Patent ID: 8597204
Filing Date: 2013-12-03
Classification: A61B

Abstract:
1. A biopsy device, comprising: a housing; a coring cannula coupled to the housing and having a longitudinal axis and a shaft centered on the axis; a stylet having a tip containing at least one blade, a central passage centered along the same axis as the shaft of the coring cannula, and a guide portion extending past the opening of the central passage; a motor assembly coupled to the coring cannula for controllably rotating the cannula; a variable speed circuit electrically coupled to the motor assembly; a forward/reverse switch electrically coupled to the variable speed circuit for controlling the direction of movement of the cannula; a speed control trigger electrically coupled to the variable speed circuit, the variable speed circuit for responsively controlling the speed and rotation of the cannula as a function of the forward/reverse switch and actuation of the speed control trigger; and, a needle assembly, the needle assembly including: