Apparatus and method for morselating and removing tissue from a patient

• US 5,814,044 A
• Filed: 02/10/1995
• Issued: 09/29/1998
• 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): Buiz, Michael Powell
• Assistant Examiner(s): SMITH, CHALIN A
• Application Number:
  US08/386,970
• Time in Patent Office: 1,327 Days
• Field of Search: 606/180, 606/167, 606/45-48, 606/50, 606/127-128, 604/19-22, 604/264, 604/280, 128/772
• US Class Current: 606/48
• 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. Apparatus for morselating tissue within a body cavity of a patient comprising:

an elongated shaft comprising an outer tube, an inner tube disposed within said outer tube, a proximal end portion, and a distal end portion, said inner and outer tubes being open at their distal ends;

said inner and outer tubes being rotatable with respect to each other; and

electrode surface carried by a rotatable one of said tubes in proximity to the distal end of said tube and being rotatable therewith.

2. The apparatus of claim 1 wherein at least the surface of said inner and outer tubes is comprised of non-conductive material.

3. The apparatus of claim 1 wherein the inner and outer tubes are relatively axially movable.

4. The apparatus of claim 1 further comprising an electrical conductor extending between said at least one electrode surface and said proximal end portion of the tube on which it is carried.

5. The apparatus of claim 4 wherein said electrical conductor comprises a relatively wide and thin strip of conductive material.

6. The apparatus of claim 4 in which the tube on which said electrode is carried comprises a wall defined by inner and outer layers of non-conductive material, and said conductor is located therebetween.

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

8. The apparatus of claim 7 further comprising a motor disposed within said hand piece and operable to rotate said rotatable tube or tubes, and said apparatus further comprising a power supply disposed in said hand piece and operatively connected to said motor.

9. The apparatus of claim 8 wherein said elongated shaft is removable from said hand piece.

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

11. The apparatus of claim 10 further comprising a radio frequency power source having a monopolar active terminal and a return terminal, and said at least one electrode surface is in electrical communication with one of said terminals and the said additional electrode surface is in electrical communication with the other of said terminals.

12. The apparatus of claim 10 wherein said additional electrode surface is carried on said outer tube.

13. The apparatus of claim 12 wherein said outer tube comprises a wall including non-conductive inner and outer surfaces and an electrical conductor therebetween extending between said additional electrode surface and the proximal end portion of said outer tube.

14. The apparatus of claim 10 wherein said one and said additional electrode surfaces are carried on said inner tube.

15. The apparatus of claim 14 further comprising a pair of electrical conductors carried by said inner tube, each conductor extending between one of said electrode surfaces and the proximal end portion of said inner tube.

16. The apparatus of claim 15 wherein said conductors are in the form of relatively thin and wide strips carried on the outer surface of said inner tube.

17. The apparatus of claim 16 wherein the outer tube has a non-conductive inner surface.

18. Apparatus for morselating tissue within a body cavity of a patient comprising:

an elongated shaft comprising inner and outer tubes rotatable with respect to each other, said shaft having proximal and distal end portions and defined by a wall;

a pair of spaced-apart electrode surfaces carried at the distal end of said shaft; and

a pair of electrical conductors extending between one of said electrode surfaces and the proximal end of said shaft.

19. The apparatus of claim 18 further comprising a drive unit carried at the proximal end of said tube and including a motor selectively operable to rotate said tube and a pair of connectors in electrical communication with said conductors being connectable to a radio frequency power supply.

20. The apparatus of claim 18 wherein said wall comprises non-conductive inner and outer surfaces on said outer and inner tubes, respectively, and said pair of electrical conductors are located between said non-conductive surfaces.