[Infrasound: body's effects and hygienic regulation]. / Infrazvuk: ego deístvie na organizm i gigienicheskaia reglamentatsiia.

The paper analyzes and sums up technically originated infrasound (IS) hygienic problems. Trends for an increase in its role as an unfavourable factor of the industrial, transport, and residential environments are established. Comprehensive physiological, hygienic, and experimental studies revealed the pathogenetic features of IS. Involvement of the limbicoreticular complex, hypothalamus, and other subcortical structures into responses to higher factor levels on human beings stipulates a sharply prominent pathological discomfort as a manifestation of the infrasonic diencephalic hypothalamic syndrome with sensorisomatic and autonomic visceral symptoms. A conceptual pathogenetic model of IS exposure has been worked out. Main subjective and objective signs of and criteria for IS exposure have been defined, its ranking by human risk areas is given with the influencing factor parameters borne in mind. The biometry of biological effects on exposure to IS at 4 and Hz and at 130 dB and their changes in the vestibular and acoustic analyzers, as well as in the neurohumoral regulation system and other homeostatic parameters has revealed the priority of the whole body's responses.

[Evaluation of occupational diseases according to their risk and severity]. / Kontseptsiia otsenki profzabolevanii po kategoriiam ikh riska i tiazhesti.

Article covers approaches to evaluation and forecasting of occupational risk for workers exposed to occupational hazards, formulates a concept to evaluate occupational disease according to risk and severity categories, gives an integral parameter for qualitative and quantitative analysis of group risk for one occupational disease or their combination. Trials proved acceptability of the method for group risk evaluation according to WHO concept concerning occupational diseases.

[Assessment of occupational risk in industrial medicine]. / Problema otsenki professional'nogo riska v meditsine truda.

Article covers methodic approaches to evaluation of occupational risk for workers exposed to occupational hazards, suggests a concept concerning formation and evaluation of occupational risk, defines risk zones according to the length of exposure. All results can serve as a base for application of information technology to industrial medicine and determine tactics of hygienic and clinical monitoring. Occupational risk was suggested to be evaluated approximately and rapidly by means of length of exposure as an integral parameter. Topical problems were defined within the whole concept.

[Social and hygienic aspects of occupational health risk and resources of protection in time]. / Sotsial'no-gigienicheskie aspekty professional'nogo riska dlia zdorov'ia i rezervy zashchity vremenem.

The article suggests the parameters and criteria to evaluate the grade of occupational risk for health in hazardous work conditions. The parameters include prior hygienic ones, posterior medical and biologic ones. The principles of optimal protection by the time are based on the dose approach taking into account the occupational disease development. The authors describe the method evaluating efficiency of protection by the time with a consideration of the dose range of acting factor. Large protective resources of time are shown and recommendations are given for adequate use of the various forms of protection by time taking into account the workers' age and length of service as well as the work organization.

[Assessment of probability of vibration disease caused by local vibration taking into consideration concomitant factors]. / Otsenka veroiatnosti vibratsionnoi bolezni ot deistviia lokal'noi vibratsii s uchetom soputstvuiushchikh faktorov.

The article sets forth a theoretical basis for the evaluation of the probability of vibration disease caused by local vibration, with due account of the concomitant factors and with recommendations with regard to the assessment of the aggravating and normalizing factors. Basing on the original data and medical literature information, the contributors provided formulae and charts for the assessment of vibration disease, risks caused by noise, cold microclimate, physical overload, and cigarette smoking as an individual factor. A concept was proposed with regard to the risk-free dosage. The concept was viewed as a new hygienic and occupational category, which facilitated evaluating the real occupational risk levels for any profession and their consequent minimizing.

[Physiological and hygienic evaluation of combined effects of harmful factors in metallurgy]. / Fiziologo-gigienicheskaia otsenka sochetannogo vliianiia neblagopriiatnykh faktorov v usloviiakh prokatnogo proizvodstva.

The quantitative assessment of a compound action of hazardous industrial factors in combination with workload with the technique of multiple discrete correlative-regressive analysis, contributes to the evaluation of their relative hygienic involvement along the major functional state indices. The results proved to be indispensable for the substantiation and elaboration of preventive measures.