Apparatus for measuring interfacial impedance between the body and a simulating electrode

Abstract

The present invention relates to an apparatus for measuring interfacial impedance between the body and a stimulating electrode, comprising: a first electrode connected to some cells in the body; a second electrode connected to other cells in the body so as to provide a current which is applied by a stimulator to the first electrode through the cells; a measurement unit for selectively extracting voltages loaded on the first and second electrodes according to currents applied to the first and second electrodes; a charge storage unit to which a relative potential corresponding to a voltage difference between the first and second electrodes is stored; an A / D conversion unit for converting the signal corresponding to the relative potential into a digital signal and for outputting the digital signal; and an impedance calculation unit for calculating the interfacial impedance between the first and second electrodes according to the digital signal outputted from the A / D conversion unit and the current applied to the second electrode. Therefore, according to the present invention, interfacial impedance between the body and a stimulating electrode implanted to the brain or muscle of the body can be measured by using the difference in voltages loaded on each electrode.

Description

technical field [0001] The present invention relates to a device for analyzing the electrochemical properties of a stimulating electrode that uses the function of transmitting an electrical stimulation signal generated by a neurostimulator that electrically stimulates a nerve or muscle in contact to restore the nerve or the loss of sensitive function or motor function of muscles, and more specifically, relates to a device for measuring the interface impedance between a living body and a stimulating electrode, which can be used in real time after the stimulating electrode is implanted in the living body according to the passage of time The changes in the interface impedance between the body and the stimulating electrodes are accurately measured based on the biological environment around the electrodes. Background technique [0002] Various sensory and motor functions of the human body are controlled or influenced by neural activity in the brain. Neural activity in the brain ...

AI Technical Summary

Problems solved by technology

However, these methods use D / A converters, A / D converters, oscillators, etc. with high precision and complex structures, resulting in a large amount of power consumption and long measurement times

In addition, since such a structure requires a large number of parts, when fabricating a system semiconductor chip as a core part of a small electrical nerve stimulator implanted in a living body, cost increases due to an increase in area

Additionally, significant power consumption shortens the lifespan of the neurostimulator

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