CURRENT PRODUCING SURFACE FOR TREATING BIOLOGIC TISSUE

• US 20090062723A1
• Filed: 10/13/2008
• Published: 03/05/2009
• Est. Priority Date: 02/19/2004
• Status: Active Grant

• Current Assignee: Franklin Mountain Investments Limited Partnership
• Original Assignee: Silverleaf Medical Products, Inc.
• Inventors: Skiba, Jeffry B.
• Granted Patent: US 7,813,806 B2
• Time in Patent Office: Days
• US Class Current: 604/20
• CPC Class Codes: A61N 1/303 Constructional details electrodes for external use A61N1/0428

Abstract

In an embodiment, an article includes a primary surface, and a pattern of spaced dissimilar materials, on the primary surface. The pattern is to spontaneously produce electrical surface currents when brought into contact with an electrically conducting solution.

Claims

1. An apparatus for treating an area of biologic tissue comprising:

a substrate having a substrate surface;

multiple first reservoirs joined with said substrate, said multiple first reservoirs including a reducing agent, first reservoir surfaces of said multiple first reservoirs being positioned on said substrate surface, said multiple first reservoirs including a first pattern of reservoirs; and

multiple second reservoirs joined with said substrate, said multiple second reservoirs including an oxidizing agent, second reservoir surfaces of said multiple second reservoirs being positioned on said substrate surface, and said multiple second reservoirs including a second pattern of reservoirs interleaved with said first pattern of reservoirs to form an alternating arrangement of said first reservoirs and said second reservoirs, said alternating arrangement of said first and second reservoirs defining an active surface of said apparatus, said active surface being adapted to be placed in contact with said area of biologic tissue, and currents are generated between adjacent ones of said first and second reservoirs in said active surface for penetration into said area of biologic tissue.

2. An apparatus as claimed in claim 1 wherein a size of said active surface is in a range of approximately 1-50 cm².

3. An apparatus as claimed in claim 1 wherein:

each of said first reservoirs exhibits a first diameter of approximately 2 mm;

each of said second reservoirs exhibits a second diameter of approximately 1 mm; and

a lateral spacing between corresponding perimeters of adjacent ones of said first reservoirs and said second reservoirs is in a range of approximately 0.5-2.0 mm.

4. An apparatus as claimed in claim 3 wherein said lateral spacing between said corresponding perimeters of said adjacent ones of said first reservoirs and said second reservoirs prevents the contact of said adjacent ones of said first reservoirs with said second reservoirs.

5. An apparatus as claimed in claim 1 wherein:

said each of said first reservoirs exhibits a first mass of said reducing agent; and

said each of said second reservoirs exhibits a second mass of said oxidizing agent, said first mass being approximately twice as much as said second mass.

6. An apparatus as claimed in claim 1 wherein:

said reducing agent includes silver; and

said oxidizing agent includes zinc, an amount of said zinc in each of said multiple second reservoirs being approximately half of an amount of said silver in each of said multiple first reservoirs.

7. An apparatus as claimed in claim 1 wherein:

each of said multiple first reservoirs includes a binder material attached with said reducing agent; and

each of said multiple second reservoirs includes said binder material attached with said oxidizing agent, said binder material in said multiple first and second reservoirs degrading in the presence of an electrolytic solution, wherein degradation of said binder material exposes said reducing agent at said first reservoir surfaces of said first reservoirs and exposes said oxidizing agent in said multiple second reservoirs at said second reservoir surfaces of said second reservoirs.

8. An apparatus as claimed in claim 7 wherein:

said binder material comprises a solvent reducible polymer;

said each of said multiple first reservoirs includes a first mixture of said reducing agent and said binder, said first mixture including approximately 10-40 percent of said reducing agent and a remainder of said first mixture being said binder; and

said each of said multiple second reservoirs includes a second mixture of said oxidizing agent and said binder, said second mixture including approximately 10-40 percent of said oxidizing agent and a remainder of said second mixture being said binder.

9. An apparatus as claimed in claim 7 wherein said binder material comprises a biocompatible solvent reducible polymer.

10. An apparatus as claimed in claim 1 wherein said substrate comprises a pliable dressing material, said substrate surface is a face of said pliable dressing material, and said face of said pliable dressing material is adapted to be applied with said active surface facing said area of biologic tissue.

11. An apparatus as claimed in claim 10 further comprising:

an absorbent cloth layer fixed to a back of said pliable dressing material, said back opposing said face of said pliable dressing; and

an elastic adhesive layer bonded to said absorbent cloth layer, said elastic adhesive layer including at least one overlapping piece of said elastic adhesive layer for securing said face of said pliable dressing material over said area of biologic tissue in a manner that enables said reducing and oxidizing agents to be introduced directly to said area of biologic tissue.

12. An apparatus as claimed in claim 1 wherein said alternating arrangement of said first and second reservoirs defines an array of voltaic cells for spontaneously generating said currents in the form of an array of electrical currents across said active surface when introduced to an electrolytic solution.

13. An apparatus as claimed in claim 12 wherein said area of biologic tissue is skin tissue having an epidermis and a dermis, and a lateral spacing between corresponding perimeters of adjacent ones of said first reservoirs and said second reservoirs is approximately 1 mm such that each of said voltaic cells creates approximately 1 volt of potential to substantially penetrate said epidermis and said dermis.

14. An apparatus as claimed in claim 1 wherein:

said multiple first reservoirs are formed from a first fluid that includes said reducing agent; and

said multiple second reservoirs are formed from a second fluid that includes said oxidizing agent, each of said first and second fluids being printed into a position of contact with said substrate surface.

15. An apparatus as claimed in claim 1 wherein said apparatus comprises a wound dressing, and said area of biologic tissue comprises damaged tissue.

16. A wound dressing for treating an area of damaged tissue comprising:

a substrate having a substrate surface;

multiple first reservoirs joined with said substrate, each of said multiple first reservoirs including a first mass of a reducing agent, first reservoir surfaces of said multiple first reservoirs being positioned on said substrate surface, said multiple first reservoirs including a first pattern of reservoirs; and

multiple second reservoirs joined with said substrate, each of said multiple second reservoirs including a second mass of an oxidizing agent, said first mass being approximately twice as much as said second mass, second reservoir surfaces of said multiple second reservoirs being positioned on said substrate surface, and said multiple second reservoirs including a second pattern of reservoirs interleaved with said first pattern of reservoirs to form an alternating arrangement of said first reservoirs and said second reservoirs, said alternating arrangement of said first and second reservoirs defining an active surface of said apparatus, said active surface being adapted to be placed in contact with said area of damaged tissue, and currents are generated between adjacent ones of said first and second reservoirs in said active surface for penetration into said area of damaged tissue to facilitate recovery of said damaged tissue.

17. A wound dressing as claimed in claim 16 wherein a size of said active surface is in a range of approximately 1-50 cm².

18. A wound dressing as claimed in claim 16 wherein:

said each of said multiple first reservoirs includes a binder material attached with said reducing agent; and

said each of said multiple second reservoirs includes said binder material attached with said oxidizing agent, said binder material in said multiple first and second reservoirs degrading in the presence of an electrolytic solution, wherein degradation of said binder material exposes said reducing agent at said first reservoir surfaces of said first reservoirs and exposes said oxidizing agent in said multiple second reservoirs at said second reservoir surfaces of said second reservoirs.

19. A wound dressing as claimed in claim 16 wherein said substrate comprises a pliable dressing material, said substrate surface is a face of said pliable dressing material, and said face of said pliable dressing material is adapted to be applied with said active surface facing said area of damaged tissue.

20. A wound dressing as claimed in claim 16 wherein said alternating arrangement of said first and second reservoirs defines an array of voltaic cells for spontaneously generating said currents in the form of an array of electrical currents across said active surface when introduced to an electrolytic solution.