Biomedical subjects
Publications and source records attributed to Iu P Syromiatnikov.
The authors demonstrated that workers servicing calutrons (electromagnetic isotope separators) are exposed to direct-current field with high magnetic flux density (the values near the circuit reaching 0.175 T). The examinees with longer length of service (and exposure to the magnetic fields) tended to have more structural disorders in peripheral leukocytes.
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It was established that, during the working shift, female transistor equipment assemblers were affected by periodic multiple short-term impulses of direct magnetic field (DMF) which was locally confined to the hand (with the field tension 35 kA/m at the finger-tips and 15 kA/m at the wrist). Local prenosologic manifestations were detected in females in the age group of up to 35 years with 1-10 years of length of work, which proved blood circulation vegetative disorders in upper extremities (arteriole-capillary vasoneurosis). A study of morbidity with temporary disability was made (at 100 cases per year ratio), which cindicated to markedly higher morbidity rate as compared to the sample group. The difference in morbidity rate between these two groups was accounted for by hypertensive vegetovascular disorders and 1-2 stages of HD. The data received necessitates the earliest norming of localized (limited to the hand) direct magnetic field influence.
The data on biologic effect of constant magnetic fields (CMF) of various intensity were presented. It was shown that animals (white rats) exposed to CMF of 1600-400 kA/m experienced moderately distinct functional changes, manifested by raising excitability of the CNS spinal sections, hypothermic reactions and variations in some blood indices. CMF of 80 kA/m and lower produced no unfavorable effect on animals. It was supposed to use the obtained data in the improvement of CMF hygienic standardization.
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Results of outpatient examination of wood fellers are presented. It has been shown that their work associated with vibration, body cooling and great tension of hand muscles leads to development if vibrational disease which is characterized by polymorphic clinical symptoms (vegetative polyneuritis and vegetomyofasciitis of hands combined with the angiodystonic syndome; peripheral angiodystonic syndrome; degenerative-dystrophic changes in the bones). Clinical manifestations of the earliest forms of the vibrational disease are specified. A set of diagnostic tests is suggested, the use of which is recommended for periodic examinations with the purpose of diagnosing the disease and developing measures for its prevention.
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