["Biological weapons"--the return of epidemics?].
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Biomedical subjects
Publications and source records attributed to H S Fuchs.
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The inauguration of NASA of the position of Payload Specialists for SHUTTLE-SPACELAB flights has broken the tradition of restrictive medical physical standards in several ways: by reducing physical requirements and extensive training; by permitting the selection of older individuals and women; by selecting individuals who may fly only one or several missions and do not spend an entire career in space activities. Experience with Payload Specialists to be gained during the forthcoming SPACELAB missions, observing man in spaceflight step by step on an incremental basis, will provide valuable data for modifying the medical standards for Payload Specialists, Space Station Technicians, and Space Support Personnel who perform routine work rather than peculiar tasks. Such revisions necessarily include a modification of traditional blood pressure standards. In this paper I review the history and evolution of these standards in aeronautics and astronautics.
Although blood pressure standards in aircrew members have been revised periodically over the past 70 years, hypertension still remains one of the most controversial problems in aviation medicine. Improved clinical knowledge and operational experience vindicate a more liberal attitude for acceptable blood pressure levels. Applicants for flying training presenting labile hypertension may be accepted. Also, experienced, older aircrew with benign hypertension controlled by drugs without adverse reactions and without target organ disease may remain on flying status. In order to avoid compromising flight safety, long-term monitoring of flight crew for the diagnosis of hypertension together with the evaluation of anti-hypertensive drugs in aircrew is urgently required.
In the space flights by the USA and USSR to date adequate experience has been obtained on the adaptation of man to living conditions in space--with the technical assistance of an artificial protective atmosphere in the space ship or space suit--and to the singular factor of "weightlessness" (microgravity, low gravity) and how he re-adjusts again after returning to a gravitational field. There is no ultimate or absolute physiological barrier for long term space flight--with one exception: decalcification of the skeleton. For short space flights, however, space sickness is a serious disorder.
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