out a phlebotomy. In contrast, phlebectomy is the removal of a vein.

Phlebotomies that are carried out in the treatment of some blood disorders are known as therapeutic phlebotomies. The average volume of whole blood drawn in a therapeutic phlebotomy to an adult is 1 unit (450-500 ml) weekly to once every several months, as needed.

Etymology

From (phlebotomia - phleb 'blood

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