Electrochemical eradication of microbes on surfaces of objects

Patent metadata

Field	Value
Publication number	US-9616142-B2
Application number	US-201414540213-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Aug 3, 2009
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The invention describes a method of reducing or preventing the growth of microbes on the surface of an object, wherein the object is of such material that it can act as a working electrode. The method comprises the steps of providing a counter electrode, and a reference electrode. The object is used as the working electrode. Electrical current is passed through the working and counter electrodes. The current through the counter electrode is varied such that the electric potential of the working electrode is constant relative to the electric potential of the reference electrode. Also described is an apparatus for reducing or preventing microbes on an object using a potentiostatic device.

First claim

What is claimed is:

1. A method of treating a surface of an object, wherein the object is of such material that it can act as a working electrode, the method comprising:
providing a reference electrode, a counter electrode, and the object acting as the working electrode;
passing electrical current through the working and counter electrodes, wherein the current through the counter electrode is varied such that the electric potential of the working electrode is substantially constant relative to the electric potential of the reference electrode; and
wherein the object is implantable or implanted.

2. The method of claim 1 , wherein the step of passing electrical current through the working and counter electrodes is performed using a potentiostatic device.

3. The method of claim 2 , wherein the potentiostatic device is a potentiostat.

4. The method of claim 1 , further comprising the step of providing an antimicrobial agent to a region surrounding the object.

5. The method of claim 1 , wherein the implantable or implanted object has an oxide layer on at least part of the surface of the object.

6. The method of claim 1 , wherein the implantable or implanted object is at least partially made from titanium.

7. The method of claim 1 , wherein the implantable or implanted object is at least partially made from stainless steel, cobalt, chromium, molybdenum or any combination thereof.

8. The method of claim 1 , wherein the reference electrode is at least partially made from silver or silver chloride.

9. The method of claim 1 , wherein the counter electrode is at least partially made from platinum, graphite, or carbonized silicone rubber.

10. The method of claim 1 , wherein the passing of electrical current results in reducing or preventing the growth of microbes.

11. The method of claim 10 , wherein the microbes are a part of a biofilm.

12. The method of claim 11 , wherein the microbes are bacteria or fungi.

13. The method of claim 1 , wherein the constant electric potential of the working electrode is selected from the range of about −0.5 to about −10.0 V with respect to the reference electrode.

14. A method of treating a surface of an object, wherein the object is of such material that it can act as a working electrode, the method comprising:
providing a reference electrode, a counter electrode, and the object acting as the working electrode;
passing electrical current through the working and counter electrodes, wherein the current through the counter electrode is varied such that the electric potential of the working electrode is substantially constant relative to the electric potential of the reference electrode; and
wherein the passing of electrical current results in reducing or preventing the growth of microbes.

15. The method of claim 14 , wherein the microbes are a part of a biofilm.

16. The method of claim 15 , wherein the microbes are bacteria or fungi.

Assignees

• Univ New York State Res Found
• Univ Syracuse

Inventors

• Ehrensberger Mark
• Campagnari Anthony A
• Takeuchi Esther
• Luke-Marshall Nicole
• Gilbert Jeremy

Classifications

• A61L2103/15

  Laboratory, medical or dentistry appliances, e.g. catheters or sharps · CPC title

• A61L2103/05

  Living organisms or biological materials · CPC title

• A61F2002/482

  Human Necessities · mapped topic

• A61L2/03 Primary

  Electric current · CPC title

• A61F2/30

  Joints · CPC title