extending along the coaxial conduit assembly 18, for example embedded within a wall of the inner conduit 20 or outer conduit 22.
The breathing assembly 10 includes a second sensor 36. The second sensor 36 is a temperature sensor. The second sensor 36 is positioned at or near the chamber end connector 14. In the illustrated embodiment, the second sensor 36 is integrally formed with the chamber end connector 14. In alternative arrangements, however, it will be appreciated that the second temperature sensor 36 may be removable, e.g. disposable. The second sensor 36 is connected to the electrical connector 32. Put another way, the second sensor 36 is connectable to a control system (not shown) and/or an electrical source of power via the electrical connector 32.
Referring now to Figure 3, the coaxial conduit assembly 18 includes inner and outer conduits 20, 22. The outer conduit 22 is at least partially formed from a water permeable material. A water permeable material is one that is configured to allow water to flow therethrough. It will be appreciated that a majority of the outer conduit 22 may be formed from the water permeable material. In the present arrangement, substantially all, e.g. an entirety, of the outer conduit 22 is formed from the water permeable material.
The water permeable material may also be configured to restrict flow of liquid water therethrough and/or is configured to restrict flow of gases therethrough. Forming the outer conduit from a material allowing water to flow therethrough and that allows, but restricts, the passage of liquid water and/or gases therethrough has been found to reduce the build-up of water and water vapour in the second flow passage.
The outer conduit 22 is self-supporting. Put another way, the outer conduit 22 is sufficiently strong, or sufficiently study, so as to be self-supporting. In this way, no separate reinforcing members are required to be mounted/attached to the outer conduit 22 (which could be detrimental to the breathability of the outer conduit 22).
This helps to increase the area of the outer conduit 22 that is water permeable. The outer conduit 22 defines an outer conduit wall having a thickness in the range 0.2mm to 1.0mm, optionally in the range 0.3mm to 0.9mm.
The outer conduit 22 includes a reinforcing arrangement. Put another way, the outer conduit 22 is arranged so as to define a reinforcing formation. This provides the outer conduit 22 with improved structural strength. The reinforcing arrangement is provided in the form of a corrugated region 38 of the outer conduit (i.e. the conduit wall of the outer conduit is corrugated). In the illustrated arrangement, the corrugated region extends over an entirety of the elongate length of the outer conduit 22. The corrugations in the outer conduit 22 work to increase the overall surface area of the water permeable outer conduit 22, thus increasing the area through which water within outer flow path can pass out of the breathing assembly 10.
The water permeable material of the outer conduit 22 is formed from an amphiphilic material. The water permeable material is formed from an amphiphilic block co-polymer. Put another way, the water permeable material is formed from a hydrophobic and hydrophilic block co-polymer. An example of one such material is a hydrophobic and hydrophilic poly (ethylene oxide) based block co-polymer. Further examples is suitable water permeable materials are: water permeable polytetrafluoroethylene (PTFE); Nafion (RTM); Sympatex (RTM); Arnitel (RTM); Diaplex (RTM); water permeable Hytrel (RTM); and Goretex (RTM), and it will be appreciated that any suitable water permeable material may be used.
In some arrangements, the water permeable material may be configured to absorb water vapour and liquid water. This has been found to further enhance the permeability of the outer conduit 22 to water vapour and liquid water, thereby further reducing the build-up of water and water vapour in the second flow passage.
In the present arrangement, the inner conduit 20 is insufficiently strong to be self-supporting. Put another way, the conduit wall of the inner conduit may have a low wall thickness (i.e. less than the outer conduit 22 wall thickness) such that the inner conduit 20 is insufficiently strong, or insufficiently study, so as to be self-supporting.
The inner conduit 20 is configured to prevent water and water vapour from flowing therethrough. The inner conduit 20 may be configured to prevent gases from flowing therethrough. As there is no transmission of moisture between the inspiratory and expiratory gases, the humidity of the inspiratory gases is able to be actively, rather than passively, controlled by the breathing assembly 10. In the present arrangement, the inner conduit 20 is formed from a thermoplastic elastomer. However, in alternative arrangements, it will be appreciated that any suitable material may be used such as thermoplastic extrudable polymers, for example polyethylene or polyurethane.
The inner conduit 20 is provided with a reinforcing arrangement. Incorporating a reinforcing arrangement on the inner conduit 20 enables the thickness of the wall of the inner conduit 20 to be reduced, thus reducing the amount of material used in the inner conduit 20. The reinforcing arrangement is provided in the form of a reinforcing rib 40. The reinforcing rib 40 extends around the inner conduit 20. In the illustrated arrangement, the reinforcing rib 40 extended helically (i.e. spirals) around the inner conduit 20.
Referring now to Figures 4 and 5, the coaxial conduit assembly 18 includes a spacing arrangement between the inner conduit 20 and the outer conduit 22. The spacing arrangement includes a spacing assembly 48. The spacing arrangement may be provided with an array of spacing assemblies 48 along the elongate length of the coaxial conduit assembly 18.
Each spacing assembly 48 has a plurality of spacing members 50 positioned between the inner conduit 20 and the outer conduit 22. The plurality of spacing members 50 are equally spaced around the inner conduit 20. In the illustrated arrangement, four spacing members 50 are provided, but it will be appreciated that any suitable number of spacing members 50 may be provided such as three, five or more spacing members 50.
The spacing members 50 are configured and arranged to support the inner conduit 22. Put another way, the outer conduit 22 is configured to support the inner conduit 20. In the illustrated arrangement, the spacing members 50 project inwardly (i.e. radially inwardly) from the outer conduit 22. In alternative arrangements, the spacing members 50 may be separate from, but attached to, the inner conduit 20 and/or outer conduit 22.
Referring now to Figures 6A and 65, the breathing assembly 10 includes a heating arrangement for heating gases flowing along the coaxial conduit assembly 18.
The heating arrangement includes a first heating member 42. The first heating member 42 is configured and arranged to heat gases flowing along the first flow passage 24 and the second flow passage 26. The first heating member 42 is provided in the form of two spaced apart heating elements 44, e.g. wires. The first heating member 42 is embedded with the wall of the inner conduit 20. The first heating member 42 extends around, e.g. spirals around, the inner conduit wall of the inner conduit 20. In the illustrated arrangement, the first heating member 42 is embedded within the reinforcing rib 40. Put another way, the inner conduit 20 includes a reinforcing rib 40 having the first heating member 42 therein.
One or more electrical wires 46 are embedded in the wall of the inner conduit 20. The electrical wires 46 provide an electrical connection between the first sensor 34 and the electrical connector 32. In the illustrated embodiment, two electrical wires 46 are embedded in the wall of the inner conduit 20. The electrical wire(s) 46 extend around, e.g. spiral around, the inner conduit wall of the inner conduit 20. In the illustrated arrangement, the one or more electrical wires 46 are embedded within the reinforcing rib 40. It will be appreciated in alternative arrangements that the one or more electrical wires 46 may be embedded in the wall of the inner conduit 20 but not within the reinforcing rib 40 of the inner conduit 20, or may be positioned within the second flow passage 26.
The heating arrangement may include a second heating member. The second heating member may be configured to heat gases flowing along the second flow passage 26. It will be appreciated that the second heating element may either be positioned in the second flow passage 26 or may be embedded within a wall of the outer conduit 22.
Although not illustrated, it will be appreciated that the breathing assembly may be connected to a ventilator and a humidification chamber as a part of a breathing system. In such breathing systems, the humidification chamber will be arranged to be between the ventilator and the chamber end connector 14.
During inspiration, the ventilator (not shown) is vented through a limb to the humidification chamber. The inspiratory gases flowing through the humidification chamber are heated and humidified. The inspiratory gases then flow through the chamber end connector 14 and into the coaxial conduit assembly 18. The inspiratory gases are directed to flow along the inspiratory flow path (e.g. along the first flow passage 24 in the illustrated embodiment) and to the patient end connector 12. The inspiratory gases flow through the patient end connector 12 and are conveyed to a patient, e.g. via a catheter mount.
During expiration, expiratory gases are conveyed from the patient, e.g. via a catheter mount, to the patient end connector 12. The expiratory gases are then directed to flow along the expiratory flow path (e.g. along the second flow passage 26 in the illustrated embodiment) by the flow valve. Expiratory gases then flow along the coaxial conduit assembly 18 and flow out of the breathing assembly 10 through the expiratory port 28, releasing the expiratory gasses to the atmosphere.
Although the teachings have been described above with reference to one or more preferred embodiments, it will be appreciated that various changes or modifications may be made without departing from the scope as defined in the appended claims.

Claims (25)

  1. Claims 1. A breathing assembly for supplying gases to a patient, the breathing assembly comprising: a patient end connector configured to be connectable to an airway device; a chamber end connector configured to be connectable to a humidification chamber and comprising an inspiratory inlet for receiving humidified inspiratory gases from the humidification chamber; and a coaxial conduit assembly extending between the patient end connector and the ventilator end connector and comprising inner and outer conduits, the inner conduit arranged within the outer conduit so as to define a first flow passage along the coaxial conduit assembly within the inner conduit and a second flow passage along the coaxial conduit assembly between the inner conduit and outer conduit, wherein the breathing assembly is configured such that inspiratory gases are conveyed along the first flow passage and expiratory gases are conveyed along the second flow passage, in use, and wherein the outer conduit is at least partially formed from a water permeable material configured to allow water to flow therethrough.
  2. 2. The breathing assembly according to claim 1, wherein the water permeable material is configured to allow flow of liquid water therethrough and configured to restrict flow of respiratory gases therethrough.
  3. 3. The breathing assembly according to claim 1 or claim 2, wherein substantially all, e.g. an entirety, of the outer conduit is formed from the water permeable material.
  4. 4. The breathing assembly according to any preceding claim, wherein the outer conduit is self-supporting, optionally wherein the outer conduit comprises a reinforcing arrangement.
  5. 5. The breathing assembly according to any preceding claim, wherein the outer conduit comprises a corrugated region of the outer conduit, optionally wherein the corrugated region extends over an entirety of the elongate length of the outer conduit.
  6. 6. The breathing assembly according to any preceding claim, wherein the outer conduit is configured to support the inner conduit.
  7. 7. The breathing assembly according to any preceding claim, wherein the coaxial conduit assembly comprises a spacing arrangement between the inner conduit and the outer conduit.
  8. 8. The breathing assembly according to claim 7, wherein the spacing arrangement comprises at least one spacing assembly provided along the elongate length of the coaxial conduit assembly, wherein the or each spacing assembly comprises a plurality of spacing members positioned between the inner conduit and the outer conduit, optionally, wherein the plurality of spacing members are equally spaced around the inner conduit.
  9. 9. The breathing assembly according to claim 8, wherein the spacing members project inwardly (i.e. radially inwardly) from the outer conduit.
  10. 10. The breathing assembly according to any preceding claim, wherein the outer conduit defines an outer conduit wall having a thickness in the range 0.2mm to 1.0mm, optionally in the range 0.3mm to 0.9mm.
  11. 11. The breathing assembly according to any preceding claim, wherein the water permeable material is formed from an amphiphilic material.
  12. 12. The breathing assembly according to claim 11, wherein the water permeable material is formed from a hydrophobic and hydrophilic block co-polymer, optionally a hydrophobic and hydrophilic poly (ethylene oxide) based block co-polymer.
  13. 13. The breathing assembly according to any preceding claim, wherein the outer conduit is configured to absorb water vapour and liquid water.
  14. 14. The breathing assembly according to any preceding claim, wherein the inner conduit is formed from a thermoplastic elastomer.
  15. 15. The breathing assembly according to any preceding claim, wherein the inner conduit is configured to prevent water and water vapour from flowing therethrough, optionally wherein the inner conduit is configured to prevent gases from flowing therethrough.
  16. 16. The breathing assembly according to any preceding claim, wherein the inner conduit comprises a reinforcing arrangement, optionally wherein the reinforcing arrangement comprises a reinforcing rib extending around, e.g. helically around, the inner conduit.
  17. 17.The breathing assembly according to any preceding claim, comprising a heating arrangement configured and arranged to heat inspiratory gases flowing along the first flow passage, wherein the heating arrangement comprises a first heating member embedded within an inner conduit wall of the inner conduit, optionally wherein the inner conduit comprises a reinforcing rib extending therearound, and wherein the first heating member is embedded within the reinforcing rib.
  18. 18. The breathing assembly according to claim 17, wherein the first heating member extends around, e.g. spirals around, the inner conduit wall of the inner conduit.
  19. 19. The breathing assembly according to claim 17 or claim 18, wherein the first heating member is configured and arranged to heat inspiratory gases flowing along the first flow passage and to heat expiratory gases flowing along the second flow passage.
  20. 20. The breathing assembly according to any preceding claim, comprising a catheter mount connected to the patient end connector.
  21. 21. The breathing assembly according to any preceding claim, comprising a first temperature sensor at or near the patient end connector, optionally wherein the first temperature sensor is integrally formed with the patient end connector.
  22. 22. The breathing assembly according to claim 21, wherein the inner conduit comprises a reinforcing rib extending therearound, and wherein one or more electrical wires connected to the first temperature sensor are embedded within the reinforcing rib.
  23. 23.The breathing assembly according to any preceding claim, comprising a second temperature sensor at or near the ventilator end connector, optionally wherein the second temperature sensor is integrally formed with the ventilator end connector.
  24. 24.The breathing assembly according to any preceding claim, wherein the heating arrangement comprises a second heating member configured to heat gases flowing along the second flow passage, wherein the second heating element is either positioned in the second flow passage or is embedded within a wall of the outer conduit.
  25. 25.The breathing assembly according to any preceding claim, comprising an expiratory port for conveying expiratory gasses out of the breathing assembly, wherein the expiratory port is provided at or proximate to the patient end connector
GB2108038.7A 2021-06-04 2021-06-04 A breathing assembly Active GB2607347B (en)

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GB2108038.7A GB2607347B (en) 2021-06-04 2021-06-04 A breathing assembly
GB2402037.2A GB2625652A (en) 2021-06-04 2021-06-04 A breathing assembly
GB2200453.5A GB2607374B (en) 2021-06-04 2022-01-14 A Breathing Assembly
PCT/GB2022/051398 WO2022254214A1 (en) 2021-06-04 2022-06-01 A breathing assembly
US18/566,858 US20240269420A1 (en) 2021-06-04 2022-06-01 A breathing assembly
EP22731288.1A EP4346965A1 (en) 2021-06-04 2022-06-01 A breathing assembly

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040118401A1 (en) * 2000-06-21 2004-06-24 Smith Daniel John Conduit with heated wick
US20090025724A1 (en) * 2007-07-16 2009-01-29 Herron Jr Roy Howard System for removal of water from a hose and the hygroscopic hose utilized
WO2011077250A1 (en) * 2009-12-22 2011-06-30 Fisher & Paykel Healthcare Corporation Limited Components for medical circuits
US20180110955A1 (en) * 2016-10-26 2018-04-26 Teleflex Medical Incorporated System and method for on-demand near-patient humidification
US20180280650A1 (en) * 2017-03-31 2018-10-04 Koninklijke Philips N.V. Moisture wicking conduit and system
WO2020094741A1 (en) * 2018-11-08 2020-05-14 Plastiflex Group Moisture permeable conduit for a breathing circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967744A (en) * 1988-11-03 1990-11-06 Airoflex Medical, Inc. Flexible breathing circuit
BR0102116B1 (en) * 2000-05-10 2010-09-21 component for a breathing circuit member.
EP4026580A1 (en) * 2012-03-30 2022-07-13 Fisher & Paykel Healthcare Limited Circuit assembly and humidification system
WO2017070696A1 (en) * 2015-10-24 2017-04-27 Kings Systems Corporation Breathing circuit systems and devices
CN110755726A (en) * 2019-10-21 2020-02-07 斯莱达医疗用品（惠州）有限公司 Coaxial heating breathing pipeline
AU2021221439A1 (en) * 2020-12-23 2022-07-07 Fisher & Paykel Healthcare Limited Tube and/or patient interface for delivery of gas

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040118401A1 (en) * 2000-06-21 2004-06-24 Smith Daniel John Conduit with heated wick
US20090025724A1 (en) * 2007-07-16 2009-01-29 Herron Jr Roy Howard System for removal of water from a hose and the hygroscopic hose utilized
WO2011077250A1 (en) * 2009-12-22 2011-06-30 Fisher & Paykel Healthcare Corporation Limited Components for medical circuits
US20180110955A1 (en) * 2016-10-26 2018-04-26 Teleflex Medical Incorporated System and method for on-demand near-patient humidification
US20180280650A1 (en) * 2017-03-31 2018-10-04 Koninklijke Philips N.V. Moisture wicking conduit and system
WO2020094741A1 (en) * 2018-11-08 2020-05-14 Plastiflex Group Moisture permeable conduit for a breathing circuit

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GB2607347B (en) 2024-03-27
GB202108038D0 (en) 2021-07-21
GB2607374B (en) 2023-09-20
GB2607374A9 (en) 2023-01-11
GB2607374A (en) 2022-12-07

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