Patent ID: 7403816

Claim:
An apparatus for analyzing bioelectrical response waveform information obtained from measurements of skin impedance measured by applying a pulse voltage to a body, the apparatus being characterized by comprising: first means for determining a current value P 1 at a current peak time when a current is at its peak upon application of the pulse voltage; second means for determining a current value P 2 after a predetermined amount of time from the current peak time, said predetermined amount of time being an amount of time that elapses before a characteristic point at which a dermis layer and epidermis begin to electrically mix; third means for determining a current value NT when the current reaches an equilibrium state with a further elapse of time after the predetermined amount of time; fourth means for determining a difference between the current values P 1 and P 2 ; fifth means for determining a difference between the current values P 2 and NT; and sixth means for analyzing bioelectrical response waveform information by using three values as parameters, two of the three values, ES and IS, being ratios between the values A and B determined by the fourth and fifth means respectively, where ES=A/B and IS=B/A, and the third value being NT.