高空缺氧高空缺氧永远是航空医学和宇宙医学根本问题之一。高空缺氧的原因是因为上升高空后,吸入气中的氧分压随大气压的下降而降低,以致肺泡气中的氧分压下降,在单位时间内没有足够的氧由肺扩散到血液中去,血液形成缺氧,从而发生组织缺氧。机体组织对缺氧最敏感的是中枢神经系统,其中尤以大脑皮层对缺氧的耐力最弱。这是由于皮层细胞在组织结构上的高度分化,机能上的高度专门化,皮层细胞需氧量特别大,以及它本身又缺乏重要能源物质的储藏所致。皮层细胞缺氧后,势必使机体的整个机能发生障碍,障碍的轻重则直接决定于缺氧的程度。高空缺氧所引起的症状是相当复杂的,总的说来,缺氧对机体主要是抑制作用,特别是对中枢神握系统 Hypoxia Hypoxia is always one of the fundamental problems of aeromedicine and cosmology. The reason for high altitude hypoxia is because after rising at high altitude, the partial pressure of oxygen in the inhaled gas decreases with the decrease of atmospheric pressure, so that the partial pressure of oxygen in the alveolar gas drops and there is not enough oxygen diffused into the blood from the lungs within the unit time , The formation of hypoxia in the blood, resulting in tissue hypoxia. Body tissue is the most sensitive to hypoxia in the central nervous system, especially in the cerebral cortex of the weakest endurance of hypoxia. This is due to the highly differentiated cortical cells, their high degree of functional specialization, the particularly large amount of oxygen required for cortical cells, and their lack of storage of important energy sources. Hypoxic cortical cells, the body will inevitably affect the overall functioning of the disorder, the severity of the disorder directly determines the extent of hypoxia. High-altitude hypoxia caused by the symptoms are quite complex, in general, hypoxia on the body mainly inhibitory effect, especially on the central nervous system