POLYGRAPH — the multichannel device for simultaneous record of various physiological processes at a complex research of all organism or its separate systems (breath, blood circulation and other systems).
The item consists of the oscilloscope allowing to observe and to estimate visually investigated biol, signals, the mainframe counted on simultaneous use 3 — 16 (depending on type of the device) diagnostic blocks (modules), a set of these blocks (their number and set depend on type P.), the multichannel registrar, the electrical power unit, a set of cables of assignment, sensors, electrodes and laying for their storage (fig).
The item can replace multichannel electrocardiographs (see. Elektrokardiografiya ), phonocardiographs (see. Fonokardiografiya ) and other multichannel devices used for registration of physiological processes. It is applied at polycardiography (see), at the same time carried out a phonocardiography and an electrocardiography, during the definition of rate of propagation of the pulse wave registered on two sphygmograms (see. Sfigmografiya ) or reogramma (see. Reografiya ) etc., at a torakospirografiya and a hronokardiografiya for studying of dependence of length R — R intervals of an ECG from breath, carrying out differentiation nek-ry biol, signals for determination of speed of their change.
The program of a research forms by means of the built-in programming system or installation of necessary diagnostic blocks (modules) in the mainframe.
In the USSR P. of a standard row providing a possibility of simultaneous carrying out an electrocardiography (are most widespread on four or six channels), a phonocardiography, a direct and volume sfigmografiya, a reografiya (on 2 channels at the same time), hronokardiografiya, torakospirografiya, an electromyography and an electroencephalography, and also registration of a skin and galvanic reflex, etc. Blocks of roughing-out of information make calculation and digital indication of pulse rate or cordial reductions and a respiration rate.
Domestic P. of a standard row are divided by number of at the same time conducted researches and on number of channels of registration on 4-, 6-and 8-channel.
See also Printing method .
Bibliography: Karpman V. L. Phase analysis of cordial activity, M., 1965, bibliogr.; Gunner Yu. T., etc. Polygraphs of a standard row — new electronic diagnostic complexes, Rubbed. arkh., t. 51, No. 5, page 86, 1979; Smerdov A. A., etc. Possibilities of use of an electronic polygraph for complex functional researches, in the same place, t. 49, No. 10, page 64, 1977; T and-shch e of N to about A. G. and Schuster L. A. Rol of polygraphs in complex equipment of departments of functional diagnosis, the Medical technician, No. 1, page 44, 1981.
A. G. Tyshchenko.