不同囊覆盖面积抗荷裤加压呼吸对心功能的影响  

Cardiovascular Effect of Positive Pressure Breathing Using G-suits with Different Bladder Coverage.

作　　者：韩学平[1] 王琼[1] 付丽珊[1] 陈娟[1] 石强[1] 闫汝泉[1] 

机构地区：[1]空军航空医学研究所,北京100036

出　　处：《航天医学与医学工程》2003年第1期24-27,共4页Space Medicine & Medical Engineering

摘　　要：目的探讨加压呼吸时抗荷裤的囊覆盖面积大小对心功能的影响。方法 6名 1 8～ 2 0岁的健康男性被试者 ,随机穿 3种囊覆盖面积分别为 45 %、65 %和 90 %的抗荷裤。面罩加压值为 30、5 0、70mmHg ,抗荷裤加压值为面罩的 3倍。加压持续时间为 3min ,每分钟记录一次心功能指标 ,每次加压间隔 1 0min。本装备由抗荷裤、代偿背心、头盔和面罩组成。结果所有被试者全部完成试验。穿 3种囊覆盖面积抗荷裤 ,在加压值为 70mmHg ,3min的加压呼吸时间内 ,平均动脉压显著高于对照组 ;而心搏量变化与对照组比 ,囊覆盖面积为 65 %和 90 %组无显著变化 ,45 %组显著降低 (P <0 .0 0 1 )。各组平均动脉压的平均值与加压值有较好的线性关系。结论抗荷裤囊覆盖面积相对较大 ,在保证血压增高的同时 。Objective To compare cardiovascular function of subjects exposed to positive pressure breathing (PPB) while wearing G suits with different bladder coverage. Method 6 male healthy subjects ( 18～20 years)wearing three kinds of G suit with bladder coverage of 45%,65% and 90%,respectively,were exposed to PPB with counterpressures of 30,50 or 70 mmHg for up to 3 min continuously. G suit bladder pressure value was three times as high as that of PPB counterpressure. Cardiovascular function was observed every minute. The interval between PPBs was 10 min. The equipment consists of G suit, jerkin, helmet and mask. Result All subjects completed the experiment successfully. Mean arterial pressure(MAP) elevated significantly, while stroke volume had no striking change, as compared with control group when wearing G suit with 65% or 90% bladder coverage G suit. During PPB for 3 min,cardiovascular function didn′t change significantly. The mean value of MAP was proportional to the level of PPB. Conclusion The greater G suit bladder coverage, the less cardiovascular function effect when PPB was conducted simultaneously.

关 键 词：加压呼吸 抗荷裤 心血管功能 囊式抗荷服 

分 类 号：R852.21[医药卫生—航空、航天与航海医学]