METHOD FOR INDUCTIVELY HEATING A SURGICAL IMPLEMENT

• US 20100268212A1
• Filed: 12/24/2009
• Published: 10/21/2010
• Est. Priority Date: 04/17/2009
• Status: Active Grant

• Current Assignee: Domain Surgical, Inc (OmniGuide Holdings, Inc.)
• Original Assignee: Domain Surgical, Inc (OmniGuide Holdings, Inc.)
• Inventors: Manwaring, Loraine, McNaily, David, Manwaring, Mark, Manwaring, Kim
• Granted Patent: US 8,523,850 B2
• Time in Patent Office: Days
• US Class Current: 606/31
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 17/3211 Surgical scalpels, knives; Accessories therefor
• CPC Class Codes: A61B 18/04 by heating by applying electromagnetic radiation A61B18/18; hyperthermia using electric or magnetic fields, radiation or ultrasound A61N
• CPC Class Codes: A61B 18/08 by means of electrically-heated probes
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 18/085 Forceps, scissors
• CPC Class Codes: A61B 18/10 Power sources therefor
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/00141 continuous, e.g. wave
• CPC Class Codes: A61B 2017/00876 magnetic
• 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 2017/320082 for incising tissue
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00095 high, i.e. heat conducting
• CPC Class Codes: A61B 2018/00107 Coatings on the energy applicator
• CPC Class Codes: A61B 2018/0013 non-sticking
• CPC Class Codes: A61B 2018/00577 : Ablation
• CPC Class Codes: A61B 2018/00589 : Coagulation
• CPC Class Codes: A61B 2018/00595 : Cauterization
• CPC Class Codes: A61B 2018/00601 : Cutting
• CPC Class Codes: A61B 2018/00619 : Welding
• CPC Class Codes: A61B 2018/00642 : with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00654 : with individual control of each of a plurality of energy emitting elements
• CPC Class Codes: A61B 2018/00702 : Power or energy
• CPC Class Codes: A61B 2018/00714 : Temperature
• CPC Class Codes: A61B 2018/00755 : Resistance or impedance
• CPC Class Codes: A61B 2018/00791 : Temperature
• CPC Class Codes: A61B 2018/00803 : with temperature prediction
• CPC Class Codes: A61B 2018/00958 : for switching between different working modes of the main function
• CPC Class Codes: A61B 2018/128 : generating two or more frequencies
• CPC Class Codes: A61B 2018/1407 : Loop
• CPC Class Codes: A61B 2018/1412 : Blade
• CPC Class Codes: A61M 25/00 : Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 25/0082 : Catheter tip comprising a tool
• CPC Class Codes: Y10T 29/49124 : On flat or curved insulated base, e.g., printed circuit, etc.

Abstract

A power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Claims

1. A process of delivering power to a thermally adjustable surgical tool comprising:

selecting a surgical tool comprising a conductor configured such that an oscillating electrical signal will have approximately a standing wave with maximum current and minimum voltage at a load, the load consisting of a ferromagnetic material coated on the conductor;

delivering the oscillating electrical signal to the load; and

causing the electrical signal to no longer be sent to the load.

2. The process according to claim 1, wherein the process comprises providing an oscillating electrical signal between the frequencies of 5 megahertz and 24 gigahertz.

3. The process according to claim 2, wherein the oscillating electrical signal is between the frequencies of 40 megahertz and 928 megahertz.

4. The process according to claim 1, wherein the process comprises providing an oscillating electrical signal selected from the group of center frequencies of 6.78 MHz, 13.56 MHz, 27.12 MHz, 40.68 MHz, 433.92 MHz, 915 MHz, 2.45 GHz, 5.80 GHz, 24.125 GHz, 61.25 GHz, 122.5 GHz, 245 GHz.

5. A method for incising tissue, the method comprising;

selecting a conductor having a ferromagnetic coating disposed on a portion thereof;

disposing the ferromagnetic coating into contact with the tissue; and

delivering an oscillating electrical signal to the conductor so as to heat the ferromagnetic coating and cut the tissue.

6. The method according to claim 5, further comprising the step of selecting a power output of the oscillating electrical signal.

7. The method according to claim 6, wherein the power output corresponds to a temperature range at the ferromagnetic coating.

8. The method according to claim 7, wherein the temperature range is selected from the group corresponding to a desired tissue effect of cutting, hemostasis, vascular endothelial welding, tissue vaporization, tissue ablation and tissue carbonization.

9. The method according to claim 6, wherein the power output corresponds to a desired tissue effect.

10. A method for incising tissue, the method comprising;

selecting a conductor having a ferromagnetic coating disposed on a portion thereof, which is associated with a plug;

placing the plug into a receptacle configured for power delivery;

disposing the ferromagnetic coating into contact with the tissue; and

delivering an oscillating electrical signal to the conductor through the plug so as to heat the ferromagnetic coating and incise the tissue;

11. The method of claim 10, further comprising removing the plug after use.

12. The method of claim 10, further comprising the step of communicating characteristics of the conductor and ferromagnetic coating through the receptical.

13. The method of claim 12, wherein the communicating step further comprises the step of accessing a computer chip through or within the plug.

14. The method of claim 12, wherein the communicating step further comprises the step of communicating a resistor value corresponding to characteristics in a lookup table.

15. A method for performing surgery, the method comprising:

selecting a load comprising a conductor with a ferromagnetic coating;

delivering power to the conductor through oscillating electrical energy from a power source; and

matching an impedance of the load to an impedance of the generator.

16. The method of claim 15, wherein the matching step further comprises changing the output impedance of the power source to match the load.

17. The method of claim 15, wherein the matching step further comprises altering the frequency of the oscillating electrical energy.

18. The method of claim 15, wherein the matching step further comprises adjusting the power source to achieve a standing wave in the oscillating electrical energy.

19. The method of claim 15, wherein the matching step further comprises maximizing current at the conductor.

20. The method of claim 15, wherein the matching step further comprises choosing components to achieve a standing wave at the conductor.

21. The method of claim 15, wherein the matching step further comprises selecting a length of cable to connect the power source to the electrical conductor to achieve a standing wave at the conductor.

22. A method for treating tissue, the method comprising;

selecting a conductor having a ferromagnetic coating disposed on a portion thereof;

disposing the ferromagnetic coating into contact with the tissue; and

delivering an oscillating electrical signal to the conductor so as to heat the ferromagnetic coating and treat the tissue;

adjusting a user control to alter the electrical signal to obtain or maintain a desired heating of the ferromagnetic coating.

23. A method for cutting comprising:

selecting a conductor, a portion of the conductor having a ferromagnetic coating disposed thereon;

delivering an oscillating electrical signal to the conductor to cause hysteresis in the ferromagnetic coating and thereby heat the ferromagnetic coating; and

applying the heated coating to a substance to be cut to thereby cut the substance.