Balloon catheter and method of manufacturing the same

• US 20060276820A1
• Filed: 05/13/2004
• Published: 12/07/2006
• Est. Priority Date: 05/19/2003
• Status: Abandoned Application

• Current Assignee: Kaneka Corporation
• Original Assignee: Kaneka Corporation
• Inventors: Yamaguchi, Youichi, Korogi, Mitsuharu
• Application Number:
  US10/552,289
• Publication Number:
  US 20060276820A1
• Time in Patent Office: Days
• US Class Current: 606/194
• CPC Class Codes: A61M 2025/1031 Surface processing of balloon members, e.g. coating or deposition; Mounting additional parts onto the balloon member's surface
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1029 Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
• CPC Class Codes: A61M 25/1038 Wrapping or folding devices for use with balloon catheters

Abstract

A medical balloon catheter according to the present invention includes a balloon having a groove and/or a projection helically provided relative to the longitudinal axis of the balloon. By such a structure, even after inflating the balloon once, for example, when the balloon is pushed into or removed through a severely stenosed lesion having a diameter smaller than that of the deflated balloon, the balloon can be easily wound more tightly. Therefore, pushing resistance can be reduced.

Claims

1. A medical balloon catheter comprising a balloon having a groove and/or a projection helically provided on the balloon relative to the longitudinal axis of the balloon.

2. The medical balloon catheter according to claim 1, wherein the groove and/or the projection are helically provided on at least one balloon taper relative to the longitudinal axis of the balloon.

3. The medical balloon catheter according to claim 2, wherein the groove and/or the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon are continuously provided at an angle ranging from 15°

to 180°

when viewed from the distal end, the angle being defined by a center-line connecting the center and a starting point and another-line connecting the center and an ending point.

4. The medical balloon catheter according to claim 2 or 3, wherein the groove and/or the projection are helically provided on a distal balloon taper relative to the longitudinal axis of the balloon, said the groove and/or the projection being extending from the distal end to the proximal side.

5. The medical balloon catheter according to claim 1, wherein a plurality of grooves and/or projections are helically provided on a balloon taper relative to the longitudinal axis of the balloon.

6. The medical balloon catheter according to claim 1, wherein the number of the grooves and/or projections helically provided on a balloon taper relative to the longitudinal axis of the balloon is 2 to 5.

7. The medical balloon catheter according to claim 1, wherein the width of the groove and/or the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon varies in the direction of the longitudinal axis of the balloon.

8. The medical balloon catheter according to claim 1, wherein the width of the groove and/or the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon is 1 μ

m or more.

9. The medical balloon catheter according to claim 1, wherein the width of the groove and/or the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon is 10 μ

m to 1,000 μ

m.

10. The medical balloon catheter according to claim 1, wherein the depth of the groove and/or the height of the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon is 0.01 m or more.

11. The medical balloon catheter according to claim 1, wherein the depth of the groove and/or the height of the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon is 0.1 mm or more to 3.0 mm or less.

12. The medical balloon catheter according to claim 1, wherein the length of the groove and/or the projection helically provided on a balloon taper relative to the longitudinal axis of the balloon is 0.1 mm or more to 4.0 mm or less.

13. A method for producing a balloon catheter including a balloon having a groove and/or a projection helically provided on a balloon taper relative to the longitudinal axis of the balloon, the method comprising forming the balloon with a mold.

16. The method for producing the balloon catheter according to any one of claims 13 to 15, wherein the groove and/or the projection to be helically provided on a balloon taper relative to the longitudinal axis of the balloon are formed on at least one balloon taper.

17. The method for producing the balloon catheter according to any one of claims 13 to 15, wherein the groove and/or the projection to be helically provided on a balloon taper relative to the longitudinal axis of the balloon are formed on a distal balloon taper, the groove and/or the projection extending from the distal end to the proximal side.

14. A method for producing a balloon catheter including a balloon having a groove and/or a projection helically provided on a balloon taper relative to the longitudinal axis of the balloon, the method comprising applying thermal energy to a preliminary formed balloon to form a groove and/or a projection helically provided on the balloon relative to the longitudinal axis of the balloon.

15. A method for producing a balloon catheter including a balloon having a groove and/or a projection helically provided on a balloon taper relative to the longitudinal axis of the balloon, the method comprising irradiating a preliminally formed balloon with a laser to form a groove and/or a projection on a balloon taper helically provided relative to the longitudinal axis of the balloon.