Micro catheter and guidewire system having improved...

A - Human Necessities – 61 – B

Patent

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Details

A61B 1/267 (2006.01) A61B 5/00 (2006.01) A61B 6/00 (2006.01) A61M 5/00 (2006.01) A61M 25/00 (2006.01) A61M 25/16 (2006.01) A61M 25/18 (2006.01) A61M 29/00 (2006.01) A61M 31/00 (2006.01) A61M 37/00 (2006.01) A61M 39/00 (2006.01) A61M 39/10 (2006.01) B65D 81/00 (2006.01)

Patent

CA 2423604

A microcatheter and guidewire system for use in tortuous regions of a vasculature includes a catheter body (14) having a distal end, a guidewire lumen (54), a proximal region (16) with an outer diameter. The ratio of the proximal region (16) outer diameter to the distal region (22) outer diameter is at least 1.625:1 to improve pushability of the catheter body (14). The guidewire lumen (54) defines a stopper (50) and the guidewire (12) has a depth stop (42) for engaging the stopper (50) of the guidewire lumen (54). The depth stop (42) and the stopper (50) cooperate to enable the guidewire (12) to cooperate with the catheter (14) to improve catheter (14) pushability. The depth stop (42) and the stopper (50) also prevent over extension of the guidewire (12).

L'invention concerne un microcathéter et un système de fil-guide, servant dans les zones tortueuses du système vasculaire et comprenant un corps de cathéter creux (14) pourvu d'une extrémité distale, d'une lumière de fil-guide (54), d'une zone proximale (16) à diamètre externe et d'une zone distale (22) à diamètre externe. Le rapport entre le diamètre externe de la zone proximale (16) et celui de la zone distale (22) est au moins de 1.625:1 pour améliorer la maniabilité du corps de cathéter (14). La lumière de fil-guide (54) définit un obturateur (50) et le fil-guide (12) a une butée de profondeur (42) pour se mettre en prise avec l'obturateur (50) de la lumière de fil-guide (54). La butée de profondeur (42) et l'obturateur (50) coopèrent pour permettre au fil-guide (12) de coopérer avec le cathéter (14), afin d'améliorer la maniabilité de ce dernier. La butée de profondeur (42) et l'obturateur (50) empêchent également une trop grande extension du fil-guide (12).

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