醫(yi)(yi)用(yong)場(chang)(chang)(chang)(chang)所(suo)(suo)根據設(she)備和患(huan)(huan)者(zhe)(zhe)之間(jian)的接(jie)觸(chu)形式以及醫(yi)(yi)用(yong)場(chang)(chang)(chang)(chang)所(suo)(suo)的具(ju)體(ti)(ti)(ti)用(yong)途，根據GB16895.24 -2005《建筑物電(dian)(dian)氣(qi)(qi)裝(zhuang)(zhuang)置(zhi)(zhi) 第7-710部(bu)分(fen)：特殊裝(zhuang)(zhuang)置(zhi)(zhi)或場(chang)(chang)(chang)(chang)所(suo)(suo)的要求——醫(yi)(yi)用(yong)場(chang)(chang)(chang)(chang)所(suo)(suo)》相關規定，可以將其劃分(fen)為 0、1、2 類場(chang)(chang)(chang)(chang)所(suo)(suo)：0類場(chang)(chang)(chang)(chang)所(suo)(suo)是(shi)指(zhi)醫(yi)(yi)用(yong)電(dian)(dian)氣(qi)(qi)設(she)備不(bu)與(yu)人體(ti)(ti)(ti)直接(jie)接(jie)觸(chu)的場(chang)(chang)(chang)(chang)所(suo)(suo)，例(li)如候診室(shi)等(deng)場(chang)(chang)(chang)(chang)所(suo)(suo)。類場(chang)(chang)(chang)(chang)所(suo)(suo)是(shi)指(zhi)醫(yi)(yi)用(yong)電(dian)(dian)氣(qi)(qi)設(she)備與(yu)人體(ti)(ti)(ti)有(you)接(jie)觸(chu)但斷(duan)電(dian)(dian)不(bu)會造成患(huan)(huan)者(zhe)(zhe)生(sheng)命危(wei)險，且不(bu)影響對患(huan)(huan)者(zhe)(zhe)的診斷(duan)與(yu)治用(yong)的場(chang)(chang)(chang)(chang)所(suo)(suo)，例(li)如病房、等(deng)場(chang)(chang)(chang)(chang)所(suo)(suo)。類場(chang)(chang)(chang)(chang)所(suo)(suo)是(shi)指(zhi)在醫(yi)(yi)用(yong)電(dian)(dian)氣(qi)(qi)設(she)備與(yu)人體(ti)(ti)(ti)有(you)接(jie)觸(chu)但電(dian)(dian)源中斷(duan)會引起患(huan)(huan)者(zhe)(zhe)生(sheng)命危(wei)險的場(chang)(chang)(chang)(chang)所(suo)(suo)，例(li)如麻藥(yao)室(shi)、手術室(shi)、ICU、CCU、DSA 等(deng)場(chang)(chang)(chang)(chang)所(suo)(suo)。因此，在 2 類醫(yi)(yi)用(yong)場(chang)(chang)(chang)(chang)所(suo)(suo)中使用(yong)帶絕(jue)緣監視的醫(yi)(yi)用(yong)隔離電(dian)(dian)源系統，即醫(yi)(yi)用(yong) IT 系統。

在2類醫用(yong)場所內(nei)(nei)，用(yong)于維持生命(ming)、手術和其他位于“患者區(qu)域(yu)”內(nei)(nei)的醫用(yong)電(dian)氣設備(bei)和系統的供電(dian)回(hui)路，均應采(cai)用(yong)醫用(yong)IT系統。至(zhi)少(shao)應設置(zhi)一回(hui)獨立的醫用(yong)IT系統。醫用(yong)IT系統應配置(zhi)一個交流內(nei)(nei)阻抗不(bu)少(shao)于100Ω的絕緣(yuan)監談(tan)饑測(ce)(ce)器(qi)并滿足下列要求(qiu)：測(ce)(ce)試(shi)電(dian)壓不(bu)應大于直(zhi)流95V；注入電(dian)流的峰值不(bu)應大于1mA；遲在絕緣(yuan)電(dian)阻降至(zhi)50kΩ，時，應發(fa)出(chu)信號(hao)，并應配置(zhi)試(shi)驗此(ci)功能(neng)的器(qi)具。

在(zai)(zai)0類和1類醫院(yuan)場(chang)所，由于無(wu)醫院(yuan)設(she)備(bei)使用(yong)，或相關(guan)設(she)備(bei)僅使用(yong)在(zai)(zai)人體些非致(zhi)命部位，所以(yi)可(ke)使用(yong)普通(tong)建(jian)欽(qin)物的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)漂源各和漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保護措施。一(yi)般(ban)(ban)采(cai)用(yong)TN系(xi)統(tong)(tong)或系(xi)統(tong)(tong)，并配備(bei)剩余電(dian)(dian)(dian)(dian)流(liu)保護設(she)備(bei)RCD，當(dang)發生漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)流(liu)超(chao)過(guo)30mA的(de)(de)(de)(de)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)事故(gu)時，RCD動作，分斷故(gu)障回路(lu)。這樣(yang)即使造成醫院(yuan)設(she)備(bei)斷電(dian)(dian)(dian)(dian)，也不(bu)(bu)會(hui)(hui)對(dui)(dui)患(huan)者(zhe)造成重(zhong)大影(ying)響，醫生的(de)(de)(de)(de)診斷也可(ke)重(zhong)新開始。IT系(xi)統(tong)(tong)作用(yong)：降低(di)出點電(dian)(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)(dian)網(wang)對(dui)(dui)地(di)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)流(liu)（有效控(kong)制(zhi)對(dui)(dui)心臟(zang)的(de)(de)(de)(de)直接(jie)(jie)(jie)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)），故(gu)人身觸電(dian)(dian)(dian)(dian)危險被降到低(di)程度。可(ke)以(yi)防(fang)止(zhi)接(jie)(jie)(jie)地(di)系(xi)統(tong)(tong)內(nei)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)流(liu)竄入(ru)某些與患(huan)者(zhe)連(lian)接(jie)(jie)(jie)的(de)(de)(de)(de)醫用(yong)電(dian)(dian)(dian)(dian)器(qi)設(she)備(bei)的(de)(de)(de)(de)對(dui)(dui)地(di)回路(lu)，從而避(bi)免(mian)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)對(dui)(dui)患(huan)者(zhe)安全所構成的(de)(de)(de)(de)威脅。該系(xi)統(tong)(tong)還可(ke)以(yi)避(bi)免(mian)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)導致(zhi)系(xi)統(tong)(tong)短路(lu)器(qi)或熔斷器(qi)動作，保證用(yong)電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)持續(xu)性和可(ke)靠(kao)(kao)性。一(yi)般(ban)(ban)用(yong)于不(bu)(bu)允許停電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)場(chang)所，或者(zhe)是要求嚴格地(di)連(lian)續(xu)供電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)地(di)方，it系(xi)統(tong)(tong)制(zhi)造廠家，醫院(yuan)的(de)(de)(de)(de)手術室和ICU室等(deng)二類場(chang)所要采(cai)用(yong)IT系(xi)統(tong)(tong)。采(cai)用(yong)醫用(yong)隔離電(dian)(dian)(dian)(dian)源(IT)系(xi)統(tong)(tong)，即電(dian)(dian)(dian)(dian)源中(zhong)性點不(bu)(bu)接(jie)(jie)(jie)地(di)，一(yi)旦設(she)備(bei)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)，單相對(dui)(dui)地(di)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)很(hen)小，不(bu)(bu)會(hui)(hui)破壞電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)(de)(de)平衡，所以(yi)比電(dian)(dian)(dian)(dian)源中(zhong)性點接(jie)(jie)(jie)地(di)的(de)(de)(de)(de)系(xi)統(tong)(tong)安全、可(ke)靠(kao)(kao)。