Apparatus and method for morselating and removing tissue from a patient

• US 6,007,512 A
• Filed: 09/05/1997
• Issued: 12/28/1999
• Est. Priority Date: 02/10/1995
• Status: Expired due to Term

• Current Assignee: Atricure, Inc.
• Original Assignee: Enable Medical Corporation (Atricure, Inc.)
• Inventors: Hooven, Michael D.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Sadula, Jennifer R.
• Application Number:
  US08/924,806
• Time in Patent Office: 844 Days
• Field of Search: 606/45-48, 606/50, 606/127-128, 606/167, 606/180, 604/19-22, 604/267, 604/280, 128/772
• US Class Current: 604/22
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 18/1487 Trocar-like, i.e. devices producing an enlarged transcutaneous opening
• CPC Class Codes: A61B 2017/00287 Bags for minimally invasive surgery
• CPC Class Codes: A61B 2017/320024 Morcellators, e.g. having a hollow cutting tube with an annular cutter for morcellating and removing tissue
• CPC Class Codes: A61B 2017/32004 having a laterally movable cutting member at its most distal end which remains within the contours of said end
• CPC Class Codes: A61B 2017/320775 Morcellators, impeller or propeller like means
• CPC Class Codes: A61B 2018/00208 actively driven, e.g. by a motor
• CPC Class Codes: A61B 2018/1253 monopolar
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/162 located on the probe body
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2218/007 Aspiration

Abstract

A method for morselating and removing the morselated tissue through a small incision comprising in general inserting a tissue container into the body cavity of a patient through an incision, placing resected tissue in the vessel, inserting a morselator having a rotatable electrode thereon through the incision and into the vessel, morselating the tissue and removing the tissue from the containment vessel and the body. An apparatus for morselating and removing tissue through a small incision within the body cavity of a patient is also disclosed and may comprise a tissue container having an inner chamber for containing resected tissue, and a morselator having a proximal end and a distal end carrying an electrode wherein the distal end is insertable into the body cavity and containment vessel for morselating resected tissue.

Claims

1. An apparatus for morselating tissue within a body cavity of a patient comprising:

an elongated shaft comprising an stationary outer tube, an inner carrier rotatably disposed within said outer tube said outer tube and inner carrier being rotatable with respect to each other, a proximal end portion, and a distal end portion, said outer tube having an opening at its distal end; and

first electrode surface carried by said movable inner carrier and being movable with said carrier.

2. The apparatus of claim 1 further comprising a second electrode surface carried by said elongated shaft at said distal end portion wherein said first and second electrode surfaces define electrodes of opposite polarity for transmission of energy and morselation of tissue therebetween.

3. The apparatus of claim 2 wherein said first and said second electrode surfaces are carried on said inner carrier.

4. The apparatus of claim 3 wherein said first and second electrode surfaces comprise wires disposed on opposite sides of said inner carrier.

5. The apparatus of claim 2 further comprising a pair of electrical conductors carried by said inner carrier, each conductor extending between one of said electrode surfaces and the proximal end portion of said inner carrier.

6. The apparatus of claim 5 wherein said conductors are in the form of relatively thin and wide strips carried on the outer surface of said inner carrier.

7. The apparatus of claim 6 wherein the outer tube has a non-conductive inner surface.

8. The apparatus of claim 2 wherein said first electrode surface is connected to an output terminal of a first polarity of a bipolar RF generator and said second electrode surface is connected to an output terminal of a second, opposite polarity of a bipolar RF generator.

9. The apparatus of claim 2 wherein first electrode surface comprises a wire.

10. The apparatus of claim 9 wherein said first and second electrode surfaces extend beyond the distal end of said outer tube.

11. The apparatus of claim 9 wherein said first and second electrode surfaces are flush with the distal end of said outer tube.

12. The apparatus of claim 1 further comprising an electrical conductor extending between said first electrode surface and said proximal end portion of said inner carrier on which it is carried.

13. The apparatus of claim 12 wherein said electrical conductor comprises a relatively wide and thin strip of conductive material.

14. The apparatus of claim 12 in which said inner carrier on which said first electrode is carried comprises a wall defined by inner and outer layers of non-conductive material, and said conductor is located therebetween.

15. The apparatus of claim 1 wherein the inner carrier and outer tube are relatively axially movable.

16. The apparatus of claim 1, further comprising a hand piece located at the proximal end of said shaft.

17. The apparatus of claim 1 further comprising a hand piece, a motor disposed within said hand piece operable to rotate said rotatable inner carrier, and a power supply disposed in said hand piece and operatively connected to said motor.

18. The apparatus of claim 1 further comprising a second electrode surface carried by said outer tube, said first electrode surface being connectable to a selected one of a monopolar active or return terminal of an RF generator and said second electrode surface being connectable to a selected other of the monopolar active or return terminal of an RF generator.

19. The apparatus of claim 1 wherein said first electrode surface extends from the distal end of said inner carrier to form a loop.

20. The apparatus of claim 1 wherein said first electrode surface comprises a wire.

21. The apparatus of claim 1 wherein said inner carrier and outer tube include alignable side ports at their distal ends, said first electrode surface extending along the side port on said inner carrier, and a second electrode surface carried by said outer tube adjacent the side port in said outer tube.

22. The apparatus of claim 1 wherein said opening at said distal end of said outer tube comprises a side port.