Instruments and methods for aggressive yet continuous tissue removal

• US 20060224160A1
• Filed: 04/01/2005
• Published: 10/05/2006
• Est. Priority Date: 04/01/2005
• Status: Abandoned Application

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Sherman, Michael C., Trieu, Hai H., Li, Lehmann K.
• Application Number:
  US11/095,652
• Publication Number:
  US 20060224160A1
• Time in Patent Office: Days
• US Class Current: 606/83
• CPC Class Codes: A61B 17/1608 the two jaw elements being linked to two elongated shaft elements moving longitudinally relative to each other
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/2904 curved, but rigid
• CPC Class Codes: A61B 2017/2905 flexible
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2217/005 with suction drainage system

Abstract

Devices and methods for aggressively and continuously cutting and removing anatomical tissue. The device may comprise elongated outer and inner tubes having respective proximal and distal ends. The inner tube is moveably received in the elongated inner. A cutting assembly is rotatably received in the elongated inner tube. The device may also comprise a handle arm attached near the proximal end of the outer tube, and a trigger arm attached near the proximal end of the inner tube. A movable jaw is pivotally attached near the distal end of the outer or inner tube, the movable jaw being urged towards the cutting blade assembly as the trigger arm is actuated.

Claims

1. A tissue cutting tool, comprising:

an elongated outer tube having a proximal end and a distal end;

an elongated inner tube having a proximal end and a distal end, the elongated inner tube being moveably received in the elongated outer tube;

a cutting assembly being received in the elongated inner tube;

a handle arm attached near the proximal end of the outer tube;

a trigger arm attached near the proximal end of the inner tube; and

a movable jaw pivotally attached near the distal end of the outer or inner tube, the movable jaw being urged towards a cutting portion of the cutting blade assembly as the trigger arm is actuated.

2. The cutting tool of claim 1 wherein the movable jaw further comprises teeth formed along its periphery.

3. The cutting tool of claim 1 wherein the movable jaw comprises an aft grabbing movable jaw.

4. The cutting tool of claim 3 wherein the movable jaw is hinged to the inner tube and pivotally attached to the outer tube.

5. The cutting tool of claim 4 wherein the movable jaw is rigidly attached to the outer tube via a pivot pin.

6. The cutting tool of claim 1 wherein the movable jaw comprises a forward grabbing movable jaw.

7. The cutting tool of claim 6 wherein the movable jaw is directly hinged to the outer tube and hinged to the inner tube via a link element.

8. The cutting tool of claim 1 wherein the cutting assembly comprises:

an outer cutting blade having a cutting window near the distal end with teeth formed thereon;

an inner cutting blade rotatably received in the outer cutting blade, the inner cutting blade having a cutting window near the distal end with teeth formed thereon, the teeth of the inner cutting blade cooperating with the teeth of the outer cutting blade as the inner cutting blade is rotated, the inner cutting blade defining a cylindrical wall comprising a suction passage to permit aspiration of cut tissue through the cutting blade; and

power means for rotating the inner cutting blade within the outer cutting blade.

9. The cutting tool of claim 1 wherein the cutting blade assembly comprises:

an outer tubular member;

an inner tubular member rotatably received in the outer tubular member, the inner tubular member having a cutting member disposed at a distal end, the inner tubular member further comprising a suction passage to permit aspiration and removal of cut tissue through the inner tubular member;

aspiration means for aspirating and removing cut tissue through the inner tubular member; and

power means for rotating the inner tubular member and the shaver.

10. An anatomical tissue cutting tool, comprising:

a bent outer tube having a proximal end and a distal end;

a flexible inner tube having a proximal end and a distal end, the elongated inner tube being moveably received in the elongated outer tube;

a cutting blade assembly being received in the flexible inner tube;

a handle arm attached near the proximal end of the outer tube;

a trigger arm attached near the proximal end of the inner tube; and

a movable jaw pivotally attached near the distal end of the outer or inner tube, the movable jaw being urged towards a cutting portion of the cutting blade assembly as the trigger arm is actuated.

11. The cutting tool of claim 10 wherein the movable jaw further comprises teeth formed along its periphery.

12. The cutting tool of claim 10 wherein the movable jaw comprises an aft grabbing jaw.

13. The cutting tool of claim 10 wherein the movable jaw comprises a forward grabbing jaw.

14. The cutting tool of claim 10 wherein the outer tube is rigid.

15. A flexible inner member assembly for being moved in a bent outer member assembly, comprising:

a flexible member defining an inner lumen for receiving a cutting assembly, the flexible member having a jaw or arm member pivotally attached thereto;

a trigger member associated with the bent outer tubular member for actuating the jaw or arm member towards the cutting assembly.

16. The system of claim 15 wherein the flexible member comprises a tubular element containing at least one cut.

17. The system of claim 15 wherein the flexible member comprises a single-piece flexible tube.

18. The system of claim 15 wherein the jaw member comprises an aft-grabbing jaw.

19. The system of claim 15 wherein the jaw member comprises a forward-grabbing jaw.

20. The system of claim 15 wherein the bent outer member is rigid.

21. A tissue cutter, comprising:

a continuous cutting assembly associated with or near a distal end of a cutter handle assembly; and

a mechanical gathering assembly attached to or near the distal end of the cutter assembly.

22. The cutter of claim 21 wherein a proximal end of the cutter assembly is attached or connected to a power source for driving the continuous cutting assembly.

23. The cutter of claim 21 wherein the continuous cutting assembly operates to remove tissue from the cutting assembly.

24. The cutter of claim 21 wherein removal is further accomplished by a suction source attached or connected to or near the proximal end of the cutting assembly.

25. The cutting tool of claim 21 wherein the mechanical gathering assembly is selectively actuated by a trigger assembly to:

(1) grab tissue, particles, debris, or foreign material, (2) cut tissue, particles, debris, or foreign material, or (3) cooperate with the continuous cutting assembly to cut and remove tissue, particles, debris or foreign material.

26. A method for cutting tissue, comprising:

entering an area containing tissue, particles, debris or foreign material with the cutter recited in claim 21;

and

using the cutter to aggressively and continuously cut tissue, particles debris, or foreign material from within the area.

27. The method of claim 26 wherein area containing tissue comprises an intervertebral space.

28. The method of claim 26 wherein the area containing tissue comprises a vertebra.

29. The method of claim 26 further comprising the step of aggressively and continuously removing cut tissue from within the area.

30. The method of claim 29 wherein the cut tissue is removed from the area with the assistance of a suction source connected to the cutter.