Breathing circuit components for respiratory apparatus

Patent metadata

Field	Value
Publication number	US-12102768-B2
Application number	US-201716307113-A
Country	US
Kind code	B2
Filing date	Jun 7, 2017
Priority date	Jun 7, 2016
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

In one embodiment, a breathing circuit component is provided and includes: an inlet; an outlet; and an enclosing wall defining a gases passageway between the inlet and the outlet, at least a region of the wall comprising a membrane that allows the passage of water vapour without substantially allowing the passage of liquid water or respiratory gases, wherein, the membrane has a thickness of about 35 to 45 micrometers.

First claim

The invention claimed is:

1. A breathing gas conduit for a respiratory apparatus including:
an inlet;
an outlet;
an enclosing wall defining a gases passageway between the inlet and the outlet, at least a region of the enclosing wall comprising a membrane that allows passage of water vapour without substantially allowing a passage of liquid water or respiratory gases, the membrane comprising a membrane wall thickness; and
a bead helically wound around the enclosing wall, the bead comprising a bead pitch defined by a distance between adjacent winds of the bead,
wherein the breathing gas conduit comprises a ratio of bead pitch to membrane wall thickness between 1:0.0080 to 1:0.0128 so as to reduce noise production when the breathing gas conduit is moved, flexed, or bent.

2. The breathing gas conduit of claim 1 , wherein the ratio of bead pitch to membrane thickness is between 1:0.0080 to 1:0.0118.

3. The breathing gas conduit of claim 1 , wherein the membrane wall thickness is at least 35 micrometers.

4. The breathing gas conduit of claim 1 , wherein the membrane wall thickness is between 35 micrometers and 40 micrometers.

5. The breathing gas conduit of claim 1 , wherein the breathing gas conduit is at least one of: an inspiratory gas conduit, an expiratory gas conduit, and a portion of a gas conduit configured to be positioned between the inspiratory gas conduit and a patient interface.

6. The breathing gas conduit of claim 1 , wherein the breathing gas conduit comprises at least one of: a conduit connector, a conduit adaptor, and a catheter mount.

7. The breathing gas conduit of claim 1 , wherein the breathing gas conduit comprises at least one helically wound polymer strip, the at least one helically wound polymer strip comprising the membrane, wherein respective edges of adjacent turns of the at least one helically wound polymer strip are adjoining and bonded to form the enclosing wall.

8. The breathing gas conduit of claim 1 , wherein the breathing gas conduit comprises lateral reinforcement that improves crush resistance of the breathing gas conduit.

9. The breathing gas conduit of claim 8 , wherein the bead provides lateral reinforcement between each turn of at least one helically wound polymer strip.

10. The breathing gas conduit of claim 1 , wherein the bead pitch is between 3.5 to 5.5 millimeters.

11. The breathing gas conduit of claim 1 , further comprising at least one of:
(a) the bead comprising at least one of a width of between 1 and 3 millimeters,
(b) the bead comprising a height of between 0.5 and 2 millimeters,
(c) a length of the gases passageway between 310 millimeters to 410 millimeters, and
(d) the breathing gas conduit having an inner diameter between 10 to 15 millimeters.

12. The breathing gas conduit of claim 1 , wherein the enclosing wall is entirely formed by the membrane.

13. The breathing gas conduit of claim 1 , wherein the breathing gas conduit is resistant to extension forces up to approximately 30 Newton in a longitudinal direction without permanent deformation.

14. The breathing gas conduit of claim 1 , wherein the breathing gas conduit is resistant to an applied force up to approximately 15 Newton in a lateral direction without a breathing circuit component breaking.

15. A breathing circuit assembly including:
a patient interface; and
a breathing circuit component comprising:
an inlet,
an outlet,
an enclosing wall defining a gases passageway between the inlet and the outlet, at least a region of the enclosing wall comprising a membrane that allows passage of water vapour without substantially allowing a passage of liquid water or respiratory gases, the membrane comprising a membrane wall thickness, and
a bead helically wound around the enclosing wall, the bead comprising a bead pitch defined by a distance between adjacent winds of the bead, wherein the breathing circuit component comprises a ratio of bead pitch to membrane wall thickness between 1:0.0080 to 1:0.0128 so as to reduce noise produced by movement of the breathing circuit component when in use.

16. The breathing circuit assembly of claim 15 , wherein the patient interface is any one of:
a full face mask comprising a mask frame and a cushion configured to seal around a nose and a mouth of a patient;
an oral mask comprising a mask frame and a cushion configured to seal around the mouth of the patient;
a nasal mask comprising a mask frame and a cushion configured to seal around the nose of the patient;
a nasal cannula comprising one or more prongs for insertion into one or more naris of the patient;
a nasal mask comprising one or more nasal pillows configured to seal against the nose of the patient;
a hybrid mask comprising a combination of nasal pillows/prongs and an oral seal;
an endotracheal conduit; and
a tracheostomy interface.

17. The breathing circuit assembly of claim 15 , further comprising at least one of:
a lanyard configured to be attached at or adjacent a first end of the breathing circuit component;
a conduit connector configured to connect a first end of the breathing circuit component to an inspiratory gas conduit;
an inspiratory gas conduit configured to deliver inspiratory gases to the patient interface via the breathing circuit component;
a humidifier configured to humidify inspiratory gases prior to delivery of the inspiratory gases to the patient interface; and
a gases source couplable to the patient interface through the breathing circuit component.

18. A respiratory apparatus comprising:
a gas source;
an inspiratory gas conduit;
a breathing gas conduit comprising:
an inlet,
an outlet,
an enclosing wall defining a gases passageway between the inlet and the outlet, at least a region of the enclosing wall comprising a membrane that allows a passage of water vapour without substantially allowing passage of liquid water or respiratory gases, the membrane comprising a membrane wall thickness, and
a bead helically wound around the enclosing wall, the bead comprising a bead pitch defined by a distance between adjacent winds of the bead, wherein the breathing gas conduit has a ratio of bead pitch to membrane wall thickness between 1:0.0080 to 1:0.0128 so as to reduce noise production from movement of the breathing gas conduit;
a patient interface; and
a section of a gas conduit configured to be positioned between the inspiratory gas conduit and the patient interface.

19. The respiratory apparatus of claim 18 , wherein the patient interface is any one of:
a full face mask comprising a mask frame and a cushion that seals around a nose and a mouth of a patient;
an oral mask comprising a mask frame and a cushion to seal that seals around the mouth of the patient;
a nasal mask comprising a mask frame and a cushion that seals around the nose of the patient;
a nasal cannula comprising one or more prongs that insert into one or more naris of the patient;
a nasal mask comprising one or more nasal pillows that seal against the nose of the patient;
a hybrid mask comprising a combination of nasal pillows/prongs and an oral seal;
an endotracheal conduit; and
a tracheostomy interface.

20. The respiratory apparatus of claim 18 , further comprising at least one of:
(a) the bead comprising at least one of a width of between 1 and 3 millimeters,
(b) the bead comprising a height of between 0.5 and 2 millimeters,
(c) a length of the gases passageway between 310 millimeters to 410 millimeters, and
(d) the breathing gas conduit comprising an inner diameter betw

Assignees

• Fisher & Paykel Healthcare Ltd

Inventors

• Lopez Muedano Carlos Alberto
• Gray Nathan Lee

Classifications

• A61M25/0032

  characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts · CPC title

• A61M16/0816

  Joints or connectors · CPC title

• A61M16/0666

  Nasal cannulas or tubing (devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02) · CPC title

• A61M16/0465

  Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters · CPC title

• A61M16/0066

  Blowers or centrifugal pumps · CPC title