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为了比较高原世居藏族与移居汉族氧传送和利用的特点 ,在海拔 3 417m高原测定了 17名当地世居藏族和 19名移居汉族在静息和运动状态下的通气、循环、代谢和气体交换状况。结果显示 ,静息状态下 ,两组测定的各项参数均无显著差异 ;但在最大运动时 ,世居藏族的最大运动负荷 VEmax、CO、SV以及 VO2 max均明显高于移居汉族 ; VO2 max与COmax呈中度相关 (r =0 .6 8,P <0 .0 1)。虽然藏汉族之间在静息状态及中度运动负荷时 ,SaO2 无明显差异 ,但随运动负荷的进一步增加 ,差异变大 ,在最大运动负荷时 ,藏族仍能维持较高水平的SaO2 。结果显示 ,青藏高原世居藏族氧传送和利用的能力明显强于汉族人群 ,这可能也是他们取得对高原低氧环境最佳适应的主要原因。
In order to compare the characteristics of oxygen transmission and utilization among native Tibetan and migrant Han population in plateau, the elevations, circulations, metabolism and gas exchange of 17 native Habitat and 19 immigrant Han were measured at 3 417 m above sea level situation. The results showed that there was no significant difference between the two groups in resting state. However, the maximal exercise load VEmax, CO, SV and VO2 max of the native Tibetans were significantly higher than that of the migrants at maximum exercise. VO2max There was a moderate correlation with COmax (r = 0.68, P <0.01). Although there was no significant difference in SaO2 between resting and moderate exercise load among Tibetans and Han nationality, the difference became larger with the increase of exercise load. At the time of maximum exercise load, SaO2 remained at a high level. The results showed that the ability of native Tibetan Oxygen transmission and utilization in the Tibetan Plateau was significantly stronger than that in the Han population, which may also be the main reason for their best adaptation to the low-oxygen environment in the plateau.