Ionization is the splitting or ionizing of a solution by the passage of a direct current. The acid and alkaline (or radical) ions are drawn to opposite poles. For treatment, the method presupposes the drawing into the tissue of chemicals seeking their pole. In practice, the methods are like those of electroplating. A solution is placed on a part by means of a wet dressing, or is poured into a cavity, and an electrode is attached; a so-called neutral electrode is placed on a nearby convenient part. The current is turned on gradually; the solution is split and one of its elements seeks the distant pole, thus passing into the tissue.
A supply of direct current plus an ammeter and electrodes (one for the ear and one for the arm) comprise the essential features of the apparatus used. Switches, a pole charger and a signal light are desirable
MACFARLAN D. IONIZATION: CIRCUIT PLANS FOR AN INEXPENSIVE UNIT. Arch Otolaryngol. 1935;21(4):456–458. doi:10.1001/archotol.1935.00640020468008
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