Irradiation catheter and method of use

A - Human Necessities – 61 – N

Patent

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Details

A61N 5/00 (2006.01) A61M 25/10 (2006.01) A61M 29/00 (2006.01) A61N 5/10 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2198020

This invention is a catheter (10) for use with a radioactive source (16) within the catheter (10) to irradiate a selected area of a blood vessel in combination with angioplasty procedures, to prevent restenosis of that area of the blood vessel. The catheter (10) has a guidewire channel (18) formed near its distal end to facilitate use of the catheter (10) as a rapid exchange catheter, allowing insertion of the catheter over a guidewire (20) also used in performance of an angioplasty procedure. The catheter (10) can also have a guidewire channel (19) formed near its proximal end to provide O-ring sealing surface and to facilitate free guidewire movement. The catheter (10) also has a closed end (13) to retain the radioactive source (16) within the catheter (10). The catheter (10) can be also be provided with a centering balloon (22) or a set of centering wire loops (50) to center the radioactive source (16) radially within the blood vessel.

Cette invention se rapporte à un cathéter (10) conçu pour être utilisé avec une source radioactive (16) placée dans le cathéter (10), afin d'irradier une zone sélectionnée d'un vaisseau sanguin en combinaison avec des interventions d'angioplastie, afin de prévenir toute resténose de cette zone du vaisseau sanguin. Ledit cathéter (10) comprend un canal pour fil-guide (18) formé à proximité de son extrémité distale, afin de faciliter l'utilisation du cathéter (10) comme cathéter d'échange rapide, permettant ainsi l'introduction du cathéter sur un fil-guide (20), également utilisé dans la réalisation d'une intervention d'angioplastie. Ledit cathéter (10) peut également comporter un canal de fil-guide (19) formé près de son extrémité proximale, afin de constituer une surface d'étanchéité à joint torique et afin de faciliter les mouvements libres du fil-guide. Ledit cathéter (10) comprend également une extrémité fermée (13) destinée à retenir la source radioactive (16) dans le cathéter (10). Ledit cathéter (10) peut également être pourvu d'un ballonnet de centrage (22) ou d'un ensemble de boucles de fil de centrage (50) servant à centrer la source radioactive (16) radialement à l'intérieur du vaisseau sanguin.

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