关键词: 高血压, 气温骤降, 耳穴按摩

Abstract: Objective　To investigate the blood pressure response to sudden drops in temperature，and to explore the effect of ear acupoint massage on reducing this kind of response.Methods　One hundred Han college students were enrolled from School of Medicine，Shihezi University during December 2016 to February 2017 and equally divided into intervention group and non-intervention group based on the random number table（50 cases for each group）.After the measurement of MAP in a heated room with a temperature of 15 ℃，students in the intervention group first received 5-minute ear acupoint massage，measured MAP again，after that，they walked calmly to the outdoor environment with a temperature of -5 ℃，then MAP was measured immediately and at 5 minutes later；those in the non-intervention group walked calmly to three types of cold outdoor environments （-5 ℃，-10℃，-15 ℃），respectively，and MAP was measured immediately and at 5 minutes later respectively under these three conditions.Results　For those in the non-intervention group，both the MAP measured immediately and 5 minutes later after they exposed to the three cold environments increased gradually with the decrease of temperature（P<0.05）.To be specific，the MAP measured immediately after they exposed to the environment with a temperature of -5 ℃ was significantly higher than the baseline MAP 〔 （85±3） mm Hg〕 （tpaired=3.14，P<0.05），but it was similar to the baseline MAP 5 minutes later（tpaired=0.97，P>0.05）.However，when they exposed to the environment with a temperature of -10 ℃，both the MAP measured immediately and 5 minutes later were all significantly higher than the baseline MAP （tpaired=7.07，2.21，P<0.05）.The same status occurred when they exposed to the environment with a temperature of -15℃（tpaired=12.41，13.76，P<0.05）.For those in the intervention group，the MAP measured following the ear acupoint massage was much lower than the baseline MAP〔（77±4） mm Hg vs. （85±3）mm Hg〕（tpaired=4.23，P<0.05）.In the environment with a temperature of -5 ℃，the MAP measured immediately for the intervention group was （83±1）mm Hg，which was much lower than the intervention group's （86±2）mm Hg （t=2.20，P<0.05），but it increased to（84±1）mm Hg 5 minutes later （tpaired=-13.01，P<0.05）.Conclusion　Sudden drops in temperature can increase MAP，but ear acupoint massage can reduce such fluctuations.

Key words: Hypertension, Sudden drop of temperature, Auricular massage