Biopsy instrument with handle and needle set

• US 5,752,923 A
• Filed: 06/24/1996
• Issued: 05/19/1998
• Est. Priority Date: 06/24/1996
• Status: Expired due to Term

• Current Assignee: Medical Device Technologies, Inc. (Angiotech Pharmaceuticals Incorporated)
• Original Assignee: Medical Device Technologies, Inc. (Angiotech Pharmaceuticals Incorporated)
• Inventors: Terwilliger, Richard A.
• Primary Examiner(s): Millin, Vincent
• Assistant Examiner(s): Nguyen, Dinh X.
• Application Number:
  US08/669,039
• Time in Patent Office: 694 Days
• Field of Search: 128/749, 128/751, 128/753, 128/754, 604/156, 604/158, 604/159, 604/164, 604/171, 604/157, 600/562, 600/564-67
• US Class Current: 600/562
• 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 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms

Abstract

A biopsy instrument 40 includes a handle 1 and a disposable biopsy needle set or needle cartridge 20. The needle set includes a cannula 9 with a cannula hub 8 and a stylet 7 with a stylet hub 6. The needle set 20 is positionable within the handle 1 and actuatable thereby for purposes of taking a biopsy tissue sample. The needle set 20 and in particular the hubs 6, 8, in combination with the handle 1, perform the actuation sequence which allows the needle to be projected into the tissue to be biopsied and the cannula to be subsequently urged over the needle to collect the tissue.

Claims

1. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub is C-shaped; and

said second needle hub is C-shaped.

2. The system of claim 1 wherein:

said first needle is a solid stylet; and

said second needle is a hollow cannula.

3. The system of claim 1 wherein:

said first needle is a first hollow cannula; and

said second needle is a second hollow cannula.

4. The system of claim 1 wherein:

said first needle includes a groove adapted for collection a tissue sample; and

said second needle is a cannula which is adapted for severing the collected tissue sample so that the tissue sample can be removed from a biopsy site.

5. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first body with a first arm and a second arm extending from said first body;

said second needle has a second body with a third arm and a fourth arm extending from said second body; and

wherein said third arm is positioned between said first arm and second arm.

6. The system of claim 5 wherein:

said first needle is a stylet that is secured to said second arm and extends through the second needle which is a cannula; and

said second needle is secured to said third arm and extends through a port in said first arm.

7. The system of claim 5 wherein:

said second arm is position between said third arm and said fourth arm.

8. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

at least one of said first and said second needle hubs has a tab which can interlock with at least one of the other of said first needle hub and said second needle hub.

9. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first body with a first handle engaging port positioned transverse to said first body; and

said second needle hub has a second body with a second handle engaging port positioned transverse to said second body.

10. The system of claim 9 including:

a first position wherein said first needle extends out from said second needle and a second position wherein said first needle is substantially withdrawn inside of said second needle; and

wherein said first handle engaging port is along side of said second handle engaging port with the system in the second position.

11. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first long arm and a second short arm;

said second needle hub has a third short arm and a fourth long arm; and

said third short arm is disposed between the first long arm and the second short arm and the second short arm is disposed between the third short arm and the fourth long arm.

12. The system of claim 11 wherein:

said system has a first position with the third short arm positioned against the first long arm and the second short arm positioned against the fourth long arm, and a second position with the second short arm against the third short arm; and

in the second position said first needle extends from said second needle.

13. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first elongated body;

said second needle hub has a second elongated body;

said first elongated body is substantially parallel to said second elongated body;

said first needle hub has a first groove which extends along said first elongated body;

said second needle hub has a second groove which extends along said second elongated body; and

said first groove is substantially parallel to said second groove.

14. The system of claim 13 wherein:

said first groove is adapted to engage a handle which can operate said system; and

said second groove is adapted to engage a handle which can operate said system.

15. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first handle engaging port; and

said second needle hub has a second handle engaging port.

16. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

said first needle hub has a first plurality of handle engaging ports; and

said second needle hub has a second plurality of handle engaging ports.

17. A needle system comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first needle and the second needle movable relative to each other; and

said first needle hub and said second needle hub interfere such that the movement of the first needle relative to the second needle is restricted in a forward and a reverse direction;

the system including a first needle system and a second needle system;

each needle system including a first needle secured to a first needle hub and a second needle secured to a second needle hub;

each of said first needle hubs including a first handle engaging port and each of said second needle hubs including a second handle engaging port; and

the first and second handle engaging ports of said first needle set are located in different locations on the first and second needle hubs of said first needle system than are the first and second handle engaging ports of said second needle set.

18. A needle system for collecting a tissue sample comprising:

a first needle secured to a first needle hub;

a second needle secured to a second needle hub;

said first needle positioned inside of said second needle with the first and second needles movable relative to each other;

said first needle hub having a first groove;

said second needle hub having a second groove, wherein said first groove and said second groove are parallel to said first and said second needles;

said first needle hub has a first handle engaging port which is skewed to said first and said second needles; and

said second needle hub has a second handle engaging port which is skewed to said first and said second needles.

19. The system of claim 18 wherein:

said first and said second handle engaging ports are substantially perpendicular to said first and said second needles.

20. The system of claim 18 wherein:

said first and said second needles are located between said first handle engaging port and said second handle engaging port.

21. The system of claim 18 wherein:

said first needle hub is located along side of said second needle hub; and

said first and said second needles are located for the most part between said first needle hub and said second needle.

22. The system of claim 18 wherein:

said first needle and said second needle are located between said first groove and said second groove.

23. A needle set comprising;

a first needle;

a first hub means for transporting said first needle;

a second needle;

a second hub means for transporting said second needle;

said first needle positioned inside of said second needle with the first hub means and said second hub means allowing the first needle and the second needle to move relative to each other;

said first hub means having first means for restricting the movement of the second hub means relative thereto; and

said second hub means having second means for restricting the movement of the first hub means relative thereto.

24. A biopsy handle and biopsy needle set cartridge system comprising:

said biopsy needle set cartridge having;

a. a first needle secured to a first needle hub;

b. a second needle secured to a second needle hub;

c. said first needle positioned inside of said second needle with the first and second needle movable relative to each other;

d. said first needle hub having a first groove;

said second needle hub having a second groove, wherein said first groove and said second groove are parallel to said first and second needles;

e. said first needle hub has a first biopsy handle engaging port which is skewed to said first and said second needles; and

f. said second needle hub has a second biopsy handle engaging port which is skewed to said first and said second needles;

said biopsy handle having;

g. a first needle drive mechanism with a first drive pin;

h. a second needle drive mechanism with a second drive pin;

i. said first needle drive mechanism being shaped in order to receive said first groove of said biopsy needle set cartridge thereover;

j. said second needle drive mechanism being shaped in order to receive said second groove of said biopsy needle set cartridge thereover; and

k. with said first drive pin being received in said first biopsy handle engaging port and said second drive pin being received in said second biopsy handle engaging port.

25. The system of claim 24 wherein:

said biopsy handle has a body with a front side; and

said biopsy handle includes a port located substantially in the center of said front side, which port can receive said first and said second needles.

26. The system of claim 24 wherein:

said biopsy handle has a lateral side that is substantially parallel to said first needle and said second needle; and

a trigger slidably mounted in said lateral side, said trigger slidable in order to actuate said needle set.

27. A biopsy handle comprising:

a first needle drive mechanism;

a second needle drive mechanism which is substantially parallel to said first needle drive mechanism;

said first needle drive mechanism is positioned along side of said second needle drive mechanism;

said first needle drive mechanism and said second needle drive mechanism each have a cocked position and a released position;

a first trigger mechanism;

a second trigger mechanism;

said first needle drive mechanism being held in said cocked position by said first trigger mechanism;

said second needle drive mechanism begin held in said cocked position by said second trigger mechanism;

said handle being adapted to receive a needle set;

said second trigger is adapted to be operated by said needle set in order to release said second needle drive mechanism from the cocked position after the first trigger releases said first needle drive mechanism from the cocked position;

a first drive pin extending from said first needle drive mechanism, which first drive pin is adapted for selectively positioning a first needle of a needle set; and

a second drive pin extending from said second needle drive mechanism, which second drive pin is adapted for selectively positioning a second needle of a needle set.

28. A biopsy handle comprising:

a first needle drive mechanism;

a second needle drive mechanism which is substantially parallel to said first needle drive mechanism;

said first needle drive mechanism is positioned along side of said second needle drive mechanism;

said first needle drive mechanism and said second needle drive mechanism each have a cocked position and a released position;

a first trigger mechanism;

a second trigger mechanism;

said first needle drive mechanism being held in said cocked position by said first trigger mechanism;

said second needle drive mechanism begin held in said cocked position by said second said mechanism;

said handle being adapted to receive a needle set;

said second trigger is adapted to be operated by said needle set in order to release said second needle drive mechanism from the cocked position after the first trigger releases said first needle drive mechanism from the cocked position;

a first knob for urging said first needle drive mechanism to the cocked position; and

a second knob for urging said second needle drive mechanism to the cocked position.

29. A biopsy handle comprising:

a housing adapted for accepting a needle set with a first needle and a second needle;

said housing having a first means adapted for driving the first needle of the needle set;

said housing having a second means adapted for driving the second needle of said needle set after said first means drives said first needle, which second means is adapted to be actuated by the needle set after the first means drives the first needle of the needle set; and

a first drive pin extending from said first driving means, which first drives pin is adapted for selectively positioning a first needle of a needle set, and second drive pin extending from said second driving means, which second drive pin is adapted for selectively positioning a second needle of a needle set.

30. A biopsy handle comprising:

a housing adapted for accepting a needle set with a first needle and a second needle;

said housing having a first driver which has a first cocked position and which is adapted to drive the first needle;

a first trigger that can hold said first driver in the first cocked position;

said housing having a second driver which has a second cocked position and which is adapted to drive the second needle;

a second trigger that can hold the second driver in the second cocked position; and

wherein releasing the first trigger causes the first driver to drive the first needle which causes the needle set to release the second trigger in order to drive the second needle;

said second trigger has a lever extending therefrom, which lever is adapted to be engaged by the needle set after the first driver drives the first needle in order to release said second trigger.

31. A biopsy handle comprising:

a housing adapted for accepting a needle set with a first needle and a second needle;

said housing having a first driver which has a first cocked position and which is adapted to drive the first needle;

a first trigger that can hold said first driver in the first cocked position;

said housing having a second driver which has a second cocked position and which is adapted to drive the second needle;

a second trigger that can hold the second driver in the second cocked position; and

wherein releasing the first trigger causes the first driver to drive the first needle which causes the needle set to release the second trigger in order to drive the second needle;

said second driver is cylindrical in shape; and

extending from said second trigger is a lever which wraps around the second driver and is accordingly adapted to be engaged by the needle set in order to release said second trigger.