• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>British Journal of Industrial Medicine >Levels of short (1-15 ms) electrical shocks from a 50 Hz supply inducing ventricular fibrillation in hyperbaric helium and oxygen.
【2h】

Levels of short (1-15 ms) electrical shocks from a 50 Hz supply inducing ventricular fibrillation in hyperbaric helium and oxygen.

机译：来自50 Hz电源的短时（1-15 ms）电击会导致高压氦气和氧气引起心室纤颤。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An investigation was undertaken to determine the ventricular fibrillation (VF) threshold of anaesthetised dogs subjected to external application of electric shocks between a foreleg and a hindleg. The shocks were 2-15 ms sections of 50 Hz sine waveform starting at peak current and were applied at a known time in the heart cycle. The object of the experiment was to determine if there was an increase in cardiac susceptibility to electrically induced VF at 31 atmospheres absolute (atm abs) in a helium and oxygen environment. The duration and position of that part of the cardiac cycle most vulnerable to induction of VF by electrocution was found (seven animals) using 4 ms shocks and then the minimum fibrillating current for shocks of 2-15 ms (min FC2-15) delivered at the most vulnerable point of the cycle (five animals). Body resistance was calculated from the data so gathered. Fibrillation thresholds were not changed by compression and there were no significant changes in the vulnerable period of the cardiac cycle. Min FC2 was significantly higher than for other durations under both control (3.21 A, SD 1.08) and test conditions (3.26 A, SD 0.39), p = 0.001. There was no difference in body resistance at 31 atm abs (395.5, SD 12.9) from control values at 1 atm abs (396.7, SD 10.9). From these data it was concluded that the heart is no more susceptible to the induction of VF at 31 atm abs in a helium oxygen environment and additional safety factors are unnecessary from this point of view.
机译：进行了一项调查，以确定在前肢和后腿之间受到电击的外部施加电击的麻醉犬的心室纤颤（VF）阈值。冲击是从峰值电流开始的50 Hz正弦波形的2-15 ms截面，并在心动周期的已知时间施加。实验的目的是确定在氦气和氧气环境中，在31个绝对大气压（atm abs）时，心脏对电感应VF的敏感性是否增加。使用4 ms的电击发现了最容易通过电死法诱发VF的那部分心动周期的持续时间和位置（七只动物），然后在2-15 ms的电击下最小颤动电流（最小FC2-15）通过周期中最脆弱的点（五只动物）。从如此收集的数据计算出身体抵抗力。颤动阈值不会因受压而改变，并且在心动周期的脆弱时期也没有显着改变。在对照（3.21 A，SD 1.08）和测试条件（3.26 A，SD 0.39）下，最小FC2均显着高于其他持续时间，p = 0.001。 31 atm abs（395.5，SD 12.9）时的身体抵抗力与1 atm abs（396.7，SD 10.9）的对照值没有差异。从这些数据得出的结论是，在氦氧环境中，心脏不再容易受到31 atm abs的VF的感应，因此从这个角度来看，不需要额外的安全因素。

著录项

相似文献

  • 外文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号