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Non-invasive near-infrared quantitative measurement instrument

  • US 5,237,178 A
  • Filed: 12/30/1991
  • Issued: 08/17/1993
  • Est. Priority Date: 06/27/1990
  • Status: Expired due to Term
First Claim
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1. A near-infrared quantitative analysis instrument for non-invasive measurement of a blood analyte present in a body part of a subject, said analysis instrument comprising:

  • (a) introducing means including a near-infrared energy source for introducing near-infrared energy into blood present in a body part of a subject;

    (b) detecting means for detecting near-infrared energy emerging from the body part;

    (c) a housing means for housing at least said introducing means and said detecting means, said housing means comprising a chamber means for enabling said body part of said subject to be exposed to said near-infrared energy, said introducing means and said detecting means being positioned about said chamber means such that near-infrared energy emitted by said introducing means is receivable by said detecting means;

    (d) an insert means for receiving said body part of said subject and for engaging said chamber means, said insert means comprising window means for permitting said near-infrared energy emitted from said introducing means to pass through said insert means and to be receivable by said detecting means; and

    (e) processing means for calculating an electrical signal from said detection means into a signal indicative of the quantity of said blood analyte present in the blood of the subject.

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