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在减压舱中对16名对象的低氧耐力进行了预测。受试者的低氧耐力显示出明显的个体差异。在减压舱内上升到7000m以上者定为低氧耐力好的Ⅰ组(8人),其余为低氧耐力一般或较差的Ⅱ组(13人)。在6000m,平均动脉血氧饱和度开始出现显著差异,Ⅰ组为78.2±13.5%,显著高于Ⅱ组的57.4±14.5%,P<0.05。动脉血氧饱和度下降是低氧引起的最早反应之一,是一个识别人体缺氧程度和低氧耐力的敏感指标。血压、心率也有显著变化。上述受试者在实际登山中的表现与减压实验所见一致。减压舱试验有一定危险性。本组试验结果表明受试者的缺氧状况在中止试验时已达到人体所能耐受的“次最大限度”。更严重的低氧对揭示人体的低氧耐力并无更大的意义。
Hypoxic endurance of 16 subjects was predicted in the decompression chamber. Hypoxic endurance in subjects showed significant individual differences. In the decompression chamber rose to 7000m or more as hypoxia endurance good group I (8), and the rest for the general or poor hypoxia endurance group Ⅱ (13). At 6000m, mean arterial oxygen saturation began to show a significant difference, with 78.2 ± 13.5% in group Ⅰ and 57.4 ± 14.5% in group Ⅱ (P <0.05). Arterial oxygen saturation is one of the earliest responses to hypoxia, a sensitive indicator of hypoxia and hypoxia tolerance in humans. Blood pressure, heart rate also have significant changes. The performance of the above subjects in actual mountaineering is in agreement with the decompression test. Decompression chamber test has a certain risk. The results of this group of tests showed that the hypoxic condition of the subject reached the “submaximal” tolerated by the human body at the time of suspension of the test. More serious hypoxia to reveal the body’s hypoxia tolerance and no greater significance.