Surgical tool with inductively heated regions

• US 20100268214A1
• 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, Kim, McNally, David
• Granted Patent: US 8,377,052 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

An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to 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 thermally adjustable surgical tool comprising:

an electrical conductor;

a ferromagnetic coating covering at least a portion of the electrical conductor; and

a primary geometry, wherein the conductor is disposed upon the primary geometry.

2. The thermally adjustable surgical tool of claim 1, further comprising oscillating electrical energy delivered to the electrical conductor.

3. The thermally adjustable surgical tool of claim 1, wherein the primary geometry is selected from the group of scalpel, spatula, ball and pointed geometry.

4. The thermally adjustable surgical tool of claim 1, wherein the primary geometry forms a portion of forceps.

5. The thermally adjustable surgical tool of claim 1, wherein the primary geometry further comprises a non-contiguous portion of material between a path formed by the conductor.

6. The thermally adjustable surgical tool of claim 1, wherein the primary geometry further comprises a hole in the primary geometry.

7. The thermally adjustable surgical tool of claim 1, wherein the conductor is embedded in the primary geometry.

16. The thermally adjustable surgical tool of claim 1, further comprising a sensor disposed on the primary geometry for monitoring at least one of the ferromagnetic coating, the conductor and tissue disposed adjacent the tool.

8. A thermally adjustable surgical tool comprising:

a plurality of electrical conductors;

a plurality of ferromagnetic coatings, each covering at least a portion of one of the electrical conductors; and

a primary geometry, wherein one or more of the plurality of electrical conductors are attached to the primary geometry.

9. The thermally adjustable surgical tool of claim 8, wherein at least a portion of the plurality of ferromagnetic coatings are configured to provide different tissue effects.

10. The thermally adjustable surgical tool of claim 9, wherein the different tissue effects are localized to different portions of the primary geometry.

11. The thermally adjustable surgical tool of claim 8, further comprising a power source configured for generating oscillating electrical energy delivered to the plurality of electrical conductors and a user control configured to direct the generator system.

12. The thermally adjustable surgical tool of claim 11, further comprising a primary geometry wherein the plurality of conductors are disposed.

13. The thermally adjustable surgical tool of claim 12, wherein the plurality of conductors are arranged such that one or more of the conductors are associated with a portion of the primary geometry.

14. The thermally adjustable surgical tool of claim 13, wherein the user control is configured to direct the generator system to individually control the portion of the primary geometry by directing the power delivered to the one or more conductors.

15. The thermally adjustable surgical tool of claim 14, wherein the user control is configured to select a desired temperature at a portion of the primary geometry and the generator system is configured to deliver the power correlated with the desired temperature to the one or more conductors.

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

selecting a primary geometry having a conductor disposed thereon, the 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.

18. The method according to claim 17, further comprising the step of choosing a primary geometry selected from the group of scalpel, spatula, ball and pointed geometry

19. The method according to claim 17, further comprising the step of choosing a primary geometry that forms a portion of forceps.

20. The method according to claim 17, wherein the treat the tissue comprises vascular endothelial welding the tissue.

21. The method according to claim 17, wherein the treat the tissue comprises incising the tissue.

22. The method according to claim 17, wherein the treat the tissue comprises causing hemostasis in the tissue.

23. The method according to claim 17, wherein the treat the tissue comprises ablating the tissue.

24. A method for tissue destruction, the method comprising;

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

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

25. The method for tissue destruction of claim 24, further comprising

monitoring the tissue;

and

ceasing or altering delivery of the oscillating electrical signal to the conductor when the desired tissue destruction has occurred or undesired tissue effects are to be prevented.

26. A method for forming a surgical instrument, the method comprising;

selecting a primary geometry;

coating a conductor with ferromagnetic material; and

disposing the conductor on the primary geometry.

27. The method according to claim 26, further comprising the step of providing electrical connections on the conductor configured for receiving oscillating electrical energy.