Balloon catheter and method for manufacturing same

Details Balloon catheter and method for manufacturing same Balloon catheter and method for manufacturing same

A - Human Necessities

61

M

A61M 25/10 (2006.01)

Patent

CA 2346460

A balloon catheter 1 is configured so as to comprise a catheter shaft 2 formed by joining a proximal-side tubular member 3 and a distal-side tubular member 4, an adapter member 6 connected to the base end of the catheter shaft 2, and a balloon 5 joined to the distal end of the catheter shaft 2. A metal coiled elastic member 10 is deployed in the internal space in the adapter member 6, so that it can move toward the distal end. This coiled elastic body 10 abuts on a ring-shaped wall part 11a formed on the outer circumferential surface of the base end of an elastic force transmitting member 11 and supports the elastic force transmitting member 11 to the distal side. The leading end of a linear member 12 that is one of the components of the elastic force transmitting member 11 reaches to an internal space 5f in the balloon and is bonded to the outer circumferential surface of a guide wire passing tube 7. Thus the elastic supporting force of the coiled elastic body 10 is transmitted via the elastic force transmitting member 11 to the distal-side sleeve part 5d of the balloon 5, and tension is imparted to the balloon 5 in the axial direction.

L'invention concerne un cathéter à ballonnet (1). Ce cathéter comprend une tige de cathéter (2) formée par l'assemblage d'un élément tubulaire du côté proximal (3) et d'un élément tubulaire du côté distal (4), un élément d'adaptation (6) relié à l'extrémité de base de la tige de cathéter (2) et un ballonnet (5) relié à l'extrémité distale de la tige (2). Un corps élastique (10) en forme de spire métallique est placé dans l'espace intérieur de l'élément d'adaptation (6) de manière à pouvoir se déplacer dans le sens distal. Le corps élastique (10) entre en contact avec une partie de paroi annulaire (11a) formée sur la surface périphérique extérieure de l'extrémité de base d'un élément de transmission (11) de force élastique pour supporter ce dernier en direction du côté distal de ce dernier. En outre, l'extrémité de pointe d'un élément linéaire (12), un des éléments de cet élément de transmission (11), s'étend jusqu'à l'espace interne (5f) du ballonnet et est relié à la surface périphérique extérieure d'un tube (7) formant guide-fil. Cette disposition permet à la force de support élastique du corps élastique (10) d'être transmise à un manchon (5d) du côté distal du ballonnet (5) via l'élément de transmission (11) pour conférer un effort de traction axiale au ballonnet (5).

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