Deflectable biopsy device

摘要

Disclosed is a deflectable biopsy device that includes a cannula having a preformed bend, wherein the shape of the cannula can be temporarily altered with the cannula returning to its original shape afterward. The deflectable biopsy device also includes a sampling member slidably disposed within the cannula and operable therewith to collect a tissue biopsy.

主权项

1. A deflectable biopsy device for collecting a tissue biopsy, comprising: a cannula comprising a wall between a proximal end and a distal end defining a cannula lumen therebetween, the cannula, when in an unstressed condition defines a geometry including a preformed bend having a first shape positioned between the proximal and distal ends, wherein said preformed bend is constrainable by a constraining force to alter the geometry of said preformed bend to a second shape and wherein, upon release of the constraining force, the geometry of said preformed bend substantially returns to the first shape; a sampling member slidably disposed within said cannula lumen, said sampling member defining a sampling cavity and being cooperable with said cannula to sever and trap a tissue biopsy in said sampling cavity, wherein said sampling member and said cannula are constructed and arranged to allow the sampling member to slidably navigate the first shape of the preformed bend of said cannula without binding, and wherein said sampling member includes a first portion and a second portion, wherein said second portion is positioned between said first portion and said sampling cavity, and wherein said second portion is more flexible than said first portion; and a firing mechanism engaged to a cannula hub at the proximal end of said cannula and a sampling member hub at a proximal end of said sampling member, wherein said firing mechanism is constructed and arranged to rapidly move said cannula relative to said sampling member from a second position in which said sampling member extends through said cannula with the sampling cavity protruding outside of and not covered by said cannula to a first position in which the sampling cavity is covered by said cannula, and wherein, in the first position, said second portion of said sampling member is aligned with said preformed bend of said cannula.