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galvanotaxis and its value
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electrocurrent attracts WBC;s to area because if there is an electrical charge applied to an area of tiss. injury this will attract cells b/c they also have a charge. Value= destroy dead tissue that promotes bacteria growth. helpts fight infection. fibroblasts make collagen and elastin so scar/healing therefore less entry for bacteria.
-activated neutrophils are attracted to the negative electrode as well as lymphocytes, platelets, mast cells (which release histamine and initiate inflammatory process by degranulation). and fibroblasts |
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why does changing electrical potential of injured area with e-stim enhance healing?
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b/c when there is damage to cell membranes, activity of the sodium potassium pump is disturbed so the membranes become more positive hence wound areas usually have a more positive charge. e-stim can alter this changing it back to mroe negative (wihich is what it's resting membrance potential is at) thereby accelerating wound healing.
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