Biopsy device and insertable biopsy needle module

• US 8,951,209 B2
• Filed: 04/18/2012
• Issued: 02/10/2015
• Est. Priority Date: 03/19/2002
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Heske, Norbert, Heske, Thomas
• Primary Examiner(s): Cohen, Lee S
• Assistant Examiner(s): LLOYD, EMILY M
• Application Number:
  US13/449,996
• Publication Number:
  US 20120238905A1
• Time in Patent Office: 1,028 Days
• Field of Search: 600/564, 600/567, 600/568, 600/566
• US Class Current: 600/568
• CPC Class Codes: A61B 10/0275 with sample notch, e.g. on the side of inner stylet
• CPC Class Codes: A61B 10/0283 with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe A61B10/025, A61B10/0266 take precedence
• CPC Class Codes: A61B 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms
• CPC Class Codes: A61B 2010/0225 for taking multiple samples
• CPC Class Codes: A61B 2017/00128 related to intensity or progress of surgical action
• CPC Class Codes: A61B 2017/00199 with a console, e.g. a control panel with a display
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument

Abstract

A biopsy device includes a disposable unit including a needle carrier and a biopsy needle. The biopsy needle has a distal portion including a sample chamber and a hub portion located proximal to the sample chamber. The needle carrier has a holding portion. The holding portion and the hub portion are collectively configured to form a detent mechanism configured to permit the biopsy needle to rotate within needle carrier to rotationally position the sample chamber while restraining rotation of the biopsy needle at a series of rotational detent positions.

Claims

1. A biopsy device, comprising:

a disposable unit including a needle carrier and a biopsy needle;

the biopsy needle having a longitudinal axis and a distal portion including a sample chamber;

a hub portion connected to the biopsy needle proximal to the sample chamber;

a distal portion of the hub portion comprising a polygonal member;

the needle carrier having a holding portion, the holding portion comprising two opposing surface engagement portions;

wherein the disposable unit is configured such that the polygonal member remains between the two opposing surface engagement portions;

wherein the polygonal member is in a detent position when the two opposing surface engagement portions are spaced such that two opposing parallel sides of the polygonal member are substantially parallel to the two opposing surface engagement portions and have a slight gap between each of the opposing parallel sides and the closest opposing engagement portion;

wherein the two engagement portions have an elasticity such that the two engagement portions are configured to allow manual rotation of the hub portion to cause the engagement portions to spread apart to allow the polygonal member to rotate through a series of detent positions, and wherein each detent position corresponds to an angular position of the sample chamber specific to that detent position; and

wherein the two engagement portions are configured to not spread apart when the resistance of the engagement portions is greater than the applied torque, such that the two engagement portions limit the movement of the polygonal member and thus the movement of the biopsy needle.

2. The biopsy device of claim 1, wherein a proximal end of the hub portion has an indicator that corresponds to the angular position of the sample chamber.

3. The biopsy device of claim 1, wherein the polygonal member is a hexagon and the number of the series of detent positions is six.

4. The biopsy device of claim 1, wherein the hub portion includes a knob at a proximal end of the hub portion so as to be accessible to a user for the manual rotation of the hub portion, the knob configured to rotate the sample chamber to a desired rotational angular position corresponding to one of the series of detent positions.

5. The biopsy device of claim 1, wherein the hub portion includes a knob at a proximal end of the hub portion so as to be accessible to a user for the manual rotation of the hub portion, the knob configured to rotate the sample chamber to a desired rotational angular position corresponding to one of the series of detent positions;

and further comprising a drive mechanism comprising a motor, the drive mechanism is configured to move the biopsy needle in an oscillatory manner to assist in severing tissue.

6. The biopsy device of claim 5, comprising a cutting sheath coaxially carried by the biopsy needle, the cutting sheath being drivably connected to the drive mechanism, and the drive mechanism configured for oscillatory driving of the cutting sheath, and the biopsy needle configured for receiving a reaction force resulting from the oscillatory driving of the cutting sheath through the cutting sheath to the biopsy needle to move the biopsy needle in oscillation.

7. The biopsy device of claim 5, wherein the drive mechanism as limited by the holding portion and hub portion, is configured to move the biopsy needle in a limited angular-rotational movement in opposite and alternating first and second rotational directions about the longitudinal axis of the biopsy needle.

8. The biopsy device of claim 5, wherein the drive mechanism as limited by the holding portion and hub portion, is configured to move the biopsy needle in a limited angular-rotational movement in opposite and alternating first and second rotational directions about the longitudinal axis of the biopsy needle superimposed with a longitudinally oscillating movement of the biopsy needle along the longitudinal axis.