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Biological information measuring system

  • US 5,427,113 A
  • Filed: 06/19/1992
  • Issued: 06/27/1995
  • Est. Priority Date: 02/20/1988
  • Status: Expired due to Term
First Claim
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1. An apparatus for measuring electrical characteristics of a body, the apparatus comprising:

  • a first electrode adapted to be positioned on the body;

    a second electrode adapted to be positioned on the body and spaced from said first electrode;

    voltage pulse means for applying a substantially rectangular voltage pulse across said first and second electrodes;

    waveform recording means for recording a current I(t) flowing through said first and second electrodes during said voltage pulse as a current waveform;

    waveform analyzing means for analyzing said current waveform to determine parameters Ii0, τ

    i, and IDC, which relates to said current waveform by the formula ##EQU11## where, n=a positive integer greater than one,Ii0 =a plurality of waveform parameters,t=time,τ

    =a plurality of time constants,IDC =a DC component of said waveform,said parameters Ii0, τ

    i, and IDC representing the electrical characteristics of the body.

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