Patent ID: 8672860
Filing Date: 2014-03-18
Classification: A61B

Abstract:
1. A biopsy device, comprising: (a) a body; (b) a needle extending distally from the body, wherein the needle defines a first lumen configured to receive a cutter, wherein the needle further comprises a transverse aperture in communication with the first lumen, the transverse aperture being configured to receive tissue; (c) a cutter disposed in the first lumen of the needle, wherein the cutter defines a cutter lumen, wherein the cutter is configured to translate within the first lumen to sever tissue protruding through the transverse aperture; (d) a motor having a drive shaft, wherein the motor is operable to rotate the drive shaft in a first direction; and (e) a cutter translation assembly in communication with the cutter, wherein the cutter translation assembly is operable to translate the cutter proximally in the first lumen in response to rotation of the drive shaft in the first direction, wherein the cutter translation assembly is further operable to translate the cutter distally in the first lumen in response to rotation of the drive shaft in the first direction, wherein the cutter translation assembly comprises a first resilient member operable to bias the cutter translation assembly in the proximal direction and a second resilient member operable to bias the cutter translation assembly in the distal direction.