Hanada E, Kodama K, Takano K, Watanabe Y, Nose Y
Department of Medical Information Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
J Med Syst. 2001 Aug;25(4):257-67. doi: 10.1023/a:1010727220929.
Electromagnetic interference (EMI) with electronic medical equipment by radio waves from mobile telephone handsets has been reported and is currently receiving wide attention. The possibility of EMI with electronic medical equipment by radio waves coming into the hospital has also been pointed out. But so far, there are no reports measuring the frequency distribution of electric field intensity induced by incoming radio waves. Therefore, we measured electric field intensity induced by radio waves coming into our 11-floor hospital, which was under construction. The maximum intensity observed was about 200 V/m at 2.79 GHz, from airport surveillance radar waves. The maximum intensity induced by radio waves from cellular phone base stations was 1.78 V/m. These data show that various frequencies of radio waves are common in this urban area, and that they induce strong electricfield intensity. This strong electric field intensity might cause EMI with electronic medical equipment. Measurement of the electromagnetic environment should be done by each hospital in urban areas to prevent EMI with electronic medical equipment.
移动电话手机发出的无线电波对电子医疗设备产生电磁干扰（EMI）的情况已有报道，目前正受到广泛关注。也有人指出，进入医院的无线电波有可能对电子医疗设备产生电磁干扰。但到目前为止，尚无关于测量入射无线电波感应电场强度频率分布的报告。因此，我们对正在建设中的11层医院内入射无线电波感应的电场强度进行了测量。观测到的最大强度在2.79吉赫兹时约为200伏/米，来自机场监视雷达波。手机基站无线电波感应的最大强度为1.78伏/米。这些数据表明，该市区存在各种频率的无线电波，且它们会感应出很强的电场强度。这种强电场强度可能会对电子医疗设备造成电磁干扰。市区的每家医院都应进行电磁环境测量，以防止对电子医疗设备产生电磁干扰。
