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Galvanic Stimulation is characterized by high voltage, and is most useful in acute injuries associated with major tissue trauma with bleeding or swelling, as well as in prevention or retardation of muscle spasm, muscle re-education, maintenance, and range of motion. Additionally, the device is useful for immediate post-surgical stimulation of calf muscles to prevent venous thrombosis. In contrast to TENS and Interferential units, which apply alternating current, galvanic stimulators apply direct current. Direct current creates an electrical field over the treated area that, theoretically, changes blood flow. The positive pad behaves like ice, causing reduced circulation to the area under the pad and reduction in swelling. The negative pad behaves like heat, causing increased circulation. In essence, the build up of fluid from the affected area is moved back into circulation, thereby prompting quicker healing. The Galvanic Stimulator is the best modality for Iontophoresis treatments.
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