Micro-invasive breast biopsy device

Details Micro-invasive breast biopsy device Micro-invasive breast biopsy device

A - Human Necessities

61

B

A61B 10/00 (2006.01)

Patent

CA 2442110

An apparatus (10) for removing tissue and/or other material from a patient, particularly a breast of a patient, is provided. The apparatus (10) generally includes a handpiece (14) and a tissue removal mechanism (16) connected thereto. The tissue removal mechanism (16) includes a cannula having an open distal tip and an outer diameter of less than about 5 mm, or less than about 2 mm. The mechanism (16) further includes a rotatable element having a distal portion with helical threading (56). The distal portion of the rotatable element (34) extends beyond the open distal tip of the cannula (30) in order to allow tissue to prolapse between turns of the helical threading (56). The apparatus is designed to draw soft tissue into the cannula (30) upon rotation of the rotatable element (34) and without the need for supplemental sources of aspiration.

L'invention concerne un appareil (10) conçu pour retirer des tissus et/ou d'autres matières d'un patient, et en particulier d'un sein d'une patiente. De manière générale, cet appareil (10) comporte une pièce à main (14) et un mécanisme (16) de retrait tissulaire connecté à ladite pièce à main (14). Le mécanisme (16) de retrait tissulaire comprend une canule (30) pourvue d'une extrémité distale ouverte et présentant un diamètre extérieur inférieur à environ 5 mm ou environ 2 mm. Ledit mécanisme (16) comporte en outre un élément rotatif pourvu d'une partie distale munie d'un filet hélicoïdal (56). La partie distale de l'élément rotatif (34) s'étend au-delà de l'extrémité distale ouverte de la canule (30) pour permettre au tissu de descendre entre les tours du filet hélicoïdal (56). L'appareil est conçu pour aspirer du tissu mou dans la canule (30) par rotation de l'élément rotatif (34) et sans avoir à recourir à des sources d'aspiration supplémentaires.

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