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为了更便于在医院中做脑干听反应试验,作者用一台日立D-220立体声盒式录音机加以改装,在机内装进一块能产生脉宽0.1毫秒、间距100毫秒的方波发生器电路板,强度比正常听阈高70分贝,相邻方波极性相反以抵销伪迹。电路板的同步输出在发出短声的同时发送一个脉冲到磁带记录器的一个通道内,病人按常规方法记录的听诱发电位经放大后输入另一通道。这样就可以在没有迭加仪时在床旁进行记录留待以后进行计算机分析。这种记录器由于比实验室用记录器价格便宜,使用方便因此很适合于临床应用,特别对长时间监护的昏迷病人和利用儿童自然睡眠时进行记录更为适用。作者对在线迭加和离线记录后再行迭加的结果进行了比较。结果是令人满意的。当然这种做法不能
To make it easier to do brainstem response tests in a hospital, the author modified it with a Hitachi D-220 stereo cassette recorder and built a square-wave generator circuit board with pulse widths of 0.1 milliseconds and 100 milliseconds apart , The intensity 70 dB higher than the normal threshold, the opposite square wave opposite to offset the artifacts. The synchronous output of the circuit board sends a pulse to a channel of the tape recorder at the same time as the short tone. The patient’s evoked potential recorded by the conventional method is amplified and input to another channel. This allows the computer to be recorded at the bedside without the stackup for later analysis. This recorder, which is cheaper and easier to use than a laboratory recorder, is therefore well suited for clinical applications and is especially suitable for patients who are in long-term custody of unconscious patients and when they use their natural sleep. The authors compared the results of the overlay and offline records after the line was over. The result is satisfactory. Of course this can not be done