Stent delivery system and method of use

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/10 (2006.01) A61F 2/84 (2006.01) A61M 25/06 (2006.01)

Patent

CA 2398801

A balloon dilation catheter comprising a tubular member having a proximal end and a distal end. An inflatable balloon is disposed at the distal end of the tubular member. A first lumen is disposed in the tubular member and is in communication with an interior of the inflatable balloon. A second lumen is disposed in the tubular member for receiving a guidewire substantially along a portion of its length. The second lumen has a first opening in the proximal region of the tubular member and a second opening at the distal region of the tubular member. A first slit is disposed longitudinally in the tubular member and extends along at least a portion of the tubular member, the first slit comprising a first pair of longitudinal edges in a side by side relationship. The tubular member is constructed of a resilient material such that, as the guidewire is separated from the second lumen, the longitudinal edges are biassed open from a first position to a second position having a gap greater than or equal a diameter of the guidewire. The subject balloon dilation catheter provides improved rapid exchange advantages of either the catheter or the guidewire used in a catheterization technique.

La présente invention concerne un cathéter à ballonnet de dilatation contenant un élément tubulaire pourvu d'une extrémité proximale et d'une extrémité distale. Un ballonnet gonflable est disposé à l'extrémité distale de l'élément tubulaire. Une première lumière disposée dans l'élément tubulaire est en communication avec l'intérieur du ballonnet gonflable. Une seconde lumière est disposée dans l'élément tubulaire pour recevoir un fil-guide sensiblement le long d'une partie de sa longueur. La seconde lumière présente une première ouverture au niveau de la zone proximale de l'élément tubulaire, et une seconde ouverture au niveau de la zone distale de l'élément tubulaire. Une première fente pratiquée longitudinalement dans l'élément tubulaire s'étend le long d'au moins une partie de l'élément tubulaire, la première fente présentant une première paire de bord longitudinaux situés côte à côte. L'élément tubulaire est en matériau élastique, de sorte que, lorsque le fil-guide est séparé de la seconde lumière, les bords longitudinaux s'ouvrent en passant d'au moins une première position à une seconde position, formant ainsi une ouverture plus importante ou égale au diamètre du fil-guide. Ce cathéter à ballonnet de dilatation permet de changer rapidement le cathéter ou le fil-guide utilisé dans une technique de cathétérisme.

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