Patent ID: 11896358
Assignee: WELLNESS ALLIED INC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 16:
17. A method for measuring skin impedance, comprising:
applying step-function DC voltages of various magnitudes to the stimulating electrode, to form forward and reverse DC voltages between stimulating and reference electrodes and conducting the voltage to the skin through electrodes;
measuring the forward skin impedance and reverse skin impedance with forward and reverse DC voltages;
determining whether the measured results are abnormal based on the differences between the forward and reverse skin impedances;
correcting abnormal results by adjusting the magnitudes and time duration of the step-function DC voltages, and/or generating additional AC voltages of adjustable magnitude and frequency based on the difference of the forward and reverse skin impedances, applying these voltages to the skin through electrodes;
remeasuring the skin impedance to check if the forward and reverse skin impedance difference is reduced to a preset small range;
if the difference between the forward and reverse skin impedance cannot be reduced below a threshold, recording the forward and reverse skin impedances, calculating arithmetic and geometric averages to estimate the true skin impedance and provide as clinical evidence for future diagnosis and therapy.