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Transcutaneous non-bloody determination of the concentration of substances in the blood

  • US 5,836,317 A
  • Filed: 01/17/1997
  • Issued: 11/17/1998
  • Est. Priority Date: 05/20/1994
  • Status: Expired due to Term
First Claim
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1. A method for transcutaneous and non-bloody in vivo determination of an analyte in blood, comprising:

  • (a) spectroscopically generating at least one first signal corresponding to at least one analyte quantity in a region of a body and at least one second signal corresponding to at least one water quantity in the region of the body;

    (b) determining the at least one analyte quantity based on the at least one first signal and determining the at least one water quantity based on the at least one second signal;

    (c) calculating a concentration of the analyte in water by forming a ratio of a value related to the at least one analyte quantity and a value related to the at least one water quantity; and

    (d) calculating a concentration of the analyte in blood based on the ratio.

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