Catheter

• US 9,545,496 B2
• Filed: 12/09/2013
• Issued: 01/17/2017
• Est. Priority Date: 01/30/2013
• Status: Active Grant

• Current Assignee: Asahi Intecc Company Limited
• Original Assignee: Asahi Intecc Company Limited
• Inventors: Hiroshige, Tadanori, Kaneda, Kenji, Nishigishi, Makoto, Kajii, Tatsuhiko
• Primary Examiner(s): Bouchelle, Laura
• Assistant Examiner(s): BUI, ANH T
• Application Number:
  US14/100,943
• Publication Number:
  US 20140214006A1
• Time in Patent Office: 1,135 Days
• US Class Current: 1/1
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0051 made from fenestrated or weakened tubing layer
• CPC Class Codes: A61M 25/0052 Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure

Abstract

A catheter includes an inner layer, and a braid provided on an outer periphery of the inner layer. The braid includes a first wire and a second wire that are woven together. The catheter further includes a tip provided on a distal end of the inner layer and a distal end of the braid. A residual portion having a sharp shape formed at a distal end of the first wire when the first wire is cut is not left untreated, but is formed into a bulging portion.

Claims

1. A catheter comprising:

an inner layer;

a braid disposed on an outer periphery of the inner layer, the braid including;

a first wire and a second wire that are woven together, and

a bulging portion disposed on only one of a distal end of the first wire and a distal end of the second wire; and

a tip disposed on a distal end of the inner layer and a distal end of the braid, the tip covering the bulging portion.

2. The catheter according to claim 1, wherein the bulging portion is disposed at the distal end of the first wire, the bulging portion being made of a same material as a material of the first wire.

3. The catheter according to claim 1, wherein the bulging portion has a rounded shape.

4. The catheter according to claim 1, further including a second bulging portion that is disposed at an intersection of the first wire and the second wire.

5. The catheter according to claim 2, wherein the bulging portion has a rounded shape.

6. The catheter according to claim 2, further including a second bulging portion that is disposed at an intersection of the first wire and the second wire.

7. The catheter according to claim 3, further including a second bulging portion that is disposed at an intersection of the first wire and the second wire.

8. The catheter according to claim 4, wherein the second bulging portion is disposed proximally of the bulging portion.

9. The catheter according to claim 4, wherein the second bulging portion is formed by wrapping the distal end of the first wire around the second wire.

10. The catheter according to claim 1, wherein a radial thickness of the bulging portion is larger than a radial thickness of the one of a distal end of the first wire and a distal end of the second wire.

11. A catheter comprising:

an inner layer;

a braid disposed on an outer periphery of the inner layer, the braid including;

a first wire and a second wire that are woven together, and

a first bulging portion disposed only at a distal end of the second wire, and

a second bulging portion disposed only at a distal end of the first wire, the second bulging portion being disposed at an intersection of the first wire and the second wire; and

a tip disposed on a distal end of the inner layer and a distal end of the braid, the tip covering the first bulging portion,

wherein the second bulging portion is formed by wrapping the distal end of the first wire around the second wire.

12. The catheter according to claim 11, wherein the first bulging portion has an annular shape.

13. The catheter according to claim 11, wherein the braid includes a plurality of the first wires and a plurality of the second wires, and

the first bulging portion extends through at least one of the distal ends of the plurality of the second wires.

14. The catheter according to claim 11, wherein the first bulging portion has a radial thickness that is larger than a radial thickness of the distal end of the second wire.

16. The catheter according to claim 11, wherein the first bulging portion is disposed at a position shifted from the intersection.

15. A catheter comprising:

an inner layer;

a braid disposed on an outer periphery of the inner layer, the braid including;

a first wire and a second wire that are woven together,

a first bulging portion disposed only at a distal end of the second wire,

a second bulging portion disposed only at a distal end of the first wire, the second bulging portion being disposed at an intersection of the first wire and the second wire; and

a tip disposed on a distal end of the inner layer and a distal end of the braid, the tip covering the first bulging portion.

17. The catheter according to claim 15, wherein the first bulging portion is disposed at a position shifted from the intersection.