Instrument and apparatus for biopsy and a method thereof

Details Instrument and apparatus for biopsy and a method thereof Instrument and apparatus for biopsy and a method thereof

A - Human Necessities

61

B

A61B 10/00 (2006.01)

Patent

CA 2211315

A biopsy instrument includes a tube having a finger-like projection at one end and a canula slidably disposed in the tube. After insertion of the biopsy instrument into a tissue, the tube is displaced on the canula so that the projection passes through an aperture in the canula to sever the tissue sample in the canula bore from the tissue. The projection retains the severed sample in the canula bore during withdrawal of the biopsy instrument from the tissue. A holding and control assembly having a first and second spring is provided for moving the tube and canula in a forward direction to penetrate the tissue and then substantially consecutively moving the tube in the forward direction to sever and retain the sample in the canula bore.

Cette invention concerne un instrument de biopsie, se composant d'un tube ayant, à une extrémité, un élément saillant en forme de doigt, et d'une canule coulissant à l'intérieur dudit tube. Une fois l'instrument de biopsie introduit dans un tissu, le tube se déplace le long de la canule de manière à ce que l'élément saillant passe à travers une ouverture pratiquée dans celle-ci, ceci afin de découper un échantillon de tissu et de le ramener dans le corps de ladite canule. Pendant que l'on retire l'instrument de biopsie du tissu, l'élément saillant retient l'échantillon découpé dans le corps de la canule. Un dispositif de maintient de la commande, comportant un premier puis un second ressort, permet de faire avancer le tube et la canule vers l'avant afin de les faire pénétrer dans le tissu, et de déplacer ensuite sensiblement le tube vers l'avant afin de découper un échantillon et de le retenir dans le corps de la canule.

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