A sedimentation technique for cytologic study of CSF was compared with the standard cytocentrifugation method. Seventy-five samples from 37 children with leukemia and non-Hodgkin's lymphoma were processed by both methods. Total yield of cells and cytomorphology with differentials were analyzed. The techniques are comparable and both allow good cytologic study of the CSF even with very low cell counts/mm3. The sedimentation method can be used as an alternative, especially if a cytocentrifuge is not available. When both methods are used, the possibility of negative cell yield is decreased.
Medical prophylaxis for Swiss nuclear workers is prescribed by law, as for all other persons occupationally exposed to radiation. Medical examinations including questions about the personal history, a physical examination and blood counts take place on entering the job and each year thereafter. Follow-up after leaving the job is not done. With the coming new legislation, medical prophylaxis will be better adjusted to the latest requirements.
The group of occupational medicine of the Swiss Accident Insurance Fund (Suva) fulfills functions of standardizing, e.g. setting TLVs, of insurance medicine, i.e. judging cases of occupational disease and, to a great extent, of medical prevention. By means of 100,000 examinations per year and 40 programs, 330,000 employees in 20,000 enterprises are attended. This is not a general provision of public health, but a specific prevention of occupational diseases. The examinations of aptitude at the time of engagement and in periodical controls, help to clarify the fitness for certain dangerous occupations and to detect potential early stages of occupational diseases.
The Swiss National Accidents Insurance Fund (Schweizerische Unfallversicherungsanstalt, Suva) not only has to pay in case of injuries (of both occupational and nonoccupational nature) and occupational disease, an essential duty given by law (Kranken- und Unfallversicherungsgesetz, KUVG) is the prevention of work accidents and occupational disease. The Suva department for Prevention of Accidents (Abteilung Unfallverhütung) is responsible for technical measures; the occupational physicians of the Suva Medicine department (Medizinische Abteilung) are carrying for the medical prevention of occupational diseases which is the item here explained in detail. In 1977, the medical prevention was extended ot a total of 236,000 insured workers. (Of the almost 2.7 million workers and employees 1.7 million are insured by the Suva.) The legal basis, the kind of prevention done and its organization are described.
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