Angioplasty device incorporating transmission member and...

A - Human Necessities – 61 – B

Patent

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A61B 17/22 (2006.01) A61B 17/00 (2006.01) A61B 17/32 (2006.01) A61B 18/00 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2099011

An ultrasonic angioplasty device comprising an elongate ultrasound transmission member (20) having a proximal end attachable to an ultrasound generating device and a bulbous distal head (22) or probe formed on the distal end thereof for effecting ablative treatment of an occluding lesion. The ultrasound transmission member (20) may be formed of one or more superelastic metal alloys such as Niti (50 at. % Ni). A guidewire lumen (14) may be formed in the distal head or probe to permit passage of a guidewire therethrough. Portions of the ultrasound transmission member may be curved or bent. Portions of the ultrasound transmission member may be tapered or narrowed. One or more surface disruptions may be formed on the distal head or probe to improve treatment efficacy. An increased hardness coating or outer skin may be formed on the ultrasound transmission member. The device of the present invention may be incorporated into an angioscopic device.

Dispositif d'angioplastie à ultrasons (10) comprenant un élément de transmission d'ultrasons allongé (20) pourvu d'une extrémité proximale pouvant être fixée à un dispositif produisant des ultrasons (2) et d'une sonde ou tête (22) distale bulbiforme (22) se trouvant sur son extrémité distale et servant à effectuer un traitement par ablation d'une lésion occlusive. L'élément de transmission d'ultrasons (20) peut être fabriqué à partir d'un ou plusieurs alliages métalliques superélastiques tels que NiTi (50 % atomique de Ni). Un passage (35) pour fil de guidage peut être pratiqué dans la tête ou la sonde distale (22) afin de permettre à un fil de guidage (34) de passer à travers celle-ci. Des parties de l'élément de transmission d'ultrasons (20) peuvent être incurvées ou pliées. D'autres parties de cet élément (20) peuvent être rétrécies. Une ou plusieurs ruptures (41, 42) superficielles peuvent être pratiquées sur la tête ou la sonde distale (22) pour améliorer l'efficacité du traitement. L'élément de transmission d'ultrasons (20) peut être pourvu d'une enveloppe externe (50) ou d'un revêtement d'une dureté accrue. Le dispositif (10) de la présente invention peut être intégré à un dispositif angioscopique (70).

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