Patent ID: 6167299
Filing Date: 2000-12-26
Classification: A61B,A61N

Abstract:
A method of galvanic skin reactions monitoring comprising the operations:fastening of two electrodes on the body of a subject,application of electric voltage to the said electrodes,monitoring time variations of electric current flowing between said electrodes,registering electric current pulses in the frequency band of an electrodermal activity phasic component, andanalysis of the shape of each of said pulses, wherein:(a) the signal is registered as the time derivative of the logarithm of electric current numerical value,(b) the trend value is defined, said trend value being caused by signal variations in the frequency band of electrodermal activity tonic component, and adjustment of the first derivative value is performed by subtracting the value of the trend from the said first derivative value,(c) the second derivative in time of said numerical value of the logarithm of the electric current is registered,(d) the pulse onset of said signal is determined as the moment of said second derivative exceeding a threshold value, and(e) conformity of the pulse shape to the preset criteria is determined,said pulse being classified as a phasic component pulse provided existence of this conformity and as an artifact otherwise.