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Apparatus and method for determination of the adequacy of dialysis by non-invasive near-infrared spectroscopy

  • US 6,212,424 B1
  • Filed: 10/29/1998
  • Issued: 04/03/2001
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Fees
First Claim
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1. A method for assessing the need for hemodialysis, the progress of a hemodialysis procedure or the adequacy of a hemodialysis treatment, said method comprising the steps of:

  • providing a means for optical analysis of tissue on a patient, said means providing an output spectrum at multiple wavelengths, wherein said output spectrum has varying intensities as related to absorption by said tissue;

    coupling said tissue to said means for optical analysis and acquiring said output spectrum before, during or after hemodialysis for assessing the need for hemodialysis, the progress of a hemodialysis procedure or the adequacy of the hemodialysis treatment, respectively; and

    , calculating a tissue urea concentration from a mathematical model relating said output spectrum to said tissue urea concentration.

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