System for combined transcutaneous blood gas monitoring and negative pressure wound treatment

• US 9,199,015 B2
• Filed: 04/15/2009
• Issued: 12/01/2015
• 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
• Primary Examiner(s): D'Angelo, Michael
• Assistant Examiner(s): JANG, CHRISTIAN YONGKYUN
• Application Number:
  US12/424,390
• Publication Number:
  US 20090253972A1
• Time in Patent Office: 2,421 Days
• Field of Search: 600/364, 600/354
• US Class Current: 1/1
• 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 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 from a reduced pressure source comprising a vacuum pump operated by a motor;

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.

2. The method of claim 1, wherein inducing hyperperfusion further comprises:

applying a blood gas transducer unit to the tissue site;

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

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

3. The method of claim 2, wherein the blood gas transducer unit includes an electrochemical blood gas transducer.

4. The method of claim 1, wherein the tissue site is a skin surface.

5. The method of claim 1, wherein the blood gas is at least one of oxygen and carbon dioxide.

6. 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 from a reduced pressure source comprising a vacuum pump operated by a motor;

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;

wherein heating is not used to induce hyperperfusion.

7. The method of claim 6, wherein inducing hyperperfusion further comprises:

applying a blood gas transducer unit to the tissue site;

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

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

8. The method of claim 7, wherein the blood gas transducer unit includes an electrochemical blood gas transducer.

9. The method of claim 6, wherein the tissue site is a skin surface.

10. The method of claim 6, wherein the blood gas is at least one of oxygen and carbon dioxide.