Catheter

• US 9,999,749 B2
• Filed: 11/22/2016
• Issued: 06/19/2018
• Est. Priority Date: 01/30/2013
• Status: Active Grant

• Current Assignee: Asahi Intecc Company Limited
• Original Assignee: Asahi Intecc Company Limited
• Inventors: Hiroshige, Tadanori, Nishigishi, Makoto, Kaneda, Kenji, Kajii, Tatsuhiko
• Primary Examiner(s): Price, Nathan R
• Assistant Examiner(s): BUI, ANH T
• Application Number:
  US15/358,262
• Publication Number:
  US 20170072166A1
• Time in Patent Office: 574 Days
• 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:

a catheter shaft including;

an inner layer;

a braid disposed on an outer periphery of the inner layer, the braid including (i) a plurality of first wires and a plurality of second wires that are woven together, and (ii) a plurality of first bulging portions disposed on corresponding distal ends of the plurality of first wires; and

an outer layer disposed on an outer periphery of the braid; and

a tip disposed on a distal end of the catheter shaft, the tip covering the plurality of first bulging portions,

wherein each of the plurality of first bulging portions is disposed at a position distally shifted from an intersection that each of the plurality of first wires and each of the plurality of second wire are intersected.

2. The catheter according to claim 1, further comprising:

a plurality of second bulging portions disposed on corresponding distal ends of the plurality of second wires,

wherein each of the plurality of second bulging portions is larger than each of the plurality of first bulging portions.

3. The catheter according to claim 2, wherein each of the plurality of second bulging portions is disposed at the intersection.

4. The catheter according to claim 2, wherein each of the plurality of second bulging portions is disposed at a position proximally shifted from each of the plurality of first bulging portions.

5. The catheter according to claim 1, wherein a radial thickness of each of the plurality of first bulging portions is larger than a radial thickness of each of the plurality of first wires.

6. The catheter according to claim 2, wherein a radial thickness of each of the plurality of second bulging portions is larger than a radial thickness of each of the plurality of second wires.

7. A catheter comprising:

a catheter shaft including;

an inner layer;

a braid disposed on an outer periphery of the inner layer, the braid including (i) a first wire and a second wire that are woven together, and (ii) a first bulging portion disposed on a distal end of the first wire; and

an outer layer disposed on an outer periphery of the braid; and

a tip disposed on a distal end of the catheter shaft, the tip covering the first bulging portion,

wherein the first bulging portion is disposed at a position distally shifted from an intersection that the first wire and the second wire are intersected.

8. The catheter according to claim 7, further comprising:

a second bulging portion disposed on a distal end of second wire,

wherein the second bulging portion is larger than the first bulging portion.

9. The catheter according to claim 8, wherein the second bulging portion is disposed at the intersection.

10. The catheter according to claim 8, wherein the second bulging portion is disposed at a position proximally shifted from the first bulging portion.

11. The catheter according to claim 7, wherein a radial thickness of the first bulging portion is larger than a radial thickness of the first wire.

12. The catheter according to claim 8, wherein a radial thickness of the second bulging portion is larger than a radial thickness of the second wire.