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Sensor system

  • US 7,964,390 B2
  • Filed: 02/03/2005
  • Issued: 06/21/2011
  • Est. Priority Date: 10/11/2002
  • Status: Active Grant
First Claim
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1. A multivariable sensor system for simultaneously detecting one or more analytes in a fluid of a person, said sensor system comprising:

  • an elongated sensor body including an array of spaced apart cavities;

    a plurality of optode sensing microbeads disposed in at least one cavity, said plurality of optode sensing microbeads comprising a first set of microbeads that include an indicator material and a detection substance;

    a reference element disposed in at least one other cavity for providing a standard color by which a color change of said plurality of optode sensing microbeads is compared; and

    a multilayered analyte-permeable membrane covering each of said cavities;

    wherein said detection substance comprises an enzyme that reacts with the analyte or catalyzes the reaction of the analyte to produce a detectable reaction product;

    wherein said at least one indicator material comprises a light-absorbing, pH-sensitive dye that undergoes a color change in response to the analyte or to the detectable reaction product thereof;

    wherein the color change is reversible depending upon the concentration of the one or more analytes.

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