Ablation device for reducing damage to vessels and/or...

A - Human Necessities – 61 – B

Patent

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A61B 17/22 (2006.01) A61B 17/32 (2006.01)

Patent

CA 2347754

An ablation burr has a body provided with an inner circumferential rim and an outer circumferential rim that are concentric and spaced longitudinally by a selected distance along the length of the burr. The outer circumferential rim has a generally smooth convex outer surface that reduces damage to a vessel wall or stent. A leading surface of the burr extends between the inner and outer circumferential rims in a substantially uniform, convave manner. An abrasive, for example, diamond grit, is provided on the leading surface. The burr is selectively rotated by a drive shaft, causing the abrasive leading surface of the burr to ablate unwanted deposits.

Une fraise d'ablation possède un corps pourvu d'un bord intérieur périphérique et d'un bord extérieur périphérique qui sont concentriques et écartés l'un de l'autre dans le sens de la longueur sur une distance sélectionnée de la longueur de la fraise. Le bord extérieur périphérique possède une surface extérieur convexe généralement lisse qui limite la détérioration occasionnée à la paroi du vaisseau ou au tuteur intravasculaire. Une surface avant de la fraise s'étend entre les bords périphériques intérieur et extérieur de façon concave sensiblement uniforme. La surface avant comporte un abrasif, par exemple, du grain de diamant. La fraise est mise en rotation de manière sélective par un arbre d'entraînement, ce qui provoque l'ablation de dépôts indésirables par la surface avant abrasive de la fraise.

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