Biopsy device with variable speed cutter advance

Details Biopsy device with variable speed cutter advance Biopsy device with variable speed cutter advance

A - Human Necessities

61

B

A61B 10/00 (2006.01)

Patent

CA 2517242

A biopsy device (20) having a translating and rotating cutter (104) disposed within an outer cannula (80) is disclosed. The translational speed of the cutter (104) is varied using a variable pitch member (142). The variable pitch member (142) can include a shaft having a relatively coarse threaded portion (146) for rapid cutter advance and a relatively finer threaded portion (148) for cutter advance during tissue severing.

L'invention concerne un dispositif de biopsie à instrument tranchant capable de translation et de rotation. La vitesse de translation varie grâce à l'utilisation d'un élément à pas variable. Cet élément peut comprendre un arbre à partie filetée relativement brute permettant une avance rapide de l'instrument tranchant, et une partie filetée relativement plus fine pour l'avance de l'instrument durant la découpe de tissu.

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