下体负压反复暴露对下体负压耐力的影响

发布时间：2018-04-07 16:32

  本文选题：下体负压　切入点：人的耐力　出处：《航天医学与医学工程》2000年01期

【摘要】：目的探讨反复下体负压暴露对人体下体负压（ＬＢＮＰ） 耐力的影响及其与心血管功能的关系。方法１０ 名男性健康被试者进行负压值为－ ５０ ｍ ｍ Ｈｇ 、持续８ ｍｉｎ 的下体负压锻炼，每天１ 次、连续８ ｄ ，记录心率及血压。锻炼前后进行ＬＢＮＰ 耐力检查，并测量心脏泵血功能。结果锻炼前、后负压最大耐受时间（ＤＮＰ） 及累积应激指数（ＣＳＩ） 分别为：１０５８ ±２１６ ｓ，１３５４ ±２３３ ｓ；４５８３３ ±１２５４６ ｓ·ｍ ｍ Ｈｇ 、６３４３３±１３４５８ ｓ·ｍ ｍ Ｈｇ ，锻炼前后差异显著（ Ｐ＜ ０ ．０５） ，，心脏泵血功能呈增强趋势。结论下体负压反复暴露可提高人的下体负压耐力，其原因之一可能在于增强了心肌的收缩能力，降低外周血管的顺应性，心血管系统对低血压应激的代偿机制更加有效，从而提高了心水平动脉血压。
[Abstract]:Objective to investigate the effects of repeated lower body negative pressure exposure (LBNPs) on human LBNPs and the relationship between LBNPs and cardiovascular function.Methods Ten male healthy subjects were treated with negative pressure (-50mm Hg) for 8 min, once a day for 8 days. Heart rate (HR) and blood pressure (BP) were recorded.LBNP endurance test was performed before and after exercise, and cardiac pump function was measured.Results before and after exercise, the maximum tolerance time of negative pressure and the cumulative stress index (CSI) were 1: 1058 卤216s (1354 卤233sg) 45833 卤12546 SmHg 63433 卤13458 smHg, respectively (P < 0. 05). The blood function of cardiac pump showed a tendency to increase (P < 0. 05).Conclusion repeated exposure of lower body negative pressure can improve the endurance of lower body negative pressure, which may be due to the enhancement of myocardial contractility and the decrease of peripheral vascular compliance, and the more effective compensatory mechanism of cardiovascular system for hypotension stress.As a result, the blood pressure of the cardiac artery is raised.
【作者单位】： 第四军医大学航空航天生物动力学教研室!西安710032 第四军医大学航空航天生物动力学教研室!西安710032 第四军医大学航空航天生物动力学教研室!西安710032 第四军医大学航空航天生物动力学教研室!西安710032 第四军医大学航空航天生物动力学教研室!西安710032

本文编号：1719969