Electrosurgery devices

• US 7,819,864 B2
• Filed: 06/05/2009
• Issued: 10/26/2010
• Est. Priority Date: 08/15/2001
• Status: Expired due to Fees

• Current Assignee: Nuortho Surgical Inc.
• Original Assignee: Nuortho Surgical Inc.
• Inventors: Morgan, Roy E., Auge, Wayne K. II
• Primary Examiner(s): Cohen; Lee S
• Application Number:
  US12/479,578
• Publication Number:
  US 20090306645A1
• Time in Patent Office: 508 Days
• Field of Search: 606/32, 606/41, 606/45, 606/49
• US Class Current: 606/32
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma
• CPC Class Codes: A61B 18/06 caused by chemical reaction , e.g. moxaburners
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2018/00434 Neural system
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/1213 creating an arc

Abstract

Devices for electrosurgery by means of oxy-hydro combustion. Deleterious effects to tissue are minimized by means of control of acid-base shift reactions, which reactions can further be employed to control oxy-hydro combustion reactions. In one embodiment, radiofrequency energy in electrical connection with electrodes is employed to induce electrolysis in an aqueous salt environment, thereby producing oxygen and hydrogen, with the same energy source employed to initiate a combustion reaction.

Claims

1. A method of performing an electrosurgical procedure on a patient, the method comprising:

providing a surgical probe including an active electrode and a return electrode separated by an insulator;

activating an aqueous salt ion environment at the location wherein the electrosurgical procedure is to be performed, the environment comprising sufficient volume to permit immersion of at least a portion of the surgical probe including the active electrode and return electrode; and

applying current to a circuit comprising the active electrode and return electrode, the current being less than that required to induce plasma ionization, but sufficient to initiate a hydrogen and oxygen combustion reaction of a portion of the aqueous salt ion environment.

2. The method of claim 1, wherein the active electrode further comprises an alloy that induces release of hydrogen.

3. The method of claim 2, wherein the alloy is a member selected from the group consisting of a magnesium alloy, a rare earth metal, nickel alloy, and a combination thereof.

4. The method of claim 1, wherein the aqueous salt ion environment comprises a salt ion selected from the group consisting of sodium chloride, calcium chloride, magnesium bromide, magnesium iodide, potassium iodide, potassium chloride, lithium bromide and lithium chloride.

5. The method of claim 1, wherein the current applied comprises a high frequency voltage difference.

6. The method of claim 5, wherein the high frequency voltage difference applied comprises radiofrequency (RF) energy.

7. The method of claim 1, wherein the insulator comprises an electrical and thermal insulator.

8. The method of claim 1, wherein the aqueous salt ion environment comprises naturally occurring biological fluids of the patient.

9. The method of claim 1, wherein the aqueous salt ion environment comprises an exogenous aqueous salt ion solution.

10. A method of performing an electrosurgical procedure on a patient, the method comprising:

providing a surgical probe including an active electrode and a return electrode separated by an insulator;

activating an aqueous salt ion environment at the location wherein the electrosurgical procedure is to be performed, the environment comprising sufficient volume to permit immersion of at least the portion of the surgical probe including the active electrode and return electrode; and

applying current to a circuit comprising the active electrode and return electrode, the current being less than that required to induce plasma ionization, but sufficient to induce electrolysis of a portion of the aqueous salt ion environment.

11. The method of claim 10, wherein the active electrode further comprises an alloy that induces release of hydrogen.

12. The method of claim 11, wherein the alloy is a member selected from the group consisting of a magnesium alloy and a rare earth metal and nickel alloy.

13. The method of claim 10, wherein the aqueous salt ion environment comprises a salt ion selected from the group consisting of sodium chloride, calcium chloride, magnesium bromide, magnesium iodide, potassium iodide, potassium chloride, lithium bromide and lithium chloride.

14. The method of claim 10, wherein the current applied comprises a high frequency voltage difference.

15. The method of claim 14, wherein the high frequency voltage difference applied comprises radiofrequency (RF) energy.

16. The method of claim 10, wherein the insulator comprises an electrical and thermal insulator.

17. The method of claim 10, wherein the aqueous salt ion environment comprises naturally occurring biological fluids of the patient.

18. The method of claim 10, wherein the aqueous salt ion environment comprises an exogenous aqueous salt ion solution.