LAYERED FERROMAGNETIC COATED CONDUCTOR THERMAL SURGICAL TOOL

• US 20160030103A1
• Filed: 07/21/2015
• Published: 02/04/2016
• 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, Eggers, Philip, Stringham, Mark, Hammond, Paul, McNally, David J.
• Granted Patent: US 10,149,712 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 18/10 Power sources therefor
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2018/00107 Coatings on the energy applicator
• CPC Class Codes: A61B 2018/00148 with metal
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/1407 Loop
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1417 Ball
• CPC Class Codes: C23C 28/02 only coatings only including layers of metallic material

Abstract

A thermal surgical tool comprising a conductor having a ferromagnetic material attached thereto is provided. The conductor may include a support of sufficiently high Young'"'"'s modulus to resist bending when the surgical tool is being used to treat tissue. One or more intervening layers may be disposed between the support and the ferromagnetic material. Each of the intervening layers may be selected for a property that facilitates construction of the surgical tool and/or enhances a functionality of the surgical tool. The thermal surgical tool can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Claims

1-16. -16. (canceled)

17. A method for manufacturing a thermal surgical tool comprising:

forming an electrical conductor by selecting a support and attaching at least one intervening layer to the support; and

attaching a ferromagnetic material to the electric conductor;

wherein the at least one intervening layer is disposed between the support and the ferromagnetic coating.

18. The method according to claim 17, further comprising providing the electrical conductor with connection sites for connecting the electrical conductor to a power source independent of the ferromagnetic material.

19. The method according to claim 17, further comprising disposing an exterior layer over the ferromagnetic material and at least a portion of the electrical conductor.

22. The method according to claim 17, wherein the method further comprises providing a power source connected to the electrical conductor for supplying oscillating electrical current to the electrical conductor.

23. The method according to claim 17, wherein at least one of the at least one intervening layer is conductive and the method comprises disposing at least one of the at least one intervening layer such that a majority of the oscillating electrical current passes through the at least one intervening layer.

24. The method according to claim 17, wherein the method comprises disposing a second intervening layer between the support and the at least one intervening layer, wherein the second intervening layer comprises a strike layer that extends substantially the full length of the support.

25. The method according to claim 17, wherein the support is hollow.

26. The method according to claim 25, wherein the support has a coefficient of thermal expansion which is less than a coefficient of thermal expansion of the layer of ferromagnetic material, and a coefficient of thermal expansion of the at least one intervening layer is greater than the coefficient of thermal expansion of the support and less than the coefficient of thermal expansion of the ferromagnetic layer.

27. The method according to claim 17, wherein the ferromagnetic material extends a length along the support, the length of the ferromagnetic material being less than about 90 percent of the length of the support.

28. The method according to claim 17, wherein the support has a first end and a second end, and the method comprises disposing a first sleeve on the first end and disposing a second sleeve disposed on the second end, the first sleeve and second sleeve being in electrical communication with the at least one intervening layer.

29. The method according to claim 17, wherein the support has a sufficiently high Young'"'"'s modulus to resist bending under the tool'"'"'s standard operating conditions.

30. The method according to claim 17, wherein the support has a Young'"'"'s modulus in excess of 17 psi.

20. A method of treating tissue comprising:

selecting a thermal surgical tool comprising a conductor having a ferromagnetic material disposed thereon, wherein the conductor is connectable to an electric power source independent of the ferromagnetic material;

disposing the ferromagnetic material adjacent to a tissue;

treating the tissue by directing oscillating electrical energy through the conductor to cause the ferromagnetic material to inductively heat;

wherein the conductor comprises a support having at least one intervening layer, and wherein the at least one intervening layer is disposed between the support and the ferromagnetic material.

21. A surgical tool comprising:

a conductor having a hollow portion extending therethrough; and

a ferromagnetic material coated on a portion of the conductor such that passing an oscillating electrical current through the conductor heats the ferromagnetic material.