STUDIES ON ELECTROACUPUNCTURE ANALGESIA (EAA) IN THE DOG:II. ELECTRICAL CONDITIONS OF EAA INDUCTION
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概要
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From among the human acupucture points illustrated in a figure, the authors selected four equivalent points, Kyokuchi (Li 11), Inkoten, Ashinosanri (S 36) and Bokoku, in the dog. When needles were inserted at these points to give electric stimulation, analgesia was recognized over a wide part of the body.<BR>The present report deals with electrical conditions to obtain analgesia in dogs.<BR>1) When an induction stimulator was used, a bilateral pulse wave appeared as an output wave. It was shown as a transformed rectangle wave with a duration of 0.3 msec on the anode side and as a spike wave with a duration of 0.25 msec on the cathode side.<BR>The output voltage of that stimulator was 180 V<SUB>P</SUB>_<SUB>P</SUB> at the maximum, as measured by a synchroscope, and the output current 22 mA.rms at the maximum, as measured by a high-frequency ammeter.<BR>2) Some electric conditions for a successful introduction of analgesia were as follows : 15-50 Hz in frequency, 0.5-8.0 V<SUB>P</SUB>_<SUB>P</SUB> in load voltage, 0.1-5.0 mA.rms in load current, and about 30 minutes as flowing time.<BR>3) In order to supply an effective stimulation, it was necessary to select such electrical conditions as to avoid electrolysis of the needle and burning of the tissue.<BR>To provide a constant electric stimulation continually a needle had to be fixed firmly. Adequate polarity of electrodes, minimum differences in resistant value among the four electrodes, and appropriate controled techniques for supplying the current were needed to obtain a successful analgesia.
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