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Method and apparatus for noninvasive quantitative measurement of blood analytes

  • US 6,151,517 A
  • Filed: 01/22/1999
  • Issued: 11/21/2000
  • Est. Priority Date: 01/22/1999
  • Status: Expired due to Term
First Claim
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1. In a method for noninvasively determining the concentration of a blood analyte in a subject by transmitting light energy of at least one predetermined wavelength into a body part and measuring light energy emitted from the body part, the improvement comprising:

  • correcting the measurement of light energy by modifying measurement data to take into account changes in body geometry and/or body chemistry as a function of time, by mathematically transforming data received representing light energy transmitted through the body part by fitting said data to a predetermined mathematical series, and eliminating from said series terms associated with changing body geometry and/or body chemistry.

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