Distal Tip Configurations for Biopsy with EUS FNA

• US 20120197157A1
• Filed: 01/31/2012
• Published: 08/02/2012
• Est. Priority Date: 01/31/2011
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Ryan, Shawn, Gaudet, Caroline, Burnim, Kayla, Whitney, Andrew, Weitzner, Barry
• Application Number:
  US13/362,278
• Publication Number:
  US 20120197157A1
• Time in Patent Office: Days
• US Class Current: 600/567
• CPC Class Codes: A61B 10/0266 means for severing sample
• CPC Class Codes: A61B 10/04 Endoscopic instruments
• CPC Class Codes: A61B 2010/045 Needles pointed biopsy devices with vacuum aspiration A61B10/0283

Abstract

A biopsy device includes a needle extending longitudinally from a proximal end to a distal end and including a channel extending therethrough and a stylet extending through the channel of the needle and including a coil at a distal end thereof such that rotation of the stylet relative to the needle moves the coil from a closed configuration in the channel to a tissue collecting configuration in which the coil extends distally past the distal end of the needle to be inserted into a target tissue.

Claims

1. A stylet for insertion into a biopsy needle, comprising:

a coil at a distal end thereof such that advancement of the stylet relative to the needle moves the coil from a closed configuration in the needle to a tissue collecting configuration in which the coil extends distally past the distal end of the needle.

2. The stylet of claim 1, wherein the coil is rotatable relative to the needle to be inserted into a target tissue.

3. The stylet of claim 1, further comprising:

a shaft such that the coil is attachable to a distal end of a shaft.

4. The stylet of claim 1, wherein the coil extends substantially helically about a longitudinal axis of the stylet.

5. A biopsy device, comprising:

a tissue collecting element including a distal portion extending longitudinally from a proximal end to a distal end and including a lumen extending therethrough, the distal end including a slot extending along a portion of a length thereof to form opposing jaws for collecting a target tissue therebetween and into the lumen.

6. The device of claim 5, wherein the slot is substantially U-shaped such that a distal face of the tissue collecting element oscillates about a longitudinal axis thereof.

7. The device of claim 5, wherein the tissue collecting element includes a first protrusion extending radially inward from an inner surface of the lumen, the first protrusion configured to grasp tissue received within the lumen.

8. The device of claim 7, wherein tissue collecting element includes a second protrusion extending radially inward from the inner surface of the lumen, the second protrusion being substantially diametrically opposed from the first protrusion.

9. The device of claim 7, wherein first protrusion is configured as one v-shaped cut along a wall of the tissue collecting element, a barb, spike, hook and tooth.

10. The device of claim 5, wherein the distal portion is releasably couplable to a proximal portion of the tissue collecting element.

11. The device of claim 10, wherein the distal portion is couplable portion via one of a latch mechanism, a snap-fit and a thread.

12. The device of claim 5, wherein the distal portion includes a first side opening extending through a wall thereof, the first side opening including a cutting edge extending about a periphery thereof.

13. The device of claim 12, wherein the first side opening is in the shape of a cylinder intersecting the wall substantially perpendicular to a longitudinal axis of the tissue collecting element.

14. The device of claim 12, wherein the first side opening is in the shape of a cylinder intersecting the wall at an angle of approximately 45 degrees relative to a longitudinal axis of the tissue collecting element.

15. The device of claim 12, wherein the tissue collecting element includes a plurality of openings extending through a portion of the wall opposing the first side opening, the second side opening including a cutting edge extending about a periphery thereof.

16. The device of claim 5, wherein the opposing jaws include leading edges along an inner surface thereof such that moving the tissue collecting element distally through a target tissue separates the opposing jaws to receive the target tissue therebetween.

17. The device of claim 5, wherein the tissue collecting element is sized and shaped for insertion through a channel of a needle.

18. A stylet for insertion into a biopsy needle, comprising:

a tissue collecting element including a distal portion extending longitudinally from a proximal end to a distal end and including a lumen extending therethrough, the distal end including a slot extending along a portion of a length thereof to form opposing jaws for collecting a target tissue therebetween and into the lumen.

19. A biopsy stylet sized and shaped for slidable insertion through a channel of a biopsy needle, the stylet including a coil at a distal end thereof such that rotation of the stylet relative to the needle moves the coil from a closed configuration in the channel to a tissue collecting configuration in which the coil extends distally past a distal end of the needle to be inserted into a target tissue.

20. The stylet of claim 20, wherein the coil includes a varying pitch along a length thereof.

21. The stylet of claim 20, wherein the coil is tapered from a proximal end to a distal end thereof.

22. The stylet of claim 20, wherein the coil includes a sharp edge.

23. The stylet of claim 23, wherein a distal tip of the coil includes a sharp edge.