Apheresis
The process of removing a specific component from blood and returning the remaining components to the donor, in order to collect more of one particular part of the blood than could be separated from a unit of whole blood. Also called hemapheresis or pheresis. The forms of apheresis include: {{}}Plasmapheresis — to harvest plasma (the liquid part of the blood) Leukapheresis — to harvest leukocytes (white blood cells) Granulocytapheresis — to harvest granulocytes (neutrophils, eosinophils, and basophil) Lymphocytapheresis — to harvest lymphocytes Lymphoplasmapheresis - to harvest lymphocytes and plasma Plateletpheresis (thrombocytapheresis) - to harvest platelets (thrombocytes) Apheresis takes longer than a whole blood donation. A whole blood donation takes about 10-20 minutes to collect the blood, while an apheresis donation may take about 1-2 hours.
* * *
Infusion of a patient's own blood from which certain cellular or fluid elements (plasma, leukocytes, platelets, etc.) have been removed. [G. aphairesis, withdrawal]

* * *

aphe·re·sis .a-fə-'rē-səs n, pl -re·ses -.sēz withdrawal of blood from a donor's body, removal of one or more components (as plasma, blood platelets, or white blood cells) from the blood, and transfusion of the remaining blood back into the donor called also pheresis see plateletpheresis compare plasmapheresis

* * *

aph·e·re·sis (af-ə-reґsis) [Gr. aphairesis removal] any procedure in which blood is withdrawn from a donor, a fluid or solid portion (plasma, leukocytes, platelets, etc.) is separated and retained, and the remainder is retransfused into the donor. Types include erythrocytapheresis, leukapheresis, lymphocytapheresis, plasmapheresis, and plateletpheresis. Called also hemapheresis and pheresis.

Medical dictionary. 2011.

Look at other dictionaries:

  • Apheresis — (Greek: to take away ) is a medical technology in which the blood of a donor or patient is passed through an apparatus that separates out one particular constituent and returns the remainder to the circulation. It is thus an extracorporeal… …   Wikipedia

  • Apheresis — A*pher e*sis (?; 277), n. [L. aphaeresis, Gr. ?, fr. ? to take away; ? + ? to take.] 1. (Gram.) The dropping of a letter or syllable from the beginning of a word; e. g., cute for acute. [1913 Webster] 2. (Surg.) An operation by which any part is… …   The Collaborative International Dictionary of English

  • apheresis — or aphaeresis [ə fer′ə sis] n. [LL aphaeresis < Gr aphairesis < aphairein, to take away < apo , away + hairein, to take] the dropping of a letter, syllable, or phoneme at the beginning of a word (Ex.: cause for because) apheretic adj.… …   English World dictionary

  • apheresis — noun, plural (aphereses) Etymology: from apheresis (as in plasmapheresis) Date: 1977 withdrawal of blood from a donor s body, removal of one or more blood components (as plasma, platelets, or white blood cells), and transfusion of the remaining… …   New Collegiate Dictionary

  • apheresis — noun 1. (linguistics) omission at the beginning of a word as in coon for raccoon or till for until • Syn: ↑aphaeresis • Derivationally related forms: ↑apheretic, ↑aphaeretic (for: ↑aphaeresis) …   Useful english dictionary

  • apheresis — См. afèresi …   Пятиязычный словарь лингвистических терминов

  • apheresis — apheretic /af euh ret ik/, adj. /euh fer euh sis/ for 1; /af euh ree sis/ for 2, n. 1. Also, aphaeresis. the loss or omission of one or more letters or sounds at the beginning of a word, as in squire for esquire, or count for account. 2. Med. the …   Universalium

  • apheresis — noun a) The removal of blood from a patient in order that certain components (such as platelets) may be removed before transfusion back to the donor. b) The loss of letters or sounds from the beginning of a word, such as the development of from …   Wiktionary

  • apheresis — [ɛɪfə ri:sɪs] noun 1》 Linguistics omission of the initial sound of a word, as when he is is pronounced he s. 2》 Medicine a technique by which a particular substance or component is removed from the blood. Origin C16: via late L. from Gk… …   English new terms dictionary

  • apheresis — a•pher•e•sis or aphaeresis [[t]əˈfɛr ə sɪs[/t]] n. ling. the loss or omission of one or more letters or sounds at the beginning of a word, as in squire for esquire or count for account[/ex] • Etymology: 1605–15; < LL aphaeresis < Gk… …   From formal English to slang

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”