Biopsy device with variable speed cutter advance

• US 20060129063A1
• Filed: 02/13/2006
• Published: 06/15/2006
• Est. Priority Date: 02/25/2003
• Status: Active Grant

• Current Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Original Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Inventors: Thompson, Bennie, DaPrato, Larry
• Granted Patent: US 7,645,240 B2
• Time in Patent Office: Days
• US Class Current: 600/566
• CPC Class Codes: A61B 10/0266 means for severing sample
• CPC Class Codes: A61B 10/0275 with sample notch, e.g. on the side of inner stylet
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids

Abstract

A biopsy device having a translating and rotating cutter is disclosed. The translational speed of the cutter is varied using a variable pitch member. The variable pitch member can include a shaft having a relatively coarse threaded portion for rapid cutter advance and a relatively finer threaded portion for cutter advance during tissue severing.

Claims

1-18. -18. (canceled)

19. A handheld biopsy device comprising:

a cannula for receiving tissue;

a hollow cutter coaxial with the outer cannula;

the hollow cutter supported for translation and rotation with respect to the outer cannula;

a first rotationally driven member, the first rotationally member adapted to provide variable speed translation of the cutter without variation of the rotational speed of the first rotationally driven member; and

a second rotationally driven member for providing rotation of the cutter.

20. The biopsy device of claim 19 comprising at least one motor for driving the first and second rotationally driven members.

21. The biopsy device of claim 20 comprising a first motor for driving the first rotationally driven member, and a second motor for driving the second rotationally driven member.

22. The biopsy device of claim 21 wherein the motors are electric motors.

23. The biopsy device of claim 19 comprising a single motor for driving the first rotationally driven member and the second rotationally driven member.

24. A handheld biopsy device comprising:

a probe assembly, the probe assembly comprising;

a cannula for receiving tissue;

a hollow cutter coaxial with the outer cannula;

the hollow cutter supported for translation and rotation with respect to the outer cannula;

a holster, the holster detachably connected to the probe assembly, the holster comprising;

at least one motor for powering movement of the hollow cutter;

first motor

wherein the biopsy device is adapted to provide variation in the translational speed of the cutter without varying the speed of operation of the motor.

25. The biopsy device of claim 24 comprising a first motor for powering translation of the cutter and a second motor for providing rotation of the cutter.

26. The biopsy device of claim 24 wherein the motor comprises an electric motor.