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apparatus for the identification of open kretselektroder during patientundersokning with use of an eeg device
apparatus for the identification of open kretselektroder during patientundersokning with use of an eeg device
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机译:使用脑电图设备在患者未卧床期间识别开颅角膜突肌的设备
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摘要
A system for continuous monitoring for open circuits in multiple lead EEG systems during patient testing. Means are provided for repetitively applying a low current signal, having a distinctive waveform and frequency, to each electrode of the system. In the event an electrode is detached from the patient's scalp or otherwise open, the distinctive signal is apparent in the recorded output. Otherwise the distinctive signal is of such low magnitude that it is below the signal-to-noise ratio of the EEG amplifier. In systems including multiple leads, the test signal is successively applied to each electrode in the system in a time-controlled sequence. In one preferred embodiment a distinctive signal is used comprising a four pulse burst of 25 Hz frequency.
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