Kahlmeyer H, Häussler C, Lyngsmo K O, Berg S, Schipper K P
Department of Biomedical Engineering, University Hospital of Trondheim, Norway.
J Med Eng Technol. 1998 Mar-Apr;22(2):73-81. doi: 10.3109/03091909809010002.
This paper presents the results of the evaluation testing of six 12-lead electrocardiographs, three purpose-built instruments and three of the recently introduced personal computer-based type (PC-based). As for PC-based electrocardiographs, three examples of the MRT systems, two examples of the 300 Hz CardioScope model and one prototype of the 1200 Hz CardioScope were examined but only results for one representative example of each are given here. It was of particular interest to compare the performance advantages and limitations of the PC-based electrocardiographs with that of instruments currently in use. A test procedure was developed that can be used by a medical technical department to evaluate an electrocardiograph before making a purchase decision. The procedure includes tests of frequency response, sampling rate, 50 Hz filter attenuation, gain and common mode rejection ratio (CMRR) plus tests based upon simulated electrocardiograms (ECGs). The procedure takes account of the AHA and ECRI recommendations for electrocardiograph checks and can be completed in less than two hours. The only equipment required being an ECG simulator and a signal generator. The results of this work show that purpose-built electrocardiographs meet all normal performance requirements, whereas the PC-based types, whilst having the potential to at least equal these requirements, currently exhibit software and hardware related problems.
本文介绍了对六台12导联心电图机进行评估测试的结果，其中三台是专门制造的仪器，另外三台是最近推出的基于个人计算机的类型（基于PC）。对于基于PC的心电图机，研究了MRT系统的三个实例、300Hz CardioScope型号的两个实例以及1200Hz CardioScope的一个原型，但这里仅给出每个型号一个代表性实例的结果。将基于PC的心电图机的性能优势和局限性与当前使用的仪器进行比较特别有意义。开发了一种测试程序，医疗技术部门在做出购买决定之前可使用该程序来评估心电图机。该程序包括频率响应测试、采样率测试、50Hz滤波器衰减测试、增益测试和共模抑制比（CMRR）测试，以及基于模拟心电图（ECG）的测试。该程序考虑了美国心脏协会（AHA）和医疗保健研究与质量机构（ECRI）对心电图机检查的建议，并且可以在不到两小时内完成。唯一需要的设备是一台心电图模拟器和一台信号发生器。这项工作的结果表明，专门制造的心电图机满足所有正常性能要求，而基于PC的类型虽然有可能至少达到这些要求，但目前存在与软件和硬件相关的问题。
