bloodletting(redirected from Blood letting machine)
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Removing blood, usually from a vein; formerly used as a general remedial measure, but used now in congestive heart failure and polycythemia. See: phlebotomy.
2. The removal of blood, usually from a vein, as a therapeutic measure.
the therapeutic opening of an artery or vein to withdraw blood from a particular area. It is sometimes performed to treat polycythemia and congestive heart failure. See also phlebotomy.
Medical history Venesection, see there; phlebotomy; leeching
Removing blood, usually from a vein; used in congestive heart failure and polycythemia.