[Infrasound: body's effects and hygienic regulation].

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.

[Social and hygienic aspects of occupational health risk and resources of protection in time].

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.

[Evaluation of occupational diseases according to their risk and severity].

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].

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.

[Assessment of probability of vibration disease caused by local vibration taking into consideration concomitant factors].

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.

[Physiological and hygienic evaluation of combined effects of harmful factors in metallurgy].

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.