Gigiena truda i professional'nye zabolevaniia最新文献

Grounded and worded concept stresses that the intensity of regulating mechanisms must be taken into account in evaluating the difficulty and intensity of work, criteria of intensity are suggested. Growth of intensity index, centralized administration or considerable number of correlations (above the average on the whole industry) and more synchronized functions during the work improve the intensity of work by one step above the results of the simple physiological evaluation of work intensity.

Cytochemical parameters of peripheral neutrophils were studied in the experimental pattern of combined action of chlorine and phosphorus containing organic pesticides and different levels of dynamic physical strain. Studies revealed the protective effect of the minimal physical strain and aggravating effect of the moderate and maximal strain leading to the depressed aerobic oxidation and increased anaerobic glycolysis.

The general morbidity and transitory disablement in workers engaged into superphosphate production was assessed in connection with age, sex and length of service. The results proved its possibility to serve as informative criteria for the hazardous occupational conditions evaluation.

The incidence of diseases of the peripheral nervous system was studied during the voyage in different groups of sea sailors. The diseases due to overcooling and overexercise (cervico-thoracic and lumbosacral radiculosis) appeared to predominate. Methods of electroneurostimulation of acupuncture points and reflexogenic zones, lymphotropic therapy were used in the treatment administered on board the ship.

Hearing stability was measured by the method using physiologic dependence: the better were body possibilities to resist the unfavourable effect of acoustic environment, the higher was the tolerance threshold. Hearing stability measured by the suggested method appeared to be an individual stable characteristic that can be predicted.

Cytogram of pulmonary lavage fluid was studied in 50 workers al risk of developing silicosis. Workers with long length of service showing no radiographic signs of silicosis had normal cytogram of pulmonary lavage fluid, except for slightly increased neutrophil counts. Cytogram of patients with first recognized silicosis were characterized by elevated lymphocyte count. Neutrophil level increased in chronic silicosis. Cytogram of pulmonary lavage fluid is considered valuable for the diagnosis and prognosis.

P proteins were just obtained from white rats and a method to testify them with the help of highly stable anti-P serum was worked out. Normal titres of P proteins are 1:1600 and 1:3200. Different models of sensitisation to the industrial allergens (delivered intracutaneously, by inhalation, into trachea in various doses and concentrations) were used in trials of the method. P protein level appeared to correlate with the sensitisation degree estimated by specific allergy tests. The highest P protein titer is due to the toxic allergic conditions (up to 1:102400), the minimal to sensitization of threshold (up to 1:12800) level. Provocative inhalation test in sensitized rats induced an increase of P protein titer as delayed hypersensitivity was forming.

Investigations of arterial and venous circulation in the shin, analysis of work hyperemia and venous pump mechanisms have shown, that regional hemodynamics depends on the position of the lower limbs. The optimal initial position for special exercises intensifying the venous outflow is sitting with raised, slightly flexed legs, with the shin on the level of the heart. Sitting with flexed knees and vertical shin is less advisable for prophylaxis.

The functional status and capacity for work were studied in humans exposed to the combined occupational and natural (everyday mountainous migrations) factors. Occupational factors and vertical migration appeared to effect synergistically on functional systems, which necessitates the further investigations concerning the work normalization in mountainous conditions.