Fluoroscopically viewable guidewire

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/00 (2006.01) A61M 25/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2191966

A guidewire (10) adapted to be inserted into a vascular vessel or into a catheter that is to be inserted into a vascular vessel or the like. The guidewire comprises a coil of flexible radiotransparent wire having a proximal section (11) and a distal section (12). The proximal section (11) is formed of a coil of wire having abutting turns and distal section is formed by the same coil of wire with the turns of wire being spaced from each other. A layer of radiopaque material of predetermined length is disposed in a predetermined location on the distal section, the interior of the layer being interstitially disposed within the outer surface of the coil. A hemispherical tip (15) is disposed at the distal end of the distal section (12). A small braze (14) is made at the juncture between the proximal section and the distal section to prevent spreading of the coils from the abutting relationship in the proximal end of said guidewire.

Un fil de guidage (10) adapté pour être inséré dans un vaisseau vasculaire ou dans un cathéter devant être introduit dans un vaisseau vasculaire ou similaire. Le fil de guidage comprend une spirale de fil radiotransparent flexible comportant une section proximale (11) et une section distale (12). La section proximale (11) est formée d'une spirale de fil métallique ayant des spires en butée et une section distale est formée par la même spirale de fil métallique, les spires étant espacées les unes des autres. Une couche de matériau opaque aux rayonnements, de longueur prédéterminée, est placée dans un emplacement prédéterminé sur la section distale, l'intérieur de la couche étant placée de manière interstitielle à l'intérieur de la surface extérieure de la spirale. Une pointe hémisphérique (15) est placée au niveau de l'extrémité distale de la section distale (12). Une petite brasure (14) est effectuée à la jonction entre la section proximale et la section distale pour éviter la dispersion des spires depuis leur position de butée dans l'extrémité proximale du fil de guidage.

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