大型复合低压舱模拟海拔高度稳定性和准确性验证研究

Validation research of simulated altitude stability and accuracy for large composite low pressure chamber

目的:验证大型复合低压舱模拟海拔高度的稳定性和准确性。方法:(1)验证稳定性:将153名健康人员分为15组,每次进入舱内一组。使用指式脉冲便携式血氧饱和度检测仪分别在9个不同海拔高度上记录个人的血氧饱和度值,对同一海拔高度的15组数据进行单因素方差分析。(2)验证准确性:实验组、文献对照组Ⅰ、文献对照组Ⅱ、文献对照组Ⅲ中,每组包含6个海拔高度的血氧饱和度值。对4个组分别作回归分析,应用回归方程计算出每组对应海拔高度缺失的理论血氧饱和度值,在此基础上作组间的相关分析。结果:(1)在舱内每一模拟高度上,15组健康人员的血氧饱和度值的组间差异不显著(P>0.05),表明该舱在模拟这9个海拔高度时运行稳定;(2)实验组与文献对照组Ⅰ、文献对照组Ⅱ、文献对照组Ⅲ在不同海拔高度血氧饱和度值的相似度分别为0.991、0.990、0.999,说明该舱模拟不同海拔高度时健康人员的血氧饱和度值与在自然环境中的相同海拔高度时是相似的,表明大型复合低压舱模拟的海拔高度是准确的。结论:在模拟高原海拔高度时,大型复合低压舱运行稳定,能够准确模拟自然海拔高度,表明该舱能够满足在基础研究、医学诊断和治疗及高原生理学、高原运动训练和高原设备试验中重复性好、误差小的要求。

Objective To verify the simulated altitude stability and accuracy for large composite low pressure chamber. Methods When the stability was verified, 153 healthy volunteers in 15 groups went into the chamber in turn, and the values of blood oxygen saturation were measured with the portable finger-clamping Sad2 meter at 9 altitudes, and the 15 sets of data at the same altitude went through one-way anova analysis. When the accuracy was verified, 4 groups of experimental group, literature control group I , literature control group It and literature control group Ⅲ involved respectively the Sad2 values at 6 altitudes, and regression analyses were performed for the four groups respectively, and the theoretical SaO2 values of each group for corresponding altitudes were calculated with the regression formulation, and then inter-group correlation analyses were carried out. Results There were no significant differences between the Sad2 values at different altitudes, with P〉0.05, and the chamber proved its stability in simulating 9 altitudes. The similarity degrees of the experimental group for the literature control group Ⅰ , literature control group Ⅱ and literature control group Ⅲ were 0.991, 0.990 and 0.999 respectively, and then the accuracy of the chamber was verified for simulating the altitudes. Conclusion The chamber shows its stability and accuracy in simulating different altitudes, and can be used for basic researches, medical diagnosis and treatment, high altitude physiology researches, high altitude sports training and equipment experiment for high repeatability and low error.