Method and apparatus for providing enhanced tissue fragmentation and/or hemostasis

• US 4,931,047 A
• Filed: 09/30/1987
• Issued: 06/05/1990
• Est. Priority Date: 09/30/1987
• Status: Expired due to Term

• Current Assignee: Integra Lifesciences Corporation (Integra LifeSciences Holdings Corporation)
• Original Assignee: Cavitron Corporation
• Inventors: Logan, Joseph N., Vassallo, Charles, Broadwin, Alan, Hornlein, Robert W.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/103,022
• Time in Patent Office: 979 Days
• Field of Search: 604/22, 604/35, 128/24 A, 128/303 R, 128/303.14, 128/303.17, 128/305, 606/42, 606/45, 606/48, 606/49, 606/50, 606/169-171
• US Class Current: 604/22
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2017/320069 for ablating tissue
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61B 2018/00011 with fluids
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/00958 for switching between different working modes of the main function
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: H01H 2300/014 Application surgical instrument

Abstract

An apparatus having a vibratable tip for ultrasonically disintegrating tissue in a surgical procedure and for aspirating the disintegrated tissue and fluids away from the surgical site through an opening in the tip. A connection to an electrosurgical unit provides for delivery of RF cutting current, RF coagulating current or a blend thereof to the tip so that electrosurgical procedures can be conducted separately or simultaneously with ultrasonic aspiration through the tip. It thus is now possible, for example, to electrocauterize simultaneously with ultrasonic fragmentation with a single handheld surgical device. The simultaneous delivery of ultrasonic vibrations and RF current to the tip also has been found to increase the tissue fragmentation rate.

Claims

1. A surgical apparatus for performing one or more surgical procedures at a surgical site on a patient comprising:

a handpiece,

a tool supported by said handpiece,

said tool having a vibratable tool tip,

an RF current means selectively operable for providing an RF current to said tool tip for allowing performance of an electrosurgical procedure at the surgical site,

a vibrating means for ultrasonically vibrating said tool tip,

said tool tip having a top opening,

said tool having a tool passageway therethrough communicating with said tip opening, and

an aspirating means for applying a suction pressure on said tool passageway for aspirating tissue particles and fluid at the surgical site through said tip opening through said tool passageway and away from the surgical site,

said RF current means including a switching means for switching the RF current provided to said tool tip to at least an RF cutting current during ultrasonic vibration.

2. The apparatus of claim 1 including,

said switching means being on said handpiece.

3. The apparatus of claim 2 including,

said switching means being secured to and supported by said handpiece.

4. The apparatus of claim 3 including,

said switching means being built into said handpiece.

5. The apparatus of claim 2 including,

said switching means comprising a footswitch adapted to be operated by a foot of the operator of said handpiece.

6. The apparatus of claim 1 including,

said switching means comprising a manifold secured to said handpiece and a switch assembly connected to said manifold and movable therewith when securing said manifold to or removing said manifold from said handpiece.

7. The apparatus of claim 6 including,

said switch assembly being integrally formed with said manifold.

8. The apparatus of claim 1 including,

said switching means comprising a nosecone securable onto said handpiece, a switch secured to said nosecone, and a cable means for operatively connecting said switch to an electrosurgical unit.

9. The apparatus of claim 8 including,

said switching means including a securing means for securing said nosecone to said handpiece.

10. The apparatus of claim 1 including,

said switching means comprising a push button switch assembly at said handpiece.

11. The apparatus of claim 1 including,

said switching means comprising a rocker-type switch assembly at said handpiece.

12. The apparatus of claim 1 including,

said switching means comprising a slide-type switch assembly at said handpiece.

13. The apparatus of claim 1 including,

said switching means comprising a single pole double throw switch which is normally open.

14. The apparatus of claim 1 including,

said RF current being 500 KHz.

15. The apparatus of claim 1 including,

said RF cutting current being 500 KHz.

16. The apparatus of claim 1 including,

a connecting means for operatively connecting said handpiece to an electrosurgical unit which generates the RF current.

17. The apparatus of claim 16 including,

said connecting means including a selecting means for selecting between cutting and coagulating modes of the RF current to be delivered to said tip.

18. The apparatus of claim 1 including,

an irrigating means associated with said handpiece for providing irrigating fluid to the surgical site adjacent said tip.

19. The apparatus of claim 18 including,

said irrigating means including an irrigating fluid passageway at least a part of which is supported by said handpiece, and said passageway having a passageway exit port adjacent to said tip.

20. The apparatus of claim 1 including,

said RF current means including an electrosurgical unit for generating RF energy.

21. The apparatus of claim 20 including,

said electrosurgical unit being a stand-free unit and said RF current means including a cable electrically connecting said stand-free electrosurgical unit to said handpiece.

22. The apparatus of claim 1 including,

said RF current means including an acoustic vibrator component supported by said handpiece and operatively connectable to a source of RF energy.

23. The apparatus of claim 22 including,

a mechanical connecting means for operatively connecting said acoustic vibrator component to said tip.

24. The apparatus of claim 22 including,

a conducting fluid connecting means for operatively connecting said acoustic vibrator component to said tip.

25. The apparatus of claim 24 including,

said conducting fluid connecting means using a surgical site irrigating fluid for conducting the RF energy to said tip.

26. The apparatus of claim 1 including,

said RF current means including a generating means for generating the RF current,

said aspirating means including a suction means for generating the suction pressure, and

a housing means for housing together said generating means and said suction means.

27. The apparatus of claim 1 including,

said RF current means is operable for delivering RF current to said tool tip in an electorsurgical procedure on tissue at the surgical site while said vibrating means is ultrasonically fragmenting tissue at the surgical site.

28. The apparatus of claim 1 including,

said RF current means is operable for delivering to deliver RF current to said tool tip in an electrosurgical procedure on tissue at the surgical site while said aspirating means is aspirating tissue particles and fluid through said tip opening away from the surgical site.

29. The apparatus of claim 1 including,

said RF current means including a coupling means for electrically coupling said tool tip with an electrosurgical unit.

30. The apparatus of claim 29 including,

said RF current means including an electrical filtering means for preventing malfunctioning of the logic controls of said apparatus when said coupling means is coupling said tool tip with the electrosurgical unit and the electrosurgical unit is being activated.

31. The apparatus of claim 1 wherein:

said switching means is selectively operable to switch said RF current means to supply an RF cauterizing current.

32. The apparatus of claim 31 wherein:

said switching means is selectively operable to provide a simultaneous blend of RF cutting and RF coagulating currents.

33. The apparatus of claim 32 wherein:

said switching means is selectively operable to control said RF current to an inoperative condition independent of operation of said vibrating means.

34. The apparatus of claim 31 wherein:

said switching means uses a saline type solution for connecting RF current to said tool.

35. The apparatus of claim 1 wherein:

said switching means is selectively operable to control said RF current means to an inoperative condition independent of operation of said vibrating means.

43. The method of claim 33 including,

applying an RF coagulating current to the tip during said applying an RF cutting current step and delivering the blend current thereby produced to tissue at the surgical site.

36. A method for conducting enhanced cutting at a surgical site on a patient comprising:

applying at least an RF cutting current to an operative tip of an ultrasonic surgical aspirating instrument,

ultrasonically vibrating the operative tip,

positioning the tip at the surgical site, and

thereafter, positioning the tip at the surgical site as needed as the RF cutting current is delivered by the tip to the surgical site.

37. The method of claim 36 including,

said applying step being before said positioning step.

38. The method of claim 36 including,

said positioning step being before said applying step.

39. The method of claim 36 including,

contacting a dispersive electrode to the patient to form part of an electrical loop with a source of the RF cutting current.

40. The method of claim 36 including,

performing ultrasonic fragmentation on tissue at the surgical site with the tip of the instrument.

41. The method of claim 40 including,

said performing step being while the RF current is being delivered through the tip to the surgical site.

42. The method of claim 36 including,

with the tip being positioned at the surgical site,

switching the instrument between an RF coagulating mode thereof and an RF cutting mode thereof.

44. The method of claim 36 including,

delivering via the tip the RF coagulating current in a dessication procedure for deep coagulation drying out of large volumes of tissue.

45. The method of claim 36 including,

delivering via the tip the RF coagulating current in a fulguration procedure for spray coagulation for drying out the surface of tissue.

46. The method of claim 36 including,

supplying an irrigating fluid to the surgical site generally adjacent to said tip via fluid conduit supported by a handpiece.

47. A method for electrosurgically cutting tissue at a surgical site on a patient comprising:

applying an RF cutting or an RF coagulating current to an operative tip of an ultrasonic aspirating instrument,

ultrasonically vibrating the tip,

thereafter, positioning the tip at the site as needed, as the RF cutting current is delivered to the surgical site to perform the tissue cutting procedure,

with the tip being positioned generally at the surgical site, switching the instrument between an RF coagulating mode thereof and an RF cutting mode thereof.

48. The method of claim 47 including,

said applying step being before said positioning step.

49. The method of claim 47 including,

said positioning step being before said applying step.

50. The method of claim 47 including,

performing ultrasonic fragmentation on tissue at the surgical site with the tip of the instrument.

51. The method of claim 50 including,

said performing step being while the RF cutting current is being delivered through the tip to the surgical site.

52. The method of claim 47 including,

affixing a dispersive electrode to the patient to form part of an electrical loop with a source of the RF cutting current.

53. The method of claim 47 including,

while delivering the RF cutting current to the surgical site, aspirating tissue particles and fluid through an opening in the tip and away from the surgical site.

54. The method of claim 47 including,

supplying an irrigating fluid to the surgical site generally adjacent to the tip via a fluid conduit supported by a handpiece.