System for combined transcutaneous blood gas monitoring and negative pressure wound treatment
First Claim
1. A transcutaneous blood gas monitoring device particularly suited for application to a site on a patient'"'"'s skin under a local vacuum, comprising:
- a non-invasive blood gas data acquisition device, the non-invasive blood gas data acquisition device adapted to measure skin surface oxygen and carbon dioxide pressure;
a vacuum source in fluid communication with a wound site in proximity to the site on the patient'"'"'s skin for applying a negative pressure to the wound site;
an electrochemical blood gas transducer unit in fluid communication with said vacuum source;
a transducer interface module communicating between the electrochemical blood gas transducer unit, the vacuum source and the non-invasive blood gas data acquisition device and adapted to reduce or eliminate contamination; and
a screen formed to fit within said wound site.
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Accused Products
Abstract
A method and apparatus for the transcutaneous monitoring of blood gases generally comprises a blood gas data acquisition device, a vacuum source and a blood gas transducer unit. The blood gas transducer unit is adapted for application to a patient'"'"'s skin and administration of a local vacuum at the area of patient application. It further comprises an electrochemical blood gas transducer, well known to those of ordinary skill in the art, which is disposed entirely within the local vacuum at the area of patient application. The vacuum source is placed in fluid communication with the blood gas transducer unit, through a hydrophobic membrane filter for safety purposes, in order to induce a condition of hyperperfusion in the locality of the electrochemical blood gas transducer. Under the control of a microcontroller, or equivalent means, the blood gas acquisition device is then utilized to capture a measure of skin surface oxygen or carbon dioxide pressure. The microcontroller can then utilize this measure to arrive at an estimate of arterial partial pressure of oxygen or carbon dioxide, accordingly. Because vacuum induced perfusion produces the requisite condition of hyperperfusion without local heating and, therefore, without acceleration of the local metabolic function, the present invention results in more accurate than previously available estimates of partial pressure blood gas pressures and does so while eliminating a significant risk for injury to the patient.
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Citations
31 Claims
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1. A transcutaneous blood gas monitoring device particularly suited for application to a site on a patient'"'"'s skin under a local vacuum, comprising:
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a non-invasive blood gas data acquisition device, the non-invasive blood gas data acquisition device adapted to measure skin surface oxygen and carbon dioxide pressure; a vacuum source in fluid communication with a wound site in proximity to the site on the patient'"'"'s skin for applying a negative pressure to the wound site; an electrochemical blood gas transducer unit in fluid communication with said vacuum source; a transducer interface module communicating between the electrochemical blood gas transducer unit, the vacuum source and the non-invasive blood gas data acquisition device and adapted to reduce or eliminate contamination; and a screen formed to fit within said wound site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A transcutaneous blood gas monitoring device particularly suited for application to a site on a patient'"'"'s skin under a local vacuum, comprising:
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a non-invasive blood gas data acquisition device; a vacuum source in fluid communication with a wound site in proximity to the site on the patient'"'"'s skin for applying a negative pressure to the wound site; an electrochemical blood gas transducer unit in fluid communication with said vacuum source, the electrochemical blood gas transducer unit in electrical communication with the non-invasive blood gas data acquisition device through an interposed electrical cable, and the vacuum source in fluid communication with the electrochemical blood gas transducer unit through an interposed vacuum hose; a transducer interface module communicating between the electrochemical blood gas transducer unit, the vacuum source and the non-invasive blood gas data acquisition device and adapted to reduce or eliminate contamination; a screen formed to fit within said wound site; and a collection canister interposed between the vacuum source and the screen, wherein the interposed vacuum hose is bifurcated at a position between the vacuum source and the collection canister to prevent fluids drawn from the wound site from interfering with the electrochemical blood gas transducer unit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification