Ultrasound catheter with cavitation promoting surface

A - Human Necessities – 61 – B

Patent

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Details

A61B 8/14 (2006.01) A61B 17/20 (2006.01)

Patent

CA 2604380

In one embodiment of the present invention, a method of applying ultrasonic energy to a treatment site within a patient's vasculature comprises positioning an ultrasound radiating member at a treatment site within a patient's vasculature. The method further comprises activating the ultrasound radiating member to produce pulses of ultrasonic energy at a cycle period T <= 1 second. Each pulse of ultrasonic energy has a first peak amplitude for a first duration, and a second reduced amplitude that is less than the first peak amplitude for a second duration.

Selon un mode de réalisation de la présente invention, un procédé pour appliquer une énergie ultrasonore sur un site de traitement dans le système vasculaire d'un patient consiste à positionner un élément émettant un rayonnement ultrasonore sur un site de traitement dans le système vasculaire d'un patient. Ce procédé consiste ensuite à activer cet élément émettant un rayonnement ultrasonore afin qu'il produise des impulsions d'énergie ultrasonore sur une durée de cycle T = à 1 seconde. Chaque impulsion d'énergie ultrasonore présente une première amplitude de crête pendant une première durée et une seconde amplitude réduite, inférieure à la première amplitude de crête, pendant une seconde durée.

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