Device and method for opening blood vessels by...

A - Human Necessities – 61 – M

Patent

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A61M 25/00 (2006.01) A61B 17/34 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2718067

A device and method for intravascular treatment of atherosclerotic plaque perforates the plaque with microperforations by small sharp spikes to act as serrations for forming cleavage lines or planes in the plaque. In preferred embodiments, expansion may be obtained by mechanical apparatus, expansion balloon, or balloon- assisted deployment. The plaque treatment enables a subsequent balloon angioplasty to be performed without creating substantial dissections and at low balloon pressure so as to avoid injury to the arterial wall. The plaque treatment may include dilatation of the plaque at low pressure, sufficiently that no subsequent balloon angioplasty is needed. The plaque preparation may be followed by applying one or a few ring tacks to secure the compressed plaque with minimal emplacement of foreign material.

Un dispositif et un procédé de traitement intravasculaire d'une plaque athéroscléreuse, permettent de perforer la plaque avec des micro-perforations effectuées par de petites pointes acérées de façon à agir comme des dentelures afin de former des lignes ou des plans de clivage dans la plaque. Selon les modes de réalisation préférés, il est possible d'obtenir une expansion à l'aide d'un appareil mécanique, dun ballonnet expansible, ou d'un déploiement assisté par ballonnet. Le traitement de la plaque permet d'exécuter une angioplastie ultérieure par ballonnet sans créer de dissections substantielles et à une pression faible de ballonnet, afin d'éviter d'endommager la paroi artérielle. Le traitement de la plaque peut inclure une dilatation de la plaque à une pression faible, suffisamment pour qu'aucune angioplastie par ballonnet ultérieure ne soit nécessaire. La préparation de la plaque peut être suivie par l'application dune ou de quelques pointes annulaires de manière à fixer la plaque comprimée avec une mise en place minimale de matériau étranger.

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