ANAESTHESIA WITH OBSTRUCTED AIRWAY; REMOVAL OF AN UNUSUAL FOREIGN BODY FROM THE LARYNGO-PHARYNX.
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Biomedical subjects
Publications and source records attributed to E B LEWIS.
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A survey of 425 death certificates of radiologists dying between the ages of 35 and 74 during the years 1948 to 1961 reveals a statistically highly significant excess of deaths from leukemia, multiple myeloma, and aplastic anemia. That this excess is due to radiation exposure (or to some factor acting in a similar manner), rather than to an artifact of diagnosis is suggested by the absence of deaths ascribed to chronic lymphatic leukemia.
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Leukemia in man can be induced by ionizing radiations and also occurs spontaneously. For the "average" individual in a population, the probability of developing radiation-induced leukemia is estimated to be 2 x 10(-6) per rad (unit of absorbed dose of radiation) per year. The available data from four independent sources make it likely that this estimate is valid within a factor of about 3, giving a range from 0.7 x 10(-6) to 6 x 10(-6) per rad per year. It is pointed out that 10 to 20 percent of the spontaneous incidence of leukemia (Brooklyn, 1943-52) may result from radiation from natural background sources. It is estimated that a 5- to 10-percent increase in the current spontaneous incidence of leukemia would occur if the population were to reach and maintain a body level of Sr(90) amounting to one-tenth of the "maximum permissible concentration."
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