Inventors:
Joseph L. Allain - New Orleans LA
Henry Halperin - Baltimore MD
International Classification:
A61B 504
Abstract:
An electronic, miniaturized, pocket-size device having a multiplicity of tri-electrode sets (note FIGS. 3 and 6A) for monitoring and storing EKG or EEG signals, one being positive and the other negative, with the third being a possible signal opposite to the signal received sent in the opposite direction (to the electrode), lessening background noise. Each is connected to one or more amplifiers joined in a central amplifier which breaks up the signals into two separate, related signals, one being the difference in the bias voltages of the positive and negative voltages and the second being the amplified difference of the signals. The first is sent to a voltage sensitive detector, which sends a signal out when this difference becomes sufficient, the detector being set for triggering when an electrode becomes detached or otherwise defective, as in even an abnormal EKG or EEG the voltages will not be greatly different. The second signal is sent to a filter and then to appropriate detection equipment for monitoring the condition of the EKG or EEG, for example a peak detector, grounded needle meter, analog-to-digital converter, noise indicator, outside jack, etc. The peak detector is connected to an indicator and to the analog-to-digital converter to keep track of when peaks are reached to get a "print out" record of them.