Catheter

Patent metadata

Field	Value
Publication number	US-9545496-B2
Application number	US-201314100943-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Jan 30, 2013
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

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.

First claim

What is claimed is:

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.

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.

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

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

Assignees

• Asahi Intecc Co Ltd

Inventors

• Hiroshige Tadanori
• Nishigishi Makoto
• Kaneda Kenji
• Kajii Tatsuhiko

Classifications

• A61M25/0068 Primary

  Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure · CPC title

• A61M25/0045

  multi-layered, e.g. coated (coating materials A61L29/08) · CPC title

• A61M25/005 Primary

  with embedded materials for reinforcement, e.g. wires, coils, braids · CPC title

• A61M25/0012

  with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils · CPC title

• A61M25/0053

  having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid · CPC title