If it's just that the blood needs cleaned, leeches are still widely used even in hospitals. Those little guys just know what they're doing lol. But certain conditions like hemochromatosis, where the body stores too much iron and can't get rid of it, are still treated almost exclusively by bloodletting. We just call it phlebotomy now lol.
RE: Remember back when bloodletting was all the rage? I wonder if they still tilted ...