Interface needle and method for creating a blunt interface...

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/16 (2006.01) A61M 25/00 (2006.01) A61M 5/14 (2006.01) A61M 5/32 (2006.01)

Patent

CA 2361129

An interface needle (12) is used for connecting a syringe (14) to a catheter (10) to create a blunt interface between two or more liquids being delivered through the catheter (10). The interface needle (12) is particularly useful for creating a blunt interface between a bio-compatible solvent and a liquid embolic composition which is delivered to the body for treatment of various conditions including aneurysms. A system for liquid delivery with a blunt liquid interface includes a catheter (10) or other cannula, an interface needle (12), and a syringe (14). The interface needle (12) includes a tube (36) extending from a distal end which delivers liquid to a lumen of the catheter (10) bypassing a reservoir (36) in the catheter hub (28) to create the blunt liquid interface. One embodiment of the interface needle (12) controls an injection pressure of high viscosity liquids.

L'invention porte sur une aiguille interfacielle (12) qui s'utilise pour fixer une seringue (14) à un cathéter (10) en vue de créer une interface arrondie entre deux ou plusieurs liquides distribués par le cathéter (10). L'aiguille interfacielle (12) est particulièrement utile pour créer une interface arrondie entre un solvant biocompatible et une composition d'embolisation administrée à un corps pour traiter diverses affections, dont des anévrismes. Un système de distribution de liquide muni d'une interface de liquide arrondie inclut un cathéter (10) ou autre canule, une aiguille interfacielle (12) et une seringue (14). L'aiguille interfacielle (12) comprend un tube (36) prolongeant une extrémité distale, laquelle distribue le liquide vers une lumière du cathéter (10) contournant un réservoir (36) disposé dans le noyau du cathéter (28) pour créer l'interface de liquide arrondie. Dans une forme de réalisation, l'aiguille interfacielle (12) régule une pression d'injection de liquides de grande viscosité.

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