Medical device including guide wire and balloon catheter for curing a coronary artery

• US 7,150,723 B2
• Filed: 06/07/2005
• Issued: 12/19/2006
• Est. Priority Date: 11/29/2001
• Status: Expired due to Fees

• Current Assignee: Asahi Intecc Company Limited, C-I-Medic Company Limited
• Original Assignee: Asahi Intecc Company Limited, C-I-Medic Company Limited
• Inventors: Momota, Masashi, Meguro, Taiichiroh, Kato, Tomihisa
• Primary Examiner(s): Hindenburg, Max F.
• Assistant Examiner(s): FOREMAN, JONATHAN M
• Application Number:
  US11/146,143
• Publication Number:
  US 20050228431A1
• Time in Patent Office: 560 Days
• Field of Search: 600/433, 600/434, 600/435, 600/585, 604/95.01, 604/96.01, 604/103.03, 604/103.09, 604/164.01, 604/164.03, 604/164.13, 604/165.01, 604/165.02, 604/170.01, 604/170.02, 604/523, 604/524, 604/526, 604/528
• US Class Current: 604/96.01
• CPC Class Codes: A61M 2029/025 characterised by the guiding element
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/09033 with fixed mandrils, e.g. mandrils fixed to tip; Tensionable wires
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

In a medical guide wire 1, a rear half of a leading bulge portion (ellipsoidal helical spring) 5 forms a truncated cone shaped front catheter engagement portion 8. An inner wall of a balloon catheter 2 forms a flared end portion 2A which absorbably fits into the front catheter engagement portion 8 due to the physical adhesion so to provisionally connect the balloon catheter 2 to the front catheter engagement portion 8. The medical guide wire 1 and the balloon catheter 2 are inserted into the blood vessel with one single step procedure when the medical guide wire 1 is introduced into the blood vessel to place the balloon portion 10 at the stricture blood vessel area (P).

Claims

1. A medical device including a guide wire and a tubular balloon catheter in which the guide wire and the catheter are engaged and inserted into a coronary artery comprising:

a front end having a front catheter engagement portion that is provisionally connected to a front end of the balloon catheter as a provisionally connecting means, the front catheter engagement portion is formed from a mirror-finished barrel portion to have an entirely mirrored surface, and the provisionally connected balloon catheter is inserted into a coronary artery concurrently with the guide wire,

wherein the mirror-finished barrel portion is formed by providing a soldering portion integrally fixed in one piece on a helical spring portion of the guide wire and a core inserted into the guide wire;

a front end of the balloon catheter is diametrically smaller than a maximum diameter of the mirror-finished barrel portion, and elastically deforms to be diametrically greater than a tube portion of the balloon catheter so as to form a flared end portion when the mirror-finished barrel portion absorbably engages with the front end of the balloon catheter due to a physical adhesion at the time of provisionally connecting the balloon catheter; and

wherein both lengthwise sides of the mirror-finished barrel portion form parallel flat sections.

2. The medical device according to claim 1, wherein the parallel flat sections are cut at its outer surface.