Differential gel body for a medical stimulation electrode

• US 6,898,465 B2
• Filed: 10/17/2001
• Issued: 05/24/2005
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: Kpr U.S., LLC (Cardinal Health, Inc.)
• Original Assignee: Ludlow Industries, Inc.
• Inventors: Gadsby, Peter, Howland, Warren
• Primary Examiner(s): Schaetzle, Kennedy
• Assistant Examiner(s): Mullen, Kristen
• Application Number:
  US09/981,167
• Publication Number:
  US 20030074042A1
• Time in Patent Office: 1,315 Days
• Field of Search: 600/372, 600/382, 600/386, 600/391, 600/392, 600395-397, 607 4- 5, 607/10, 607/115, 607/142, 607/148, 607/149, 607152-153
• US Class Current: 607/142
• CPC Class Codes: A61N 1/0428 Specially adapted for iontophoresis, e.g. AC, DC or including drug reservoirs
• CPC Class Codes: A61N 1/046 Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence

Abstract

A pair of disposable medical electrodes for delivering high-energy defibrillation or pacing stimulation are provided and include a positive electrode and a negative electrode. The positive electrode and the negative electrode each include an electrode member with a top face and a bottom face, a electrically conductive coating of a metal and a metal chloride, the coating being disposed on the bottom face, and an electrically conductive gel pad disposed on the coating. The amount of metal chloride included in the coating on the negative electrode is greater than the amount of metal chloride included in the coating on the positive electrode.

Claims

1. A pair of medical electrodes for delivering high-energy defibrillation or stimulation, said pair of electrodes comprising:

a first electrode including;

a first electrode member having a first top face and a first bottom face,

a first electrically conductive coating of a first metal and a first amount of metal chloride, said first coating being disposed on said first bottom face, and

a first electrically conductive gel pad disposed on said first coating; and

a second electrode including;

a second electrode member having a second top face and a second bottom face,

a second electrically conductive coating of a second metal and a second amount of metal chloride, said second coating being disposed on said second bottom face, said second amount of metal chloride being greater than said first amount of metal chloride, and

a second electrically conductive gel pad disposed on said second coating;

said first electrically conductive coating comprises;

(a) a first center with a first amount of a first conductor,

(b) a first inner edge defining the terminus of said first center and a first step at which said conductor drops from said first amount of said first conductor to a second amount of said first conductor,

(c) a first outer edge defining the terminus of said first coating and at which said first conductor is substantially absent, and

(d) a first predetermined gradient disposed between said first inner edge and said first outer edge; and

said second electrically conductive coating comprises;

(a) a second center with a first amount of a second conductor,

(b) a second inner edge defining the terminus of said second center and a second step at which said second conductor drops from said first amount of said second conductor to a second amount of said second conductor,

(c) a second outer edge defining the terminus of said second coating and at which said second conductor is substantially absent, and

(d) a second predetermined gradient disposed between said second inner edge and said second outer edge.

2. The pair of electrodes of claim 1, said first electrode further comprising a first insulative cover sheet disposed on said first top face, and said second electrode further comprising a second insulative cover sheet disposed on said second top face.

3. The pair of electrodes of claim 1 additionally comprising a first electrical connector in contact with said first top face and a second electrical connector in contact with said second top face, said first and second electrical connectors for delivering energy to and transmitting energy from said first and said second electrodes.

4. The pair of electrodes of claim 1, said first electrode further comprising a first removable release carrier sheet disposed on said first gel pad before use of said first electrode, and said second electrode further comprising a second removable release carrier sheet disposed on said second gel pad before use of said second electrode.

5. The pair of electrodes of claim 1, wherein said first metal and said second metal are silver.

6. The pair of electrodes of claim 1, wherein said metal chloride in said first and said second electrically conductive coating is silver chloride.

7. The pair of electrodes of claim 1, wherein said first electrode is a positive electrode and said second electrode is a negative electrode.

8. The pair of electrodes of claim 1, wherein said first electrical connector and said second electrical connector comprise a fanned wire.

9. The pair of electrodes of claim 1 wherein each of said first electrode and said second electrode are an electrically conductive, carbon-filled polymer, and each of said first gel pad and said second gel pad comprises a skin-compatible hydrogel.

10. The pair of electrodes of claim 1 wherein each of said first electrode member and said second electrode member have an area of at least 50 cm2.

11. The pair of electrodes of claim 8, wherein said fanned wire comprises conductive, copper-nickel coated carbon fibers.

12. The pair of electrodes of claim 1 wherein each of said first coating and said second coating is an ink coating.

28. The pair of electrodes of claim 1 wherein said first gel pad comprises a first buffer, and said second gel pad comprises a second buffer.

29. The pair of electrodes of claim 28 wherein said first buffer is selected from the group consisting of piprizene dihydrochloride in combination with glycylglycine and sodium hydrogen maleate.

30. The pair of electrodes of claim 28 wherein said second buffer is selected from the group consisting of piprizene dihydrochloride in combination with glycylglycine and sodium hydrogen maleate.

13. A pair of medical electrodes for delivering high-energy defibrillation or stimulation, said pair of electrodes comprising:

a first electrode including;

a first electrode member having a first top face and a first bottom face,

a first electrically conductive coating of a first metal and a first amount of metal chloride, said first coating being disposed on said first bottom face, and

a first electrically conductive gel pad disposed on said first coating, said first gel pad including a first buffer; and

a second electrode including;

a second electrode member having a second top face and a second bottom face,

a second electrically conductive coating of a second metal and a second amount of metal chloride, said second coating being disposed on said second bottom face, and

a second electrically conductive gel pad disposed on said second coating, said second gel pad including, a second buffer;

said first electrically conductive coating comprises;

(a) a first center with a first amount of a first conductor,

(b) a first inner edge defining the terminus of said first center and a first step at which said first conductor drops from said first amount of said first conductor to a second amount of said first conductor,

(c) a first outer edge defining the terminus of said first coating and at which said first conductor is substantially absent, and

(d) a first predetermined gradient disposed between said first inner edge and said first outer edge; and

said second electrically conductive coating comprises;

(a) a second center with said first amount of a second conductor,

(b) a second inner edge defining the terminus of said second center and a second step at which said second conductor drops from said first amount of said second conductor to a second amount of said second conductor,

(c) a second outer edge defining the terminus of said second coating and at which said second conductor is substantially absent, and

(d) a second predetermined gradient disposed between said second inner edge and said second outer edge.

14. The pair of electrodes of claim 13 wherein said first buffer is selected from the group consisting of piprizene dihydrochloride in combination with glycylglycine and sodium hydrogen maleate.

15. The pair of electrodes of claim 13 wherein said second buffer is selected from the group consisting of piprizene dihydrochloride in combination with glycylglycine and sodium hydrogen maleate.

16. The pair of electrodes of claim 13 wherein said second amount of metal chloride is greater than said first amount of metal chloride.

17. The pair of electrodes of claim 13, said first electrode further comprising a first insulative cover sheet disposed on said first top face, and said second electrode further comprising a second insulative cover sheet disposed on said second top face.

18. The pair of electrodes of claim 13 additionally comprising a first electrical connector in contact with said first top face and a second electrical connector in contact with said second top face, said first and second electrical connectors for delivering energy to and transmitting energy from said first and said second electrodes respectively.

19. The pair of electrodes of claim 13, said first electrode further comprising a first removable release carrier sheet disposed on said first gel pad before use of said first electrode, and said second electrode further comprising a second removable release carrier sheet disposed on said second gel pad before use of said second electrode.

20. The pair of electrodes of claim 13, wherein said first metal and said second metal are silver.

21. The pair of electrodes of claim 13, wherein said metal chloride in said first and said second electrically conductive coating is silver chloride.

22. The pair of electrodes of claim 13, wherein said first electrode is a positive electrode and said second electrode is a negative electrode.

23. The pair of electrodes of claim 13, wherein said first electrical connector and said second electrical connector comprises a fanned wire.

24. The pair of electrodes of claim 13 wherein each of said first electrode and said second electrode are an electrically conductive, carbon-filled polymer, and each of said first gel pad and said second gel pad comprises a skin-compatible hydrogel.

25. The pair of electrodes of claim 13 wherein each of said first electrode member and said second electrode member have an area of at least 50 cm2.

26. The pair of electrodes of claim 23, wherein said fanned wire comprises conductive, copper-nickel coated carbon fibers.

27. The pair of electrodes of claim 13 wherein each of said first coating and said second coating is an ink coating.