Ultrasonic catheter drug delivery method and device

A - Human Necessities – 61 – B

Patent

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A61B 17/22 (2006.01) A61M 37/00 (2006.01)

Patent

CA 2448808

An ultrasonic catheter drug delivery device comprises an ultrasound transducer to produce ultrasonic waves, which transducer is mechanically attached to a catheter body or chamber. The ultrasonic transducer has a distal tip with a distal radiation surface, and when a therapeutic agent from a fluid source is directed to the catheter body or chamber, the radiation surface creates ultrasonic pressure and delivers liquid and simultaneously ultrasonic energy to a patient's vascularity or a selected body lumen. The method applies therapeutic agent and ultrasonic waves to the vascular area, lung or any body lumen without requiring direct contact between ultrasound transducer and body, dissolves blood clots, and stimulates tissue cells.

L'invention concerne un dispositif d'administration de médicament à cathéter ultrasonore comprenant un transducteur ultrasonore destiné à produire des ondes ultrasonores, ce transducteur étant fixé par voie mécanique dans une chambre ou un corps de cathéter. Ledit transducteur ultrasonore comporte une pointe distale munie d'une surface de rayonnement distale. Lorsqu'un agent thérapeutique en provenance d'une source de fluide est dirigé vers la chambre ou le corps du cathéter, la surface de rayonnement crée une pression ultrasonore et distribue le liquide conjointement avec de l'énergie ultrasonore dans le système vasculaire d'un patient ou dans une lumière corporelle sélectionnée. Cette méthode permet d'appliquer un agent thérapeutique et des ondes ultrasonores dans une zone vasculaire, un poumon ou n'importe quelle lumière corporelle sans contact direct entre le transducteur ultrasonore et le corps, de dissoudre les caillots de sang et de stimuler les cellules tissulaires.

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