SU1200901A1 - Electrode device - Google Patents

Abstract

ELECTRODE DEVICE, containing a dielectric body in which a dielectric porous contact element saturated with electrolyte is located, and a current-carrying element, characterized in that, in order to increase service life, the porous contact element on the side opposite to the working part has a recess on which surface a silver layer is deposited, connected to the current-withdrawing element by means of a spa, the part of the porous contact element adjacent to the silver layer is filled with silver chloride and as an electric Rolita is used, the following soup and composition: wt./about: Water31-35 Potassium chloride 10-13 Agar-Agar2-3 Polyacrylamide 0.5-0.8 Glycerin Other (L to about o with

Description

The invention relates to devices for measuring biopotentials and can be widely used in medical diagnostic devices.

The purpose of the invention is to increase the service life.

The drawing shows the structure of the electrode device.

The device contains a porous contact element 1 having a recess on top in which silver layer 2 is applied. Part of the volume of flop 3, located in the immediate vicinity of the silver layer 2, is filled with AgCl salt, and the remaining part of the pore volume is filled with electrolyte. Spay 4 provides an electrical contact current lead w. His element 5 with a layer of silver. The silver layer 2 and the junction 4 are insulated into the body 6 in order to isolate and increase the reliability of the electrode, as well as to give it a certain shape. In the lower part of the body there is a recess intended for applying a glue ring to it. Element 5 is the counterpart of the connector connecting the electrode to the connecting wire.

Porous contact element nasysh, ene electrolyte of the following composition, wt. ° / o:

Water

31-35

Potassium chloride 10-13

Agar agar

Polyacrylamide

0.5-0.8

Glycerin Else

The principle of the electrode is as follows. The bioelectric potential arising on the skin is applied to the working surface of the diaphragm and through the electrolyte and AgCl salt, located in the pores, to a thin silver film, then the potential through the contact and connecting wire is applied to the input of the biopotential amplifier.

The electrodes of this design, impregnated with electrolyte of the proposed composition, were tested for 3 years and showed high technical and operational characteristics: the spread of the electrode potential is not more than 1 mV, the drift of the electrode

potential not. more than 0.05 µV / s, the interelectrode resistance of two electrodes (with a contact area of 1 cm) is not more than 100 Ohm, the time of stabilization of the electrode potential after applying the electrode is not more than 2 s, the silver content is 0.1 g.

Claims (1)

An ELECTRODE device containing a dielectric housing in which a dielectric porous contact element saturated with an electrolyte is located, and a collector element, characterized in that, in order to increase the service life, the porous contact element on the side opposite to the working part has a recess on the surface of which a silver layer is applied, connected to the collector element by means of a junction, the part of the porous contact element adjacent to the silver layer is filled with silver chloride and as an electrolyte and- enjoys next composition: wt.%: Water 31–35 Potassium chloride 10-13 Agar agar 2-3 Polyacrylamide 0.5-0.8 Glycerol Rest > 120090!