400-MHz 频段无线医疗遥测系统的电磁兼容性问题及其使用简化方法进行安全操作的管理。

IF 3.5 3区 医学 Q1 HEALTH CARE SCIENCES & SERVICES
Kai Ishida, Kiyotaka Fujii, Eisuke Hanada
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引用次数: 0

摘要

无线医疗遥测系统(WMTS)是典型的基于无线电通信的医疗设备,用于监测各种生物参数,如心电图和呼吸频率。在日本,WMTS 的指定频段为 400 MHz。然而,导致 WMTS 接收不良的问题是人们关注的主要问题。在这项研究中,我们分析了其他无线电通信系统造成的电磁干扰(EMI)、互调(IM)效应以及电气设备产生的噪音对 WMTS 的影响,并讨论了如何处理这些问题。其他无线电通信系统也共享 400-MHz 频段。我们展示了流浪病人位置检测系统产生的瞬时电压和脉冲电压,以及它们对 WMTS 产生电磁干扰效应的可能性。此外,我们还介绍了 IM 效应会大大降低 WMTS 的接收能力。此外,电气设备(如发光二极管灯和监控摄像头)产生的电磁噪声可能会超过 400 MHz 频段,因为这些设备采用开关模式电源和/或中央处理单元,并辐射宽带发射。此外,我们还提出并评估了一些简单易行的方法,利用 WMTS 接收器和软件定义无线电中安装的简化频谱分析功能来评估电磁环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Electromagnetic Compatibility Issues in 400-MHz-Band Wireless Medical Telemetry Systems and Their Management Using Simplified Methods for Safe Operation.

Electromagnetic Compatibility Issues in 400-MHz-Band Wireless Medical Telemetry Systems and Their Management Using Simplified Methods for Safe Operation.

Wireless medical telemetry systems (WMTSs) are typical radio communication-based medical devices that monitor various biological parameters, such as electrocardiograms and respiration rates. In Japan, the assigned frequency band for WMTSs is 400 MHz. However, the issues accounting for poor reception in WMTS constitute major concerns. In this study, we analyzed the effects of electromagnetic interferences (EMIs) caused by other radio communication systems, the intermodulation (IM) effect, and noises generated from electrical devices on WMTS and discussed their management. The 400-MHz frequency band is also shared by other radio communication systems. We showed the instantaneous and impulsive voltages generated from the location-detection system for wandering patients and their potential to exhibit EMI effects on WMTS. Further, we presented the IM effect significantly reduces reception in WMTS. Additionally, the electromagnetic noises generated from electrical devices, such as light-emitting diode lamps and security cameras, can exceed the 400 MHz frequency band as these devices employ the switched-mode power supply and/or central processing unit and radiate wideband emissions. Moreover, we proposed and evaluated simple and facile methods using a simplified spectrum analysis function installed in the WMTS receiver and software-defined radio for evaluating the electromagnetic environment.

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来源期刊
Journal of Medical Systems
Journal of Medical Systems 医学-卫生保健
CiteScore
11.60
自引率
1.90%
发文量
83
审稿时长
4.8 months
期刊介绍: Journal of Medical Systems provides a forum for the presentation and discussion of the increasingly extensive applications of new systems techniques and methods in hospital clinic and physician''s office administration; pathology radiology and pharmaceutical delivery systems; medical records storage and retrieval; and ancillary patient-support systems. The journal publishes informative articles essays and studies across the entire scale of medical systems from large hospital programs to novel small-scale medical services. Education is an integral part of this amalgamation of sciences and selected articles are published in this area. Since existing medical systems are constantly being modified to fit particular circumstances and to solve specific problems the journal includes a special section devoted to status reports on current installations.
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