SU1680072A1 - Electrode device - Google Patents

Abstract

The invention relates to medical technology and can be used in the study of human hemodynamic parameters by tetrapolar rheography. The purpose of the invention is to simplify the design and increase the accuracy of measurements. The invention consists in making working electrodes 2 and 3 in the form of printed conductors located on a flexible dielectric base 1, on the other side of which there is an additional printed conductor 4 covering the area between the working electrodes. Conductor 4 is connected to the braided shielding of the connecting cable 10. Transverse cuts are made on the printed conductors. In the proposed device, at the same time as the construction is simplified, the accuracy of measurements during examinations is increased due to the tight fit of the electrodes with a fixed distance between them 7 or more.

Description

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The invention relates to medical technology and can be used in the study of human hemodynamic parameters using tetrapolar rheography.

The purpose of the invention is to simplify the design and increase the accuracy of measurements.

FIG. 1 and 2 shows the device, a general view; in fig. 3 - the relative position of the printed conductors on a dielectric base; in fig. 4 and 5 are examples of the implementation of the slits, respectively, on the working electrodes and on the additional printed conductor; in fig. 6 and 7 is an example of the location of a device on a limb.

The device contains a flexible dielectric base 1, for example, from a polyimide of the PF-2 grade, TU 16-503.208.81 with a thickness of 0.17 mm (Fig. 1 and 2). The base 1 has a thickness h (Fig. 3) that is the same throughout its length. On the underside of the base 1, at a distance a, the printed conductors 2 and 3 are located, which are the working electrodes of the device (Figs. 2, 3 and 4). Conductors 2 and 3 are predominantly equal widths. The width of each of the working electrodes 2 and 3 is chosen from the condition of achieving the required area of contact of the electrodes with the skin (usually not less than cm2). The distance a is usually chosen not less than 10 mm. The width d of the base 1 is equal to or slightly larger than the distance between the outer edges of the electrodes 2 and 3 (Fig. 4). The working length of the electrodes 2 and 3 (Fig. 1) is preferably chosen to be shorter than the circumference of the part of the body on which the device is located.

An electrode 4 (printed conductor) is located on the upper side of the base 1.

The electrode 4 overlaps the area located between the working electrodes 2 and 3.

Electrode 4 can not only overlap the area between electrodes 2 and 3, but also these electrodes themselves. To increase flexibility, electrode 4 is made with slots 5 and 6 (see Fig. 5).

The length of the conductor 4 (Fig. 2) is chosen equal to or less than I of this length, since at the end portions of the device the fixation of distance a is provided with clamps 7. The clamps 7 are covered with the ends of the base 1 with working electrodes 2 and 3 and are glued to it. Electrodes 2-4 are covered with solder using standard technologies used in the manufacture of printed circuit boards. Cables 7 conductors are sealed to electrodes 2 and 3, connecting electrodes 2 and 3 with a reograph, a braid of connecting cable 7 is soldered to electrode 4 by a conductor.

The device also contains an elastic rubber band 8 with holes 9, threaded through clamps 7. On the tape 8 there is a locking element 10, made in

particular in the form of a button. Other solutions, such as textile fasteners, can also be used as a fixing element.

When performing tetrapolar reography, the proposed devices are mounted on the borders of the patient's 11 section under study and their position is fixed with the help of a tape 8 and element 10 (Fig. 6 and 7). Electrodes 2 and 3 fit snugly against the studied limb with a strictly fixed distance between them. The working electrodes closest to each other are connected to a potential rheograph circuit, and the other electrodes are connected to its current circuit (FIG. 6).

Thus, the use of the proposed technical solution allows to significantly simplify the design of the device by eliminating sections, hinges and folds of tape electrodes and

5 applications of non-deficient materials, and developed technological processes. Low manufacturing cost, simplicity of design and application are of great importance when conducting mass

0 population surveys. Simultaneously with the simplification of the design of the proposed devices, the reproducibility of the examination results is increased due to the tight fit of the electrodes with a fixed distance between them.

High technical and operational characteristics allow using the developed electrodes during long continuous

0 control over the status of operators of various kinds of activity, t patients in the intensive care unit and intensive therapy, in sports and space medicine. In addition, the use of the proposed

5 of the technical solution allows to expand the area of application of the electrodes by providing reliable registration not only when removing the peripheral and integral rheogram of the body, when the electrodes

0 superimposed on the limbs of the patient, but also the thoracic rheogram when applying electrodes to the neck and chest of the subject.

Claims (1)

Invention Formula 5 Electrode device for tetrapolar rheography, containing working electrodes in the form of strips of electrically conductive material, connected to the output conductors and located on a dielectric base, differing from that. that, in order to simplify the design and increase the accuracy of measurements, the paired electrodes are made in the form of two printed conductors located on a flexible dielectric base parallel to the longitudinal axis of the device, on the opposite side of the base is an additional printed circuit / 3 kkxfflxra / v6646 & Y & 41 | them ™ / FIG. J / JU pppgy uyuu u 2 FIG. The conductor, which is connected to the shielding braid of the diverter cable, whose width overlaps the area between the working electrodes, with transverse slots in the working electrodes in the additional conductor, the length of which is less than the width of the corresponding printed conductors. / / Z Fig / Who is a chain H potential chain Chain circuit eight FIG. 6 T Yu 7 FigL