Electrochemical Wound Therapy Device

• US 20080183119A1
• Filed: 12/17/2007
• Published: 07/31/2008
• Est. Priority Date: 09/08/2003
• Status: Active Grant

• Current Assignee: Microlin LLC
• Original Assignee: Microlin LLC
• Inventors: Joshi, Ashok V.
• Granted Patent: US 8,012,169 B2
• Time in Patent Office: Days
• US Class Current: 602/42
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2202/0208 Oxygen

Abstract

A disposable wound-healing device is disclosed that incorporates a housing having a fluid-impermeable material having a cavity and a perimeter that can be sealed in an air-tight manner over a wound region of a patient. The device is capable of producing a negative pressure over the wound region by either removing oxygen from within the cavity, or absorbing fluid into the cavity and then removing the fluid from the cavity. The oxygen may be removed via chemical absorption, by an electrochemical cell or by a chemical reaction that cannibalizes oxygen from the cavity. The fluid may be removed through the use of osmotic or electro-osmotic cells, or through a one-way valve. The negative partial pressure over the wound region promotes healing.

Claims

1. A disposable wound-therapy device comprising:

a housing forming a cavity therein, wherein the cavity communicates with at least one opening adapted to encompass at least a portion of a wound region of a patient;

a perimeter surrounding the at least one opening;

means for sealing the perimeter to a surface of the patient proximate the wound region;

a porous sponge at least partially inside the cavity and capable of retaining a fluid therein;

a chamber in communication with the cavity; and

an electrochemical cell for removing the fluid from the sponge and transporting the fluid into the chamber.

2. The wound-therapy device of claim 1, wherein the electrochemical cell is integrated into the housing.

3. The wound-therapy device of claim 1, wherein the electrochemical cell is an electro-osmotic cell.

4. The wound-therapy device of claim 3, wherein the electro-osmotic cell comprises an anode and a cathode.

5. The wound-therapy device of claim 3, wherein the electro-osmotic cell comprises an osmotic membrane positioned between the cavity and the chamber.

6. The wound-therapy device of claim 5, wherein the osmotic membrane is a cationic membrane.

7. The wound-therapy device of claim 5, wherein the osmotic membrane is an anionic membrane.

8. The wound-therapy device of claim 5, wherein the osmotic membrane is in fluidic communication with the porous sponge.

9. The wound-therapy device of claim 1, wherein the porous sponge comprises an antimicrobial material.

10. The wound-therapy device of claim 1, wherein the porous sponge is configured to be at least partially impregnated with a fluid.

11. A disposable wound-therapy device comprising:

a housing forming a cavity, wherein the cavity communicates with at least one opening adapted to encompass at least a portion of a wound region of a patient;

a perimeter substantially surrounding the at least one opening to provide a seal between the cavity and a surface of the patient proximate the wound region;

a retention chamber in communication with the cavity; and

an electro-osmotic cell having an osmotic membrane positioned between the retention chamber and the cavity to remove fluid from within the cavity and transport the fluid into the retention chamber.

12. The wound-therapy device of claim 11, wherein the electro-osmotic cell comprises an anode and a cathode.

13. The wound-therapy device of claim 11, wherein the osmotic membrane is a cationic membrane.

14. The wound-therapy device of claim 11, wherein the osmotic membrane is an anionic membrane.

15. The wound-therapy device of claim 11, further comprising a porous sponge at least partially inside the cavity to retain the fluid prior to removal.

16. The wound-therapy device of claim 15, wherein the porous sponge comprises an antimicrobial material.

17. The wound-therapy device of claim 15, wherein the porous sponge is configured to be at least partially impregnated with a fluid prior to use.

18. The wound-therapy device of claim 15, wherein the osmotic membrane is in fluidic communication with the porous sponge.

19. A method to promote healing of a wound region of a patient, the method comprising:

providing a housing forming a cavity, the cavity comprising at least one opening configured to encompass at least a portion of a wound region of a patient;

sealing a perimeter of the at least one opening to a surface of the patient proximate the wound region;

providing a retention chamber in communication with the cavity; and

electro-osmotically removing fluid from the cavity for transport into the retention chamber.

20. The method of claim 19, further comprising absorbing fluid in the cavity with a porous sponge.