SU1648360A1 - Electrode for recording biopotentials - Google Patents

Description

one

(21) 4655923/14

(22) 01.31.89

(46) 05/15/91. Bul Number 18

(75) I.V. Blagov and A.L. Krasnorutsky

(53) 615.475 (088.8)

(56) Patent of Germany No. 2912161, cl. A 61 B 5/04. 1979

(54) ELECTRODE FOR REMOVAL OF BIOPOTENTIALS

(57) The invention relates to medical technology and, in particular, to devices recording the bioelectric activity of living organisms. The aim of the invention is to improve the contact of the electrode with the skin that has hair, due to its expansion at the installation site. The electrode is provided with an additional outer casing 6 and two levers 7. One end of each lever is pivotally fixed in the upper part of the main body 1 of the electrode symmetrically to its axis, and the other end, made in the form of a springy comb 9, is bent so that in the initial position of the comb 9 both levers 7 close the lower hole of the electrode. The middle part of each lever 7 has a longitudinal groove 10 through which the lever by means of a pin 11 is connected to the outer case 6. The main body of the electrode 1 has freedom of vertical movement relative to the outer case 6 and is spring-loaded to the upper position. 1 hp f-ly, 4 ill.

The invention relates to medical technology, in particular to devices that record the bioelectric activity of living organisms.

The purpose of the invention is to improve the contact of the electrode with the skin having hair covering due to its expansion at the installation site.

Figure 1 shows the electrode in its initial state; figure 2 is the same, bottom view; FIG. 3 shows an electrode mounted on a patient’s skin; figure 4 - the same, bottom view.

The electrode consists of the main body 1, the contact plate 2 with the outlet conductor 3 connected to it. From the side of the contact plate 2 facing the patient's skin, there is fixed hygroscopic material 4, for example cotton wool impregnated with an electrically conductive compound (electrolyte) .

The hygroscopic material 4 is fixed on the contact plate 2 by means of a rubber thread 5.

The main body of the electrode has a cylindrical shape and is located inside the outer case 6. Two levers 7 are fixed in the upper part of the body 1 by means of hinges 8. The lower part of the levers 7 is made in the form of a springy comb 9. In the middle part of each of the two levers 7 there is a longitudinal groove 10 through which the lever 7 by means of the pin 11 is connected to the outer case 6. The outer case 6 has side walls 12 made of an elastic material, for example rubber. When installing the electrode, the wall 12 of the housing 6 rests on the skin 13 of the patient, covered with hair covering 14. The main electrode lip 1 has the ability to move vertically relative to the outer housing b and is spring-loaded to the upper position from the last

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power rod 15, rigidly connected with the main body 1, and the spring 16.

The electrode can be attached to a common cap for attaching the electrodes either by means of a cord 17 passing through the through hole 18 in the main electrode body 1 and in the outer case 6, or by means of the rod 15.

The electrode is used as follows.

At the first moment when installing the electrode on the patient's skin, the force acting on the main body transmitted through the cord 17 or the rod 15 should not exceed the force of the spring 16, while the position of all parts of the electrode will correspond to the position shown in figure 1, i.e. . The main body 1 of the electrode is in the upper position, and the spring combs 9 cover the lower opening of the electrode. Then, by acting on the harness 17 or rod 15 from the side of the cap or rubber cap that connects all the electrodes, or simply pressing a rod 15 with a finger creates a force exceeding the force of the spring 16 and the main body 1 of the electrode begins to move downward relative to the outer case 6 At the same time, the levers 7 begin to turn around the pins 11, and the spring-like combs 9 begin to diverge in different directions, dragging the hairline 14 behind them.

In the lower position, the main body 1 touches the patient's skin 13, which is peeled from hairline 14, creating electrical contact with it through the hygroscopic material 4 impregnated with electrolyte and the contact plate 2.

In this position, all the parts are fixed by means of the elastic wall 12 of the housing 6, which does not allow the levers 7 to move to their original condition. In order to move the electrodes to the initial state after the end of the measurements and the removal of the helmet, it is necessary to press the housing 1 with a finger or a special tool.

The electrode allows you to create systems for EEG studies, consisting of a large number of sensors mounted on a helmet or cap that do not require a long time to install them, this

the time is limited only by the time when the cap or cap is put on.

Instead of elastic walls 12, which play the role of stops, elastic stops 19 can be used (shown in dotted lines in the drawing).

Claims (2)

1. Electrode for biopotential removal, consisting of the main body with a cavity in which the contact a plate connected to the discharge conductor and a hygroscopic pad for the electrolyte located on the working surface of the contact plate, characterized in that, in order to improve contact of the electrode with the skin, having a hair cover due to its extension to the installation site, the electrode is equipped with an additional outer case and two curved levers hinged at one end in the upper part of the main body of the electrode symmetrically to its longitudinal axis, while the other ends of the levers face each other. friend and located in the working plane of the electrode, and The middle part of each lever has a longitudinal groove in which a pin is located, fixed on an additional outer case connected with the main spring-loaded case with the possibility displacement along the longitudinal axis of the electrode. 2. The electrode according to claim 1, characterized by the fact that the lower ends of the arms are made in the form of springy combs. 7 b 19 2 figure 1 / nineteen FIG. 2 18 Fig 3 Fma