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目的:观察乘火车初次进入西藏地区的旅客在高原不同海拔高度的血压、心率、血氧饱和度及心电图的变化。方法:选择由上海、广州、北京、成都方向乘火车初次进入西藏地区的身体健康旅客440名(脱落24例),分别依次观察其在海拔2 800米、4 200米、4 600米、5 100米、4 500米、3 600米左右时的血压、心率、血氧饱和度及心电图的变化,并分别与海拔2 800米时进行比较。结果:血压、心率、血氧饱和度分别在不同海拔高度与海拔2 800米时比较有非常明显的统计学差别(P<0.01);各海拔高度的心电图异常率与海拔2 800米时比较也有非常明显的统计学差别(P<0.01)。结论:乘火车进入西藏地区的旅客,血压、心率随着海拔高度的增高而增加,随着海拔高度的降低而下降;血氧饱和度随着海拔高度的增加而降低,随着海拔高度的降低而升高;心电图的异常率也随着海拔高度的增高而增加。
OBJECTIVE: To observe the changes of blood pressure, heart rate, oxygen saturation and electrocardiogram (ECG) at different altitudes in the first visit to Tibet by train. Methods: A total of 440 healthy travelers (24 off) who first made their way to Tibet by train from Shanghai, Guangzhou, Beijing and Chengdu were selected and observed at an altitude of 2 800 m, 4 200 m, 4 600 m, 5 100 The blood pressure, heart rate, blood oxygen saturation and ECG changes at 4 500 m and 3 600 m were compared with those at 2 800 m above sea level respectively. Results: The blood pressure, heart rate and oxygen saturation were significantly different at different altitudes and 2 800 m above sea level (P <0.01). The abnormal rate of ECG at each altitude was also significantly higher than that at 2 800 m Significant statistical difference (P <0.01). CONCLUSION: Passengers entering Tibet by train have higher blood pressure and heart rate with increasing altitude, and declining with the altitude decreasing. Oxygen saturation decreases with increasing altitude. With the decrease of altitude And increased; abnormal rate of ECG also increased with the elevation above sea level.