A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 7/00 (2006.01) A61B 17/22 (2006.01) A61N 7/02 (2006.01) A61B 17/00 (2006.01) A61B 18/24 (2006.01)
Patent
CA 2415671
Apparatus and methods for ablating tissue surrounding a tubular anatomical structure such as the wall of a blood vessel or prostatic tissue surrounding the urethra. The apparatus includes an ultrasonic emitter (720) such as a cylindrical emitter and an inflatable annular lens balloon (717) surrounding the ultrasonic emitter. The lens balloon is inflated with a liquid having acoustic velocity different than that of the surrounding medium, so as to form an annular refracting surface. The acoustic energy from the emitter is focused into an annular focal region (737).
L'invention concerne un appareil et des procédés destinés à l'ablation de tissu entourant une structure anatomique tubulaire telle que la paroi d'un vaisseau sanguin ou le tissu prostatique entourant l'urètre. L'appareil comprend un émetteur d'ultrasons (720), tel qu'un émetteur cylindrique, et un ballonnet en forme de lentille annulaire gonflable (717) entourant l'émetteur d'ultrasons. Le ballonnet lentille est gonflé au moyen d'un liquide possédant une vitesse acoustique différente de celle du milieu environnant de façon à former une surface de réfraction annulaire. L'énergie acoustique provenant de l'émetteur est focalisée sur une région focale annulaire (737).
Acker David E.
Fjield Todd
Harhen Edward Paul
Lopath Patrick David
Moffat & Co.
Recor Medical Inc.
Transurgical Inc.
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