Vascular occlusion removal devices and methods

Details Vascular occlusion removal devices and methods Vascular occlusion removal devices and methods

A - Human Necessities

61

B

A61B 17/22 (2006.01) A61M 1/00 (2006.01)

Patent

CA 2110982

A catheter (10) for removing vascular obstruction(s) is disclosed. The catheter employs a configuration comprising generally coaxial, rapidly rotatable drive cable (14), fluid output lumens or channels (48), and fluid input lumens or channels (30). The drive cable is fixedly coupled to an elongate head (16) so as to permit the head to be rapidly rotated by the drive cable. The head includes flats or impellers (26) which, when rapidly rotated, generate a zone of turbulence or a vortex adjacent the vascular obstruction. The turbulence generated by the device tends to break up or dismantle the obstruction. The fluid input and output mechanisms permit fluid to be delivered to the vicinity of the obstruction and debris from the obstruction to be removed. Methods for removing vascular obstructions are disclosed. Preferably pulsatile turbulence generation is employed.

Cathéter (10) pour éliminer les obstructions vasculaires. Le cathéter utilise une configuration comprenant un câble de commande généralement coaxial à rotation rapide (14), des lumières ou des canaux permettant l'aspiration de liquides (48) et des lumières ou des canaux permettant l'injection de liquides (30). Le câble de commande est fixé à une tête allongée (16) de manière à permettre à la tête de tourner rapidement lorsqu'elle est entraînée par le câble de commande. La tête comprend des méplats et des impulseurs (26) qui, lorsqu'ils tournent rapidement, génèrent une zone de turbulence ou un tourbillon adjacent à l'obstruction vasculaire. La turbulence engendrée par l'appareil a tendance à détruire ou à anéantir l'obstruction. Les mécanismes d'injection et d'aspiration de liquide permettent d'apporter un liquide dans la région de l'obstruction et de retirer les débris de l'obstruction. Des méthodes d'élimination des obstructions vasculaires sont dévoiléss. On emploie de préférence des techniques de génération pulsatile de turbulence.

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