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<p><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"><img src="http://mmbiz.qpic.cn/mmbiz/kFiaamOEjRian1HH0R0eUOoCeBLcQMwLwP8AhIKEgibEZWZ6Aj8JI7ctB2SCxKLuXUNfMEVnjyjE28FWL7b7WmoKQ/0?tp=webp" data-ratio="0.11834319526627218" data-w="" />电子医疗仪器设备与电相关，如果使用不当，防护不当，措施不力，也会给病人或医护人员带来电击的危险，造成人身危害。因此，在临床医疗工作中如何安全使用医疗仪器设备，把电击事故减少到最低程度，是一个值得高度重视的问题。而更重要的问题是：在医疗检查或治疗过程中，我们应该采取什么措施，才能确保病人免受电击伤的危险。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><strong style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;">一、 人体电效应</strong><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">电击是电流通过人体引起的一定生理反应的现象。人体是电导体，当人体成为电路的一部分时，就有电流通过人体，从而引起电击。电击引起生理效应和人体损伤的直接原因是电流。通过人体的电流的大小取决于两个接触面之间的人体阻抗和两界面的阻抗以及加于人体的电压。人体的阻抗比较复杂，它是一个非线性时变的网络，这个结论可以被不同的通电时间和不同频率的电流，通过人体产生不一样的电流强度以及电流和电压之间存在不同的相位差来证明。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">人体的最外层是导电能力很差的皮肤，其最外层称为表皮，由角质层、透明层和粒层组成。实验证明皮肤阻抗主要取决于角质层，其厚度不同，阻抗就不同。一平方厘米干燥的无损伤皮肤，其阻值范围为10～1000KΩ，具体数值还取决于身体部位及湿度。人体每一肢体的内阻抗是200Ω，躯干的内阻抗约为100Ω，任意两个肢体间的阻抗约为500Ω。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">一般说来，在一定的电压下，通过人体电流的大小取决于人体阻抗的大小，而人体阻抗的大小又主要受以下因素影响：</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">1. 皮肤的条件。包括表皮角质层的厚薄、皮肤的干燥及粗糙程度等。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">2. 电流的频率。在相同接触条件下，电流频率高时人体总阻抗小，电流频率低时人体总阻抗大，在直流情况下，人体电阻达到最大值。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">3. 接触条件。在触电时，带电金属与皮肤截面上还存在复杂的离子交换过程，直流电会发生激化现象从而增加接触电阻，交流电会产生位移电流而降低人体的电阻。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">4. 其他因素。如带电导体与皮肤接触的松紧、接触面的大小、接触面的清洁程度及有否电极膏的存在、皮肤有否破损等因素均能直接影响皮肤电阻的大小。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">需指出的是，皮肤电阻是人体的自然保护层。如果注射针头、针灸针等刺入皮下，尤其是电极或导管插入体内时，则皮肤保护层的作用就失效了，人体的有效电阻将大大降低。有资料指出，导体插入皮下时电阻为500Ω至5kΩ，接近心脏时的电阻是200Ω至1kΩ，这一点在心脏手术中或心脏介入治疗过程中，必须引起重视。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><strong style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;"> 二、 电击的发生</strong><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">电流通过人体的不同部位和流过不同的器官，其生理效应与损伤的程度不同，因而危险性也不一样。如果流过重要器官的电流强度足以影响该器官功能的话，就有致命的危险。一般说来，电流致死通常是由于心脏停跳或呼吸停止。因而电流的路径越接近脑、心脏和肺等重要器官，则其危险性就越大。有些临床治疗方法需要向病人体内插入导电器件(诸如：导管或电极等)，当其靠近心脏时，患者对电流将特别敏感，如果没有可靠的防护措施，则接触点上的电流密度可能是很高的。在有心导管的情况下，75μA～400μA的电流就能引起纤颤，因此，通过心脏电流的允许安全极限规定为10μA。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><strong style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;">三、产生电击的原因</strong><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">一般说来，电击的电源来自50Hz的交流电源。在医院中可能造成病人或医护人员受电击的因素主要有以下几点：</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> 1. 仪器设备故障造成漏电</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> 2. 电容耦合造成的漏电</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> 3. 仪器设备未接地或接地不良</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> 4. 非等电位接地</span></p><p><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">5. 检查或治疗时，病人皮肤电阻的减少或消除。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">因此，在电子医疗仪器设备的使用过程中，必须建立安全有效的防护措施，一般说来，有以下几种防止电击的方法：</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> (1) 仪器外壳接地</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> (2) 等电位接地</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> (3) 使用隔离电源系统</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> (4) 采用低电压供电</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> (5) 采用双重绝缘措施</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><strong style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;">四、 几点建议</strong><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;"> </span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">1. 正确使用电源插头插座，如系单相三线制插头、插座，插座需确保右边孔为相线(火线)，左边孔为零线，中间孔为地线。地线应经常检查，确保可靠接地。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">2. 电子医疗仪器应经常检查绝缘程度，防止漏电。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">3. 所有电子医疗仪器应可靠接地，有的可采用漏电保护装置及防雷击装置。</span><br style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify; white-space: normal;" /><span style="font-family: Simsun; font-size: medium; line-height: 25px; text-align: justify;">4. 对使用、操作和维修人员均应进行用电安全的培训，确保安全用电。</span></p><p style=""><img src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0" data-ratio="0.14784394250513347" data-w="487" width="auto" width="auto" src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0?tp=webp" style="word-wrap: break-word !important; 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margin-bottom: 0px; max-width: 100%; word-wrap: normal; min-height: 1em; white-space: pre-wrap; background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; box-sizing: border-box !important;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 仿宋; font-size: 19px;"> </span><strong style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(255, 0, 0); font-size: 20px; margin: 0px; padding: 0px;"></span></strong><br style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;" /></p><p style="margin-top: 0px; margin-bottom: 0px; max-width: 100%; word-wrap: normal; min-height: 1em; white-space: pre-wrap; background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; box-sizing: border-box !important;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: 仿宋; font-size: 19px;">群主微信号：</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-family: sans-serif; font-size: 16px;"> </span></p><p style="margin-top: 0px; margin-bottom: 0px; max-width: 100%; word-wrap: normal; min-height: 1em; white-space: pre-wrap; background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; box-sizing: border-box !important;"><strong style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; font-size: 20px; color: rgb(255, 0, 0);"> shanying916</span></strong></p><fieldset class="brcolor" style="margin: 0px; padding: 5px; border: 1px solid rgb(0, 187, 236); max-width: 100%; color: rgb(62, 62, 62); white-space: normal; font-family: 微软雅黑; line-height: 24px; font-size: 12px; background-color: rgb(248, 247, 245); word-wrap: break-word !important; box-sizing: border-box !important;"><legend style="padding: 0px; max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(51, 51, 51); margin: 0px 10px; border-width: 0px;"><span class="bkcolor" style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 5px 10px; border: 0px; color: rgb(255, 255, 255); font-weight: bold; font-size: 14px; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; background-color: rgb(0, 187, 236);"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px;">复制上面微信号</span><img data-s="300,640" data-ratio="1.35" data-w="20" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6NE8iaIXiblrE1WKyXQz6qbATAS0VZxTKlGupjMMNvicoNs9vhvYGBr83wmsdO1ouTw7kVDibk9w6VoMg/0" class="" id="c6" width="auto" width="auto" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6NE8iaIXiblrE1WKyXQz6qbATAS0VZxTKlGupjMMNvicoNs9vhvYGBr83wmsdO1ouTw7kVDibk9w6VoMg/640?tp=webp" style="margin: 0px; padding: 0px; border: 0px; word-wrap: break-word !important; box-sizing: border-box !important; visibility: visible !important; width: auto !important;" /><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px;">联系我哟</span></span></legend><blockquote style="max-width: 100%; padding: 0px; border: 0px; word-wrap: break-word !important; box-sizing: border-box !important;"><p style="margin-top: 0px; margin-bottom: 0px; max-width: 100%; word-wrap: normal; min-height: 1em; white-space: pre-wrap; padding: 0px; border: 0px; box-sizing: border-box !important;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px; border: 0px; color: rgb(255, 192, 0); font-size: 14px;"></span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(255, 192, 0); margin: 0px; padding: 0px; border: 0px; font-size: 14px;">? </span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127); margin: 0px; padding: 0px; border: 0px; line-height: 28px;">定期推送</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(255, 192, 0); margin: 0px; padding: 0px; border: 0px; line-height: 28px;">医械资讯</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px; border: 0px; line-height: 28px;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">，</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(0, 176, 80);">厂家推介</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127); margin: 0px; padding: 0px;">，</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px;"><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(112, 48, 160);">维修知识</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">，</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(0, 176, 240);">产品知识</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">，</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(146, 208, 80);">医疗器械相关</span></span></span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">等诸多优质内容，</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127); margin: 0px; padding: 0px;">最接地气</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">、</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127); margin: 0px; padding: 0px;">重价值</span><span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; color: rgb(127, 127, 127);">的医疗器械微信平台！关注我们妥妥没错，<span style="max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; margin: 0px; padding: 0px;">推广合作联系我呦</span>！</span></span></p></blockquote></fieldset><p style=""><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6MYAEPWTib8tjxcvx0icbN5kq6PvfS6PHyKaMRwicKyXRpyaPRoHgn3OOr1vBKYm6b9vtYp87hJM8nXw/0" data-ratio="0.7835365853658537" data-w="328" width="auto" width="auto" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6MYAEPWTib8tjxcvx0icbN5kq6PvfS6PHyKaMRwicKyXRpyaPRoHgn3OOr1vBKYm6b9vtYp87hJM8nXw/640?tp=webp" style="word-wrap: break-word !important; 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发表于 2020-10-21 13:41:37