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Method and apparatus for determination of chemical species in body fluid

  • US 5,676,144 A
  • Filed: 06/07/1995
  • Issued: 10/14/1997
  • Est. Priority Date: 09/08/1988
  • Status: Expired due to Fees
First Claim
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1. A dermal concentration patch for determining the presence of a photosensitive analyte in a subject mammal'"'"'s perspiration, comprising:

  • a concentration layer having a first side and a second side;

    an attenuation layer disposed over the second side of the concentration layer for attenuating the amount of light reaching the concentration layer; and

    an adhesive membrane on at least one of the concentration layer or attenuation layer for securing the first side of the concentration layer in fluid communication with the subject'"'"'s skin,wherein water vapor is permitted to escape through the concentration layer and the attenuation layer and outside of the concentration patch.

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