Catheter with stand-off structure

A - Human Necessities – 61 – M

Patent

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Details

A61M 29/00 (2006.01) A61M 29/02 (2006.01) A61N 5/10 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2304160

A catheter (10), and a method for performing radiation treatment at a site where angio-plasty was performed, are disclosed. The catheter (10) includes a hollow, cylindrical member (12) constructed from a fairly flexible material. The catheter is maneuvered within the body by traveling over a guide wire which was initially maneuvered in the blood vessel to a position beyond the actual site of a stenosis. Stand-off structure (26) having a stand-off balloon (28) surrounds a portion (30) of the outer surface of the catheter (10). The distal end (18) of the catheter (10) includes an inner lumen plug (38), and a distal mandrel (40) extending through the inner lumen plug (38). The distal mandrel (40) is manufactured from shape memory alloy to stiffen, and reinforce the catheter when the catheter is introduced within the blood vessel.

L'invention concerne un cathéter (10) et un procédé de traitement par rayonnement sur un site où une angioplastie a été préalablement réalisée. Ledit cathéter (10) présente un élément creux et cylindrique (12) fabriqué dans un matériau sensiblement souple. On manoeuvre ledit cathéter à l'intérieur du corps, en le déplaçant sur un fil-guide ayant été déplacé initialement dans le vaisseau sanguin jusqu'à un point situé au-delà du site de la sténose. Une structure d'espacement de sécurité (26) dotée d'un ballonnet (28) d'espacement de sécurité, entoure une partie (30) de la surface extérieure du cathéter (10). L'extrémité distale (18) du cathéter comprend un obturateur (38) interne de lumière, et un mandrin distal (40) s'étendant dans ledit bouchon (38). Le mandrin distal (40) est fabriqué dans un alliage à mémoire de forme et est utilisé pour raidir et renforcer le cathéter lorsqu'il est introduit dans le vaisseau sanguin.

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