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Apparatus for central electroanalgesia
| Details |
Inventors: Kastrubin, Eduard M.; Nozhnikov, Valentin M.; Aleshkov, Sergei E.;
Assignee: Moskovsky oblastnoy nauchnoissledovatelsky inst. akusherstva i (Moskow, SU)
Primary Examiner: Kamm; William E.
Assistant Examiner:
Attorney, Agent or Firm: Lilling & Greenspan
An apparatus for central electroanalgesia comprises units for rhythmic action, which are connected in series with units for changing the shape of current pulses and preamplification units electrically coupled to a regulator of the amplitude of current pulses, a means for selecting a mode of action, a means for programmed limitation of the current average value, and a means for amplifying the output signal, which is connected, via a means for measuring the current average value, to electrodes secured on the patient's neck below the mastoid processes and on his forehead. The output signal amplifying means is connected to a compensation current limiting unit couple to a constant component compensating unit joined to a compensation current regulator. |
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DETAILED DESCRIPTION It is an object of this invention to eliminate the excessive polarization effects produced during electroanesthesia, provided the apparatus can be used for lengthy periods and a required level of pain relief is maintained.
The invention provides an apparatus for central electroanalgesia, which has two channels for pulsed action, comprising respectively several series-connected elements: rhythmic action units equipped with frequency regulators of current pulses, current pulse waveform control units equipped with regulators of the current pulse period-to-duration ratio, and current pulse preamplification units, inputs of the current pulse preamplification units of each channel being electrically connected to an amplitude regulator of current pulses, while the outputs thereof are electrically connected, one of said outputs directly and the other via a mode of action means which is electrically coupled with the remaining current pulse preamplification unit and to a means for programmed limitation of the average current value, to inputs of a means for amplifying the output signal, which has one of the outputs thereof connected to an input of the means for programmed limitation of the average current value, whose outputs are connected to one of the inputs of the current pulse preamplification units of each channel, while the other output of the output signal amplification means is connected to a means for measuring the average current value, which is connected to electrodes secured on the patient's neck below the mastoid processes and on the patient's forehead, which, according to the invention, is provided with a compensation current limiting unit whose input is connected to one of the outputs of the output signal amplification unit, a direct component compensating unit, which has its one input connected to an output of the compensation current limiting unit, while the output thereof is connected to one of the inputs of the output signal amplification means, and a compensation current regulator whose output is connected to another input of the compensation current limiting unit
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