Patent ID: 7150723

Claim:
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.