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目的 :研究青年士兵高原现场作业过程中的血气变化规律。方法 :将来自海拔 80 0m以下的青年士兵分为非军事作业组和军事作业组。按海拔高度分为 2 90 0m组、32 0 0m组、4 40 0m组、5 0 6 0m组。采用阶梯式进驻作业现场 ,对比观察相同、不同高度的血气酸碱变化趋势。结果 :作业和非作业状态中心动脉血气 ,PaO2 ,PaCO2 ,HCO3- ,PAO2 ,A -aDO2 等参数均随海拔高度上升出现不同程度变化 ;相同高度 (44 0 0m)军事作业组的上述参数与非军事作业组相比差异显著 (P <0 0 5 ,P<0 0 1) ,但pH值在 4个梯度无统计学差异。结论 :青年群体阶梯式进驻高原现场作业 ,中心动脉血气和酸碱变化显著 ,明显异于非作业组 ,大部分符合呼吸代偿性酸中毒标准 ,个别病例也接近呼酸代酸标准。在海拔高度 4 40 0m以上作业状态下 ,PaO2 ≥ 4 5mmHg ,SaO2 ≥ 0 8,7 30≤pH≤ 7 4 8,可能是作业状态可允许的最大限值。
Objective: To study the changes of blood gas during the field operation of young soldiers on the plateau. Methods: Young soldiers from an altitude below 80m are divided into non-military operations and military operations. According to the altitude, it is divided into 2 90 0m, 32 0 0m, 4 40 0m and 5 0 6 0m groups. Stairway stationed in the job site, compared to observe the same, different levels of blood gas acid-base change trend. Results: The parameters of PaO2, PaCO2, HCO3-, PAO2 and A-aDO2 in the center of working and non-working status all changed with different altitude. The above parameters of military operation group with the same height (4400m) There were significant differences between the military operation group (P <0.05, P <0.01), but there was no statistical difference in the four gradients of pH value. CONCLUSION: The young group stepped into the plateau for field work step-by-step with obvious changes of central arterial blood gas and acid-base, which were significantly different from those of non-working group and most of them met the standard of respiratory compensatory acidosis. In the working condition above 4 40 0m above sea level, PaO2 ≥ 4 5mmHg, SaO2 ≥ 0 8,7 30≤pH≤ 7 4 8, may be the maximum allowable working state.