Apheresis (ἀφαίρεσις (aphairesis, "a taking away")) is a medical technology in which the blood of a person is passed through an apparatus that separates out one particular constituent and returns the remainder to the circulation. It is thus an extracorporeal therapy.
^Katherine, Abel; American Academy of Professional Coders (2013). Official CPC Certification Study Guide. Delmar Cengage Learning. p. 128. ISBN978-1-285-42799-7. OCLC1073648099.