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Microcurrent Electrical Stimulation

Preface. This lecture addresses the physiological effect of electrical currents on nonexcitable tissue for tissue repair in its various forms: (a) improvement of vascular status, (b) edema control, (c) wound healing, (d) osteogenesis. Current of Injury (Theory). Wounds are initially pos

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Microcurrent Electrical Stimulation

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    1. Microcurrent Electrical Stimulation 2008/06/03 Nan-Ying Yu

    2. Preface This lecture addresses the physiological effect of electrical currents on nonexcitable tissue for tissue repair in its various forms: (a) improvement of vascular status, (b) edema control, (c) wound healing, (d) osteogenesis

    3. Current of Injury (Theory) Wounds are initially positive with respect to surrounding tissue This positive polarity triggers the onset of repair processes Maintaining this positive polarity would potentiate healing “Anode over the wound” was suggested by most of the previous studies.

    4. Electrical Stimulation for Tissue Repair Wound healing is also impeded by infection Electrical stimulation using the negative lead of a DC generator has been shown in culture and in vivo either to be bacteriostatic or to retard the growth of common gram+ and gram- microorganisms

    5. Electrical Stimulation for Tissue Repair There is no evidence for the effectiveness of sub-sensory-level stimulation for the healing of open wound

    6. Electrical Stimulation for Bone Healing The “current of injury” theory for bone: a relative negativity of the injured tissue with respect to the uninjured.

    7. Electrical Stimulation for Bone Healing The three best-studied and most commonly used techniques are (a) Cathodal placement in the fracture site and anodal placement on the skin at some distance. (b) Implantation of the entire system (c) The use of pulsed electromagnetic fields (PEMFs)

    8. Electrical Stimulation for Bone Healing PEMFs is the use of inductive coils to the skin or cast to deliver an asymmetrical, biphasic pulse at a frequency of about 15 pps. Semiinvasive DC, totally invasive DC, and PEMF were the only FDA-approved (and physician administered) osteogenic means.

    9. Electrical Stimulation for Bone Healing 60 Hz sinusoidal AC, pulsed current, and interference modulations of higher-frequency alternating currents are also being used.

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