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1. WO2020117723 - ELECTROSURGICAL ELECTRODES AND SYSTEMS AND METHODS INCLUDING SAME

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED:

1. A method for treating a tissue of a subject, the method comprising:

providing an electrode having a contact surface, optionally wherein the contact surface has a curved profile;

placing the contact surface in contact with tissue of the subject; and sliding the contact surface across and in contact with the tissue while applying electrosurgical currents to the tissue via the contact surface to thereby remove a portion of the tissue from the subject and form a treated area of the tissue.

2. The method of Claim 1 wherein the portion of the tissue removed from the subject comprises one or more epithelial layers.

3. The method of Claim 1 wherein the step of sliding the contact surface across and in contact with the tissue exposes a tissue layer below the portion of the tissue removed from the subject, optionally wherein the tissue layer comprises a layer of connective tissue and/or a dermal layer.

4. The method of Claim 1 wherein the step of sliding the contact surface across and in contact with the tissue comprises vaporizing and ablating the portion of the tissue removed from the subject.

5. The method of Claim 1 wherein the subject is a human.

6. The method of Claim 1 wherein the subject is an animal (e.g., a dog, cat, horse, etc.).

7. The method of Claim 1 wherein the tissue is skin and/or a mucous membrane.

8. The method of Claim 1 wherein the portion of the tissue removed from the subject comprises a skin lesion and/or mucosal lesion.

9. The method of Claim 1 wherein the portion of the tissue removed from the subject comprises a cancerous tissue (e.g., a basal cell carcinoma) or premalignant tissue.

10. The method of Claim 1 wherein:

the contact surface has a curved profile and the curved profile of the contact surface extends along a first axis;

the contact surface has a linear profile along a second axis perpendicular to the first axis; and

the step of sliding the contact surface across and in contact with the tissue includes sliding the contact surface across and in contact with the tissue in a direction substantially parallel to the first axis while applying electrosurgical currents to the tissue via the contact surface to thereby remove the portion of the tissue from the subject and form the treated area of the tissue.

11. The method of Claim 1 wherein the contact surface has a curved profile that has a minimum arc radius of at least 1.5 mm.

12. The method of Claim 1 wherein:

the step of sliding the contact surface across and in contact with the tissue includes sliding the contact surface across and in contact with the tissue in a brushing direction while applying electrosurgical currents to the tissue via the contact surface to thereby remove the portion of the tissue from the subject and form the treated area of the tissue;

an engagement interface between the contact surface and the tissue defines a contact band having a first dimension parallel to the brushing direction and a second dimension perpendicular to the first dimension; and

the second dimension is greater than the first dimension.

13. The method of Claim 12 wherein:

the first dimension is in the range of from about 1 mm to about 3 mm; and the second dimension is in the range of from about 1 mm to about 4 mm.

14. The method of Claim 1 wherein the step of sliding the contact surface across and in contact with the tissue includes ablating the tissue without cutting the tissue.

15. The method of Claim 1 wherein:

the electrode further includes a lateral edge; and

the method further includes scraping residual tissue from the treated area using the lateral edge.

16. The method of Claim 1 further including:

mounting a wiping insert on the electrode; and

wiping residual tissue from the treated area using the wiping insert.

17. The method of Claim 1 wherein:

the electrode includes first and second opposed lateral edges; and the method includes monitoring the first lateral edge to determine a location of the second lateral edge relative to the subject.

18. The method of Claim 1 wherein:

the electrode includes a bottom wall and a top wall overlying the bottom wall; the contact surface is on the bottom wall;

the top wall includes a planar surface overlying the contact surface; and the method includes monitoring the planar surface to determine a depthwise location of the contact surface relative to the tissue.

19. The method of Claim 1 including:

providing an electrode set including a plurality of electrodes having contact surfaces of different widths from one another, optionally wherein each of the electrodes have a curved profile; and

selecting the electrode from the set of electrodes.

20. The method of Claim 1 wherein the tissue is skin tissue.

21. The method of Claim 1 wherein the tissue is gum tissue.

22. The method of Claim 1 including using the electrode to remove tissue to a depth in the range of from about 0.01 mm to about 0.15 mm in the treated area.

23. The method of Claim 1 including using the electrode to remove an epithelium layer of the tissue while leaving an underlying connective tissue layer and/or dermal layer substantially undamaged in the treated area.

24. The method of Claim 21 wherein the method is used to remove gingiva hyperplasia from the subject’s gums.

25. The method of Claim 21 wherein the method is used to remove racial pigmentation from the subject’s gums.

26. A method for performing electrosurgery on tissue of a subject, the method comprising:

providing an electrosurgical apparatus including:

an electrode including a contact surface and a socket defined in the electrode; and

a wiping insert removably mounted in the socket;

contacting the contact surface with the tissue while applying electrosurgical currents to the tissue via the contact surface to thereby electrosurgically treat the tissue; and thereafter

wiping the tissue using the wiping insert in the socket.

27. A method of removing one or more epithelial layers from a tissue of a subject, the method comprising:

providing an electrode having a contact surface, optionally wherein the contact surface has a curved profile;

placing the contact surface in contact with a first epithelial layer of the tissue of the subject; and

sliding the contact surface across and in contact with the first epithelial layer while applying electrosurgical currents to the first epithelial layer via the contact surface to thereby remove the one or more epithelial layers from the tissue of the subject.

28. The method of Claim 27 wherein, responsive to the step of sliding the contact surface across and in contact with the first epithelial layer while applying electrosurgical currents to the first epithelial layer via the contact surface, a tissue layer is exposed that was below the first epithelial layer, optionally wherein the tissue layer comprises a layer of connective tissue and/or a dermal layer.

29. The method of Claim 28 further comprising isolating the tissue layer from the subject to thereby provide an isolated tissue layer.

30. The method of Claim 29 wherein the isolated tissue layer comprises acellular dermis and/or is used to prepare acellular dermis.

31. The method of Claim 27 wherein the step of sliding the contact surface across and in contact with the first epithelial layer comprises vaporizing and ablating the one or more epithelial layers.

32. The method of Claim 27 wherein the subject is a human.

33. The method of Claim 27 wherein the subject is an animal (e.g., a dog, cat, horse, etc.).

34. The method of Claim 27 wherein the tissue is skin and/or a mucous membrane.

35. The method of Claim 27 wherein the one or more epithelial layers removed from the subject comprise a skin lesion and/or mucosal lesion.

36. The method of Claim 27 wherein the one or more epithelial layers removed from the subject comprise a cancerous tissue (e.g., a basal cell carcinoma) or premalignant tissue.

37. The method of Claim 27 wherein:

the contact surface has a curved profile and the curved profile of the contact surface extends along a first axis;

the contact surface has a linear profile along a second axis perpendicular to the first axis; and

the step of sliding the contact surface across and in contact with the first epithelial layer includes sliding the contact surface across and in contact with the first epithelial layer in a direction substantially parallel to the first axis while applying electrosurgical currents to the first epithelial layer via the contact surface to thereby remove the one or more epithelial layers.

38. The method of Claim 27 wherein the contact surface has a curved profile that has a minimum arc radius of at least 1.5 mm.

39. The method of Claim 27 wherein:

the step of sliding the contact surface across and in contact with the first epithelial layer includes sliding the contact surface across and in contact with the first epithelial layer in a brushing direction while applying electrosurgical currents to the first epithelial layer via the contact surface to thereby remove the one or more epithelial layers;

an engagement interface between the contact surface and the first epithelial layer defines a contact band having a first dimension parallel to the brushing direction and a second dimension perpendicular to the first dimension; and

the second dimension is greater than the first dimension.

40. The method of Claim 29 wherein:

the first dimension is in the range of from about 1 mm to about 3 mm; and the second dimension is in the range of from about 1 mm to about 4 mm.

41. The method of Claim 27 wherein the step of sliding the contact surface across and in contact with the first epithelial layer includes ablating the one or more epithelial layers without cutting the one or more epithelial layers.

42. The method of Claim 28 wherein:

the electrode further includes a lateral edge; and

the method further includes scraping residual tissue from the tissue layer using the lateral edge.

43. The method of Claim 28 further including:

mounting a wiping insert on the electrode; and

wiping residual tissue from the tissue layer using the wiping insert.

44. The method of Claim 27 wherein:

the electrode includes first and second opposed lateral edges; and the method includes monitoring the first lateral edge to determine a location of the second lateral edge relative to the subject.

45. The method of Claim 27 wherein:

the electrode includes a bottom wall and a top wall overlying the bottom wall; the contact surface is on the bottom wall;

the top wall includes a planar surface overlying the contact surface; and the method includes monitoring the planar surface to determine a depthwise location of the contact surface relative to the first epithelial layer.

47. The method of Claim 27 including:

providing an electrode set including a plurality of electrodes having contact surfaces of different widths from one another, optionally wherein each of the electrodes have a curved profile; and

selecting the electrode from the set of electrodes.

48. The method of Claim 27 wherein the tissue is skin tissue.

49. The method of Claim 27 wherein the tissue is gum tissue.

50. The method of Claim 27 wherein the method removes tissue to a depth in the range of from about 0.01 mm to about 0.15 mm.

51. The method of Claim 49 including using the electrode to ablate an epithelium layer of the gum tissue while leaving an underlying connective tissue layer substantially undamaged.

52. The method of Claim 49 wherein the method is used to remove gingiva hyperplasia from the subject’s gums.

53. The method of Claim 27 wherein the method is used to remove areas of hyperpigmentation from the subject’s tissue.

54. The method of Claim 27 wherein the method is used to remove areas of hypopigmentation from the subject’s tissue.

55. The method of Claim 27 wherein the method is used to remove epidermis from the subject’s tissue.

56. The method of Claim 27 further comprising placing the contact surface in contact with a second epithelial layer of the tissue of the subject; and

sliding the contact surface across and in contact with the second epithelial layer while applying electrosurgical currents to the second epithelial layer via the contact surface to thereby remove at least one additional epithelial layer from the tissue of the subject.