【摘 要】
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This paper reviews the interventions to stabilize calcium balance and bone metabolism and prevent bone loss in astronauts during weightlessness and simulated weightlessness.Weightlessness during space
【机 构】
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Space Medicine & Medical Engineering,Beijing 100094,China
【出 处】
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第六届国际骨矿研究学术会议暨第八届国际骨质疏松研讨会
论文部分内容阅读
This paper reviews the interventions to stabilize calcium balance and bone metabolism and prevent bone loss in astronauts during weightlessness and simulated weightlessness.Weightlessness during spaceflight results in calcium,vitamin D,and vitamin K deficiency,increases urinary calcium excretion,decreases intestinal calcium absorption,and increases serum calcium level,with decreased levels of serum parathyroid hormone and calcitriol.Bone resorption is increased,whereas bone formation is decreased.The loss of bone mineral density (BMD) in the spine,femoral neck and trochanter,and pelvis is 1.0-1.6% per month.
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