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本文观测了生活在4700m高原藏系绵羊的肺动脉压、体循环压、红细胞压积、血气分析、左/右心室比值等指标变化。结果表明①生活在此高度的藏羊红细胞数较多而血红蛋白、红细胞压积较低,这种血红蛋白与红细胞比例失调的现象,提示有小型红细胞的倾向。②肺动脉压在高原缺氧作用下发生一定程度的增压反应,表现为肺动脉高压。③藏系绵羊的PaO_2在同海拔高度没有普通绵羊下降明显。以下结果提示藏系绵羊在高原低氧环境中的反应与高原鼠兔和牦牛不同,说明不同种属的生物并不是以一种固定方式来适应高原,而是通过各种途径和方式来取得对高原的最佳适应。
In this paper, changes of pulmonary arterial pressure, systemic pressure, hematocrit, blood gas analysis, left / right ventricular ratio and other indicators were observed in 4700m Tibetan sheep. The results showed that ① the number of Tibetan sheep with more red blood cells and the lower hemoglobin and hematocrit at this height, the imbalance of hemoglobin and erythrocytes, suggesting the tendency of small red blood cells. Pulmonary arterial pressure in the plateau hypoxia occurred under a certain degree of pressure response, manifested as pulmonary hypertension. Tibetan Pao2 sheep at the same altitude without ordinary sheep decreased significantly. The results below suggest that the response of Tibetan sheep to plateau hypoxia is different from that of plateau pika and yak, indicating that organisms of different species do not adapt to the plateau in a fixed way, but are obtained through various ways and means The best adaptation of the plateau