Patent ID: 6551255
Filing Date: 2003-04-22
Classification: A61B

Abstract:
A biopsy instrument for securing and coring a mass within the breast of a human patient during a biopsy of said mass, said biopsy instrument comprising:an adhesion probe adapted for insertion into body tissue and adhering to body tissue; a coring mechanism adapted for use with the adhesion probe, said coring mechanism having a distal end and a proximal end, said coring mechanism comprising: a cannula adapted for insertion into the body of the patient, said cannula having a lumen extending through the cannula and defining a proximal opening and a distal opening in the cannula; a cannula translating mechanism operably connected to the cannula; and a cannula rotating mechanism operably connected to the cannula; a housing encasing the cannula translating mechanism and the cannula rotating mechanism, said housing having a proximal end and a distal end, the cannula extending from within said housing and out through the distal end of said housing; wherein said adhesion probe is fitted through the lumen of the cannula; wherein the cannula translating mechanism comprises: a pneumatic or hydraulic cylinder having a chamber, said cylinder having a proximal end and a distal end; a piston disposed within the chamber of the cylinder, said piston being capable of longitudinal translation along the chamber of the cylinder, said piston having a bore sized to approximate the outer diameter of the cannula; and a tube for delivering an operating fluid or applying a vacuum to the chamber of the cylinder, said tube extending from an operating fluid or vacuum source, and terminating at the cylinder; wherein the cannula is fixedly attached to the piston through the bore of said piston, and extends through the distal end of the cylinder, and moves distally and proximally in response to operation of the piston.