Action on an organism of electromagnetic radiation

In a number of manufactures currents of high frequency are used. Thus workers can be exposed to influence of various kinds of radiant energy, including electromagnetic waves of radio frequencies (broadcasting, TV, medicine). Electromagnetic radiation characterise on length of a wave and frequency of fluctuations.

Electromagnetic waves of high and ultrahigh frequencies are applied at thermal processing of metals (training, napajka, fusion, etc.), plastic, in a radio communication, physiotherapy etc. Superhigh-frequency electromagnetic waves are used in a radar-location, radio astronomy, radio relay communication lines etc.

Sources of electromagnetic radiation. Electromagnetic waves of radio frequencies are created by lamp generators which will transform energy of a direct current to energy variable the high frequency, differing from an industrial current frequency. Electromagnetic fields of high and ultrahigh frequency are created in a working premise neekranirovannymi by elements of an oscillatory contour, high-frequency transformers, batteries of condensers. The basic sources of radiation of energy of ultrahigh frequency in a working premise are scanners.

At work in the conditions of influence of electromagnetic waves of radio frequencies functional infringements of nervous and cardiovascular systems are possible. So, in a radar-location, radio navigation, radio relay communication lines and other scopes of generators of ultrahigh frequencies all can be exposed to an irradiation being in a premise where are made adjustment, adjustment, test of sending devices. Thus at workers sosudisto-vegetative infringements of various degree of expressiveness, a sconce-dikardija, a hypotension can develop asthenic simptomokompleks. From blood the changes expressed lejko - and a thrombocytopenia, relative limfotsitozom and retikulotsitozom also are appreciable. Increase of sensitivity of some analyzers is marked.

In chronic influence of electromagnetic waves of radio frequencies distinguish three stages: initial, moderately expressed and expressed. First two are characterised by development asthenic simptomokompleksa, combined with sosudisto-vegetative shifts. The long and intensive irradiation MICROWAVE WAVES can lead to infringement of a vascular tone and development gipotalamicheskogo a syndrome. Such changes in a human body lead to proof decrease in work capacity. With increase in the experience of work in the conditions of influence of electromagnetic radiation clinical displays become more expressed.

Intensity of electric field is measured in voltah on metre (V/m), a magnetic field - in amperes on metre (A/m).

Measures of protection from electromagnetic waves of high and ultrahigh frequency on workplaces it is recommended two types of protection: 1) shielding by sheets of aluminium or iron of the high-frequency elements which are sources of electromagnetic fields on workplaces (the battery of condensers, the Vch-transformer, melting induktor, feeding lines); 2) shielding of all installation of the high-frequency generator, except induktora which together with a control panel is taken out on an external surface of the screen.

Decrease in intensity Vch UVCH-FIELDS in halls of transmitters of radio-and television stations is observed at the device of remote control by transmitters and premise shielding.

In a range of ultrahigh frequencies reduction of radiation by absorption of energy SVCH in special absorbers of capacity, use of the co-ordinated loadings is recommended. The good effect gives application of metal continuous or mesh screens, and also screens with an absorbing covering, workplace shielding, removal of a workplace from a radiation source, use of special points.

The Great value in the prevention of influence of radiation of radio frequencies has also rational placing in a working premise of the equipment radiating electromagnetic energy, an establishment of rational modes of work and rest of attendants, application of means of the warning alarm system (light, sound).

The Important role in preventive maintenance of an irradiation by waves of radio frequencies is played also preliminary and the periodic medical inspections spent according to order MZ the USSR в„– 700 from 19.06.84 ' About carrying out obligatory preliminary at receipt for work and periodic medical inspections of workers, harmful influence harmful and adverse working conditions exposed to influence ' according to which work in the conditions of influence of electromagnetic fluctuations (fields) is counter-indicative to the persons, suffering hypertensive illness, by stenocardias, to it, a cataract.