IP Library › Granted Patent US 12,280,215
Granted Patent B2
US 12,280,215 · App. 17/451,099 · Granted Apr 22, 2025

Medical tubes and methods of manufacture

Inventors: Elmo Benson Stoks (Auckland, NZ); Charles Christopher North (Auckland, NZ)
Assignee: Fisher & Paykel Healthcare Limited
A61M16/1095A61M13/00A61M16/0875A61M16/0883A61M25/005A61M39/00B29C53/60B29C53/785A61M5/44A61M16/0833A61M16/16A61M2205/3368A61M2205/75A61M2207/00Y10T29/49826
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Quick Facts
Patent No.
US 12,280,215
App. No.
17/451,099
Granted
Apr 22, 2025
Kind
B2
Abstract

The disclosure relates to medical tubes and methods of manufacturing medical tubes. The tube may be a composite structure made of two or more distinct components that are spirally wound to form an elongate tube. For example, one of the components may be a spirally wound elongate hollow body, and the other component may be an elongate structural component also spirally wound between turns of the spirally wound hollow body. The tube need not be made from distinct components, however. For instance, an elongate hollow body formed (e.g., extruded) from a single material may be spirally wound to form an elongate tube. The elongate hollow body itself may in transverse cross-section have a thin wall portion and a relatively thicker or more rigid reinforcement portion. The tubes can be incorporated into a variety of medical circuits or may be employed for other medical uses.

Claims (21)

1. A composite tube for use in medical circuits that provide gases to and/or from a patient, the composite tube comprising:

a first elongate member and a second elongate member that provide for a lumen with a smooth lumen surface, the smooth lumen surface extending along a longitudinal axis of the composite tube;

the first elongate member comprising a hollow body, the first elongate member being spirally wound to form at least a portion of a wall that defines the smooth lumen surface through the composite tube and the hollow body at least partially surrounding the smooth lumen surface; and

the second elongate member being spirally wound and joined between adjacent turns of the first elongate member, the second elongate member forming at least a portion of the wall that defines the smooth lumen surface through the composite tube, the second elongate member having a longitudinal cross-section that is wider proximal the smooth lumen surface through the composite tube and narrower at a radial distance away from the smooth lumen surface through the composite tube, and the longitudinal cross-section being generally triangular, generally T-shaped, or generally Y-shaped.

2. The composite tube of claim 1 , wherein the second elongate member is less flexible than the first elongate member.

3. The composite tube of claim 1 , wherein the spirally wound and joined first and second elongate members provide crush resistance while being flexible enough to permit short-radius bends without kinking, occluding, or collapsing.

4. The composite tube of claim 1 , wherein portions of the first elongate member overlap adjacent turns of the second elongate member.

5. The composite tube of claim 4 , wherein bond regions are defined by the portions of the first elongate member that overlap adjacent turns of the second elongate member.

6. The composite tube of claim 1 , wherein the second elongate member is solid or substantially solid.

7. The composite tube of claim 1 , wherein the first elongate member forms in longitudinal cross-section a plurality of bubbles with a flattened surface at the smooth lumen surface.

8. The composite tube of claim 7 , wherein adjacent bubbles are separated by a gap above the second elongate member.

9. The composite tube of claim 8 , wherein the gap permits short-radius bends.

10. The composite tube of claim 9 , wherein the longitudinal cross-section of the second elongate member is generally triangular.

11. The composite tube of claim 7 , wherein each of the plurality of bubbles have perforations.

12. The composite tube of claim 1 , further comprising one or more conductive filaments embedded or encapsulated in the second elongate member.

13. The composite tube of claim 12 , wherein the one or more conductive filaments are embedded or encapsulated in the second elongate member on opposite sides of a plane that generally bisects the longitudinal cross-section.

14. The composite tube of claim 12 , wherein the one or more conductive filaments comprise at least one heating filament.

15. The composite tube of claim 12 , wherein the one or more conductive filaments comprise at least one sensing filament.

16. The composite tube of claim 12 , further comprising four conductive filaments embedded or encapsulated in the second elongate member.

17. The composite tube of claim 12 , wherein pairs of the one or more conductive filaments are formed into a connecting loop at one end of the composite tube.

18. The composite tube of claim 1 , wherein the composite tube is a medical circuit component, an inspiratory tube, an expiratory tube, a PAP component, an insufflation component, an exploratory component, or a surgical component.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 7, 2022
From: STOKS, ELMO BENSON; NORTH, CHARLES CHRISTOPHER
To: FISHER & PAYKEL HEALTHCARE LIMITED
Reel/Frame 058911/0001 →
Continuity (5)
Continuation 16125594 · Sep 7, 2018
Continuation 14123485
Provisional Application 61610109 · Mar 13, 2012
Provisional Application 61492970 · Jun 3, 2011
Related Publication 20220211966A1 · Jul 7, 2022
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