A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 8/12 (2006.01) A61B 17/22 (2006.01) A61N 7/02 (2006.01) A61B 17/00 (2006.01) A61B 18/24 (2006.01)
Patent
CA 2415134
A collapsible ultrasonic reflector incorporates a gasfilled reflector balloon (50), a liquid-filled structural balloon (28) and an ultrasonic transducer (20) disposed within the structural balloon. Acoustic energy emitted by the transducer is reflected by a highly reflective interface between the balloons. In a cardiac ablation procedure, the ultrasonic energy is focused into an annular focal regions (44) to ablate cardiac tissue extending in an annular path along the wall. Devices for stabilizing the balloon structure and for facilitating collapse and withdrawal of the balloon structure are also disclosed.
L'invention concerne un réflecteur d'ultrasons repliable comprenant un ballonnet réflecteur (50) rempli de gaz, un ballonnet structurel (28) rempli de liquide et un transducteur à ultrasons (20) placé dans le ballonnet structurel. L'énergie acoustique émise par le transducteur est réfléchie par une interface à haut pouvoir de réflexion disposée entre les ballonnets. Dans une procédure d'ablation de tissu cardiaque, l'énergie ultrasonore est focalisée sur des régions focales annulaires (44) afin d'éliminer du tissu cardiaque selon un tracé annulaire le long de la paroi. L'invention concerne aussi des dispositifs destinés à stabiliser la structure de ballonnet et aussi à faciliter le repliement et l'enlèvement de la structure de ballonnet.
Acker David E.
Fjield Tood
Harhen Edward Paul
Lopath Patrick David
Moffat & Co.
Recor Medical Inc.
Transurgical Inc.
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