Medical catheter with stress riser at access port to reduce...

Details Medical catheter with stress riser at access port to reduce... Medical catheter with stress riser at access port to reduce...

A - Human Necessities

61

M

A61M 25/01 (2006.01)

Patent

CA 2662934

A method and apparatus for uncoupling a wire guide (11) from and elongate medical device comprising a catheter shaft (10) having a wire guide lumen extending there through, wherein the material surrounding the wire guide lumen is selected or adapted to facilitate splittability for removal of the wire guide. The catheter shaft includes a wire guide port (20) having a stress riser, the stress riser being configured to reduce the force necessary to rupture or split the portion of the shaft wall adjacent to the wire guide port. In a preferred embodiment, the catheter shaft is coextruded and comprises a plurality of materials. The portion of the shaft adjacent the wire guide lumen is formed from a material is selected or adapted to facilitate splittability as compared to the remaining shaft materials.

L'invention concerne un procédé et un appareil destinés à la séparation d'un guide-fil d'un dispositif médical allongé comprenant une tige de cathéter comportant une lumière de guide-fil qui la traverse, le matériau entourant la lumière du guide-fil étant sélectionné ou conçu pour faciliter la séparation du guide-fil. La tige de cathéter comprend un port de guide-fil pourvu d'un mécanisme de tension, ce mécanisme de tension étant conçu pour réduire la force nécessaire pour rompre ou séparer la partie de la paroi de la tige adjacente au port du guide-fil. Dans un mode de réalisation préféré, la tige de cathéter est coextrudée et se compose d'une pluralité de matériaux. La partie de la tige adjacente à la lumière du guide-fil est formée à partir d'un matériau sélectionné ou conçu pour faciliter la séparation, par rapport aux autres matériaux utilisés dans la tige.

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