Micro-invasive tissue removal device

Details Micro-invasive tissue removal device Micro-invasive tissue removal device

A - Human Necessities

61

B

A61B 10/00 (2006.01)

Patent

CA 2442572

An apparatus for removing tissue and/or other material from a patient is provided. The apparatus generally includes a handpiece (14) and a tissue removal mechanism (16) connected thereto. The tissue removal mechanism (16) includes a cannula (30) having an open distal tip and an outer diameter of less than about 5 mm or less than about 2mm. The mechanism further includes a rotatable element (34) having a distal portion (40) with helical threading. The distal portion of the rotatable element extends beyond the open distal tip of the cannula (30) in order to allow tissue to prolapse between turns of the helical threading. The apparatus is designed to draw soft tissue into the cannula (30) upon rotation of the rotatable element without the need for supplemental sources of aspiration.

L'invention porte sur un appareil à extraire un tissu et/ou une autre matière d'un patient. L'appareil comprend généralement un outil à main (14) et un mécanisme d'extraction de tissu (16) fixé à l'outil. Le mécanisme d'extraction de tissu (16) comprend une canule (30) présentant une extrémité distale ouverte et un diamètre extérieur inférieur à environ 5 mm ou à environ 2 mm. Le mécanisme comprend en outre un élément rotatif (34) présentant une partie distale (40) munie d'un filetage hélicoïdal. Cette partie distale de l'élément rotatif s'étend au-delà de l'extrémité distale ouverte de la canule (30) pour permettre au tissu de descendre entre les courbures du filetage hélicoïdal. L'appareil est conçu pour aspirer un tissu mou à l'intérieur de la canule (30) par rotation de l'élément rotatif, sans nécessité de recourir à d'autres sources d'aspiration.

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