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目的 :探讨高原地区健康汉、藏族儿童肺动脉压的变化特点。方法 :应用美国HP85 0 0和CAL - 16 3多普勒超声诊断仪测定海拔 370 0m地区 2 76例健康汉、藏族儿童的右室收缩时间间期 (RSTI)和进行肺动脉平均压 (PAMP)的估测并作对比分析。结果 :海拔 370 0m 3岁及 3岁之前各年龄段与 3岁之后各年龄段的PAMP比较明显升高 ,差别有高度显著性 (P <0 .0 0 1)。移居汉族和世居藏族动脉血氧饱和度 (SaO2 )、RSTI及PMAP比较差别无显著性 (P >0 .0 5 )。结论 :儿童期在高原低氧环境下种族对肺动脉压变化影响不明显。高原低氧环境是影响儿童肺动脉压变化的主要因素
Objective: To investigate the changes of pulmonary arterial pressure in healthy Han and Tibetan children in plateau area. Methods: The right ventricular systolic time (RSTI) and mean pulmonary artery pressure (PAMP) were measured in 276 healthy Han and Tibetan children at 370 m altitude in the United States using HP85 0 and CAL - 16 3 Doppler ultrasonic diagnostic apparatus. Estimate and make comparative analysis. Results: The elevation of PAMP in 3 years old and 3 years old before the age of 3 years and 370 years old was significantly higher than that of 3 years old, the difference was highly significant (P <0.01). There was no significant difference in arterial oxygen saturation (SaO2), RSTI and PMAP among immigrant Han and native Tibetans (P> 0.05). Conclusion: Race in the plateau in hypoxia environment, the impact of race on pulmonary arterial pressure is not obvious. High altitude hypoxic environment is the main factor affecting children’s pulmonary arterial pressure