SYSTEM FOR COMBINED TRANSCUTANEOUS BLOOD GAS MONITORING AND NEGATIVE PRESSURE WOUND TREATMENT

• US 20090253972A1
• Filed: 04/15/2009
• Published: 10/08/2009
• Est. Priority Date: 05/27/1999
• Status: Active Grant

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Johnson, Royce
• Granted Patent: US 9,199,015 B2
• Time in Patent Office: Days
• US Class Current: 600/345
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1468 using chemical or electrochemical methods, e.g. by polarographic means A61B5/1486 takes precedence
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61B 5/6834 using vacuum
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• 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

Abstract

A system for administering negative pressure therapy to a wound includes a screen adapted to be positioned at the wound. A reduced pressure source is in fluid communication with the screen, and a blood gas transducer is exposed to a reduced pressure provided by the reduced pressure source. The reduced pressure supplied by the reduced pressure source induces hyperperfusion of a blood gas at the wound.

Claims

1. A system for administering negative pressure therapy to a wound, the system comprising:

a screen adapted to be positioned at the wound;

a reduced pressure source in fluid communication with the screen;

a blood gas transducer exposed to a reduced pressure provided by the reduced pressure source; and

wherein the reduced pressure supplied by the reduced pressure source induces hyperperfusion of a blood gas at the wound.

2. The system of claim 1, wherein the blood gas transducer is an electrochemical blood gas transducer.

3. The system of claim 1, further comprising:

a cover adapted to be positioned over the screen at the wound to maintain the reduced pressure at the wound; and

wherein the blood gas transducer is adapted to be positioned beneath the cover.

4. The system of claim 1, further comprising:

a blood gas data acquisition device in communication with the blood gas transducer to capture a measure of gas pressure of the blood gas.

5. The system of claim 4, wherein the blood gas data acquisition device is further capable of estimating an arterial partial pressure of the blood gas using the measured gas pressure.

6. The system of claim 4, wherein the blood gas is oxygen.

7. The system of claim 4, wherein the blood gas is carbon dioxide.

8. The system of claim 4, wherein the blood gas transducer is electrically connected to the blood gas data acquisition device by an electrical cable.

9. The system of claim 8, wherein the reduced pressure source is in fluid communication with the blood gas transducer via a hose, the hose and electrical cable forming a unitary hose and cable pair.

10. The system of claim 1, further comprising:

a hydrophobic membrane positioned between the blood gas transducer and the reduced pressure source.

11. The system of claim 4, further comprising:

a transducer interface module operable to provide fluid communication between the reduced pressure source and the blood gas transducer, the transducer interface module further operable to provide electrical communication between the blood gas data acquisition device and the blood gas transducer.

12. The system of claim 11, wherein the transducer interface module comprises a male and female interference pair.

13. The system of claim 12, further comprising:

a hydrophobic membrane filter disposed in a male portion of the male and female interference pair.

14. The system of claim 1, wherein the blood gas transducer is at least partially disposed in the screen.

15. The system of claim 1, wherein the screen is a porous foam.

16. A transcutaneous blood gas monitoring system comprising:

a blood gas transducer unit adapted to be disposed adjacent a tissue site, the blood gas transducer unit having an electrochemical blood gas transducer;

a reduced pressure source in fluid communication with the blood gas transducer unit to expose the tissue site and the electrochemical blood gas transducer to a reduced pressure to induce hyperperfusion of a blood gas at the tissue site; and

a blood gas data acquisition device in communication with the blood gas transducer unit to capture a measure of gas pressure of the blood gas to estimate an arterial partial pressure of the blood gas.

17. The system of claim 16, wherein the blood gas is oxygen.

18. The system of claim 16, wherein the blood gas is carbon dioxide.

19. The system according to claim 16 further comprising a hydrophobic membrane filter positioned between the blood gas transducer unit and the reduced pressure source.

20. The system according to claim 16, wherein the tissue site is intact skin.

21. The system according to claim 16, wherein the tissue site is a wound undergoing negative pressure therapy.

22. A method for monitoring a blood gas pressure comprising:

inducing hyperperfusion of a blood gas at a tissue site by exposing the tissue site to a reduced pressure;

measuring a gas pressure of the blood gas at the tissue site; and

estimating an arterial partial pressure of the blood gas using the measured gas pressure.

23. The method of claim 22, wherein inducing hyperperfusion further comprises:

applying a blood gas transducer unit to the tissue site;

fluidly connecting a reduced pressure source to the blood gas transducer unit; and

applying the reduced pressure to the tissue site via the blood gas transducer unit.

24. The method of claim 23, wherein the blood gas transducer unit includes an electrochemical blood gas transducer.

25. The method of claim 22, wherein the tissue site is a skin surface.

26. The method of claim 22, wherein the blood gas is at least one of oxygen and carbon dioxide.