Dry gangene occurs when the tissues are dessicated by a gradual slowing of their blood supply, typically occuring in a limb which is chronically ischaemic due to atherosclerosis. The necrotic tissue becomes black, dry, wrinkled and greasy to touch. There is a clearly defined line of separation between the dead and viable tissue. Infection is minimal.
Eventually the necrotic area seperates from the viable tissue and skin slowly heals the defect.
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