EUROMEDICAHanover23-24 Mai 2011 |
Advanced methods of diagnosis,
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European Academy of Natural Sciences, HanoverEuropean Scientific Society, Hanover |
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| A.S. Karakushikova B.S. Baiserkin K.K. Toguzbayeva Z.D. Bekmagambetova A.A. Lukashev K.S. Mendybaeva L.S. Niyazbekova D.D. Zhunistaev A.K. Sailybekova L.B. Seiduanova |
HYGIENIC CHARACTERISTICS OF VIBRATION EFFECTS ON THE BUS DRIVERS ORGANISM |
| Kazakh National Medical University named after S.D. Asfendiyarov, Almaty, Kazakhstan |
Protecting people from the adverse effects of vibration is one of the most urgent tasks in even the most industrialized countries.
Vibration of jobs on the source of shares for transport, transport-technological and technological. Drivers of motor vehicles subject to general and local vibration. On the jobs transmitted high-frequency jerky vibration indiscriminate nature arising in the course of movement of vehicles on uneven surfaces or moving parts of machinery. In addition, the driver’s workplace, including on the government passed the vibration resulting from engine and transmission.
Prolonged exposure to vibration leads to the development of an organism drivers persistent violations, united by the notion of “vibration disease”. At the combined effects of noise and local high frequency vibration developed peripheral circulatory disorders, which are based on spasm arteries (obliterative endarteritis, combined with hypertension.) Working in the driver’s seat as the local effects (such as the hands and feet) and overall vibration transmitted to the whole body (vibrations seat). Prolonged exposure to vibration affects the quality of attention and precision action.
Vibration disease develops, usually after several years of work. It is very typical complaint numb hands and toes, pain in arms and legs, especially after work and at night, frequent cramps in the fingers, unexpected short-term weakness in the hands, increased sensitivity to the overall cooling of the body and especially the cooling of limbs, disturbance of pain sensitivity of the hands and feet. When expressed forms of the disease is dominated by disturbances of the central nervous system and vestibular system (dizziness, chronic headaches, intolerance to shake). Current study found that the vibration on the driver’s seat is for a broadband random process.
The maximum values of vibration is concentrated in the frequency range 1 to 125 Hz, especially 8.2 Hz. Levels of vertical vibration in the modern city buses have the highest values (up to 135 dB). In marked low-frequency nature of the spectrum.
Characteristics of vibration on the corrected level indicates that the truck he is 108-122 dB at 100-118dB cars, buses - 105 dB. Over the past few years has become very topical problem of hygienic standardization of harmful factors of physical nature, which is the noise, vibration, ultrasound and infrasound in the cabs of drivers of urban transport. As shown, the old regulations should be carefully reviewed and redrafted.
Thus, an analysis of published data and studies have shown that the drivers of urban transport has an impact vibration, which cause serious disturbances in the body of drivers.
In this connection it is necessary to develop a series of preventive measures consisting of technical, sanitary and health-care, and, above all, as noted above, the need to develop new standards of hygienic regulation of vibration.