Method of destroying tissue cells by eletroporation

• US 8,251,986 B2
• Filed: 07/10/2009
• Issued: 08/28/2012
• Est. Priority Date: 08/17/2000
• Status: Active Grant

• Current Assignee: AngioDynamics, Inc.
• Original Assignee: AngioDynamics, Inc.
• Inventors: Chornenky, Victor I., Jaafar, Ali
• Primary Examiner(s): Peffley, Michael
• Assistant Examiner(s): VAHDAT, KHADIJEH A
• Application Number:
  US12/501,225
• Publication Number:
  US 20110009860A1
• Time in Patent Office: 1,145 Days
• Field of Search: 606 20- 41, 606/42, 607/2, 607/3, 607/72, 607/101, 607/102, 607/115, 607/116, 604 20- 22, 435/461, 435/173.6, 435/285.2
• US Class Current: 606/32
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 2018/0016 Energy applicators arranged in a two- or three dimensional array
• CPC Class Codes: A61B 2018/00452 Skin
• CPC Class Codes: A61B 2018/0047 Upper parts of the skin, e.g. skin peeling or treatment of wrinkles
• CPC Class Codes: A61B 2018/00613 Irreversible electroporation reversible electroporation A61N1/327
• CPC Class Codes: A61B 2018/1425 Needle
• CPC Class Codes: A61B 2018/143 multiple needles
• CPC Class Codes: A61N 1/0412 Specially adapted for transcutaneous electroporation, e.g. including drug reservoirs

Abstract

An apparatus and method for performing non-invasive treatment of the human face and body by electroporation in lieu of cosmetic surgery is provided. The apparatus comprises a high voltage pulse generator and an applicator having two or more electrodes in close mechanical and electrical contact with the patient'"'"'s skin for applying the pulses to the patient'"'"'s skin. The applicator may consist of two pieces with one electrode having a sharp tip and another having a flat surface. High voltage pulses delivered to the electrodes create at the tip of the sharp electrode an electric field high enough to cause death of relatively large subcutaneous fat cells by electroporation. Moving the electrode tip along the skin creates a line of necrotic subcutaneous fat cells, which later are metabolized by the body. Multiple applications of the electrode along predetermined lines on the face or neck create shrinkage of the skin and the subcutaneous fat volume underlying the treated area.

Claims

1. A method of treating a living human body by destroying tissue cells, comprising:

positioning one or more electrodes near a target area containing tissue cells to be killed in the living human body; and

treating the living human body by applying electrical pulses through the positioned one or more electrodes in an amount above an upper limit of electroporation to irreversibly open pores in membranes of the tissue cells in the target area, thereby killing the tissue cells in the target area.

2. The method according to claim 1, wherein:

the step of applying electrical pulses includes applying the electrical pulses between a needle-like electrode and a flat electrode.

3. The method according to claim 2, wherein:

the step of applying includes applying the electrical pulses between the needle-like electrode having a first polarity and the flat electrode having a second polarity different from the first polarity.

4. The method according to claim 1, wherein, the one or more electrodes comprise an array of electrodes and wherein the step of positioning includes positioning the array of electrodes near the target area.

5. The method according to claim 1, wherein:

the step of positioning includes positioning the one or more electrodes near a target area containing fat tissue cells; and

the step of applying includes applying the electrical pulses in the amount above the upper limit of electroporation to irreversibly open pores in membranes of the fat tissue cells.

6. The method according to claim 1, wherein the step of applying includes applying electrical pulses whose amplitude is in a range of 20 Volt/mm and 2000 Volt/mm.

7. The method according to claim 1, wherein the step of applying includes applying electrical pulses whose amplitude is above 20 Volt/mm.

8. The method according to claim 1, wherein the step of applying includes applying electrical pulses whose duration is in a range of 10 microseconds and 100 milliseconds.

9. The method according to claim 1, wherein the step of applying includes applying electrical pulses whose amplitude is in a range of 20 Volt/mm and 2000 Volt/mm and whose duration is in a range of 10 microseconds and 100 milliseconds.

10. The method according to claim 1, wherein:

the one or more electrodes include an electromagnetic coil; and

the step of applying an electric field includes generating one or more magnetic pulses through the electromagnetic coil.

11. A method of treating a living human body by destroying tissue cells, comprising:

positioning an electric field applicator near a target area containing tissue cells to be killed in the living human body; and

applying an electric field through the positioned electric field applicator in an amount above an upper limit of electroporation to irreversibly open pores in membranes of the tissue cells to treat the living human body, thereby causing death of the tissue cells.

12. The method according to claim 11, wherein:

the electric field applicator includes first and second electrodes;

the step of positioning includes positioning the first and second electrodes near the target area; and

the step of applying an electric field includes applying electrical pulses between the first and second electrodes.

13. The method according to claim 12, wherein:

the first electrode is a needle-like electrode and the second electrode is a flat electrode; and

the step of applying an electric field includes applying the electrical pulses between the needle-like electrode and the flat electrode.

14. The method according to claim 12, wherein:

the first electrode is an electrode having a first polarity and the second electrode is an electrode having a second polarity different from the first polarity; and

the step of applying includes applying the electrical pulses between the first electrode and the second electrode.

15. The method according to claim 11, wherein the step of positioning includes positioning an array of electrodes near the target area.

16. The method according to claim 11, wherein:

the step of positioning includes positioning at least one electrode near a target area containing fat tissue cells; and

the step of applying an electric field includes applying the electric field in the amount above the upper limit of electroporation to irreversibly open pores in membranes of the fat tissue cells.

17. The method according to claim 11, wherein the step of applying includes applying an electrical pulse whose amplitude is in a range of 20 Volt/mm and 2000 Volt/mm.

18. The method according to claim 11, wherein the step of applying includes applying an electrical pulse whose amplitude is above 20 Volt/mm.

19. The method according to claim 11, wherein the step of applying includes applying an electrical pulse whose duration is in a range of 10 microseconds and 100 milliseconds.

20. The method according to claim 11, wherein the step of applying includes applying an electrical pulse whose amplitude is in a range of 20 Volt/mm and 2000 Volt/mm and whose duration is in a range of 10 microseconds and 100 milliseconds.

21. The method according to claim 11, wherein:

the electric field applicator includes an electromagnetic coil; and

the step of applying an electric field includes generating one or more magnetic pulses through the electromagnetic coil.