apheresis

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Related to pheresis: phoresis

apheresis

(əfĕr`əsĭs), or

hemapheresis

(hē'məfĕr`əsĭs), any procedure in which bloodblood,
fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
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 is drawn from a donor or patient and a component (platelets, plasmaplasma,
in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion). It is electrically conductive and is affected by magnetic fields.
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, or white blood cells) is separated out, the remaining blood components being returned to the body. Apheresis allows the donor's blood volume to replenish itself much more quickly than whole blood donation. One type of apheresis, plasmapheresis, is commonly used in commercial blood banksblood bank,
site or mobile unit for collecting, processing, typing, and storing whole blood, blood plasma and other blood constituents. Most hospitals maintain their own blood reserves, and the American Red Cross provides a nationwide collection and distribution service.
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. In plasmapheresis the plasma (the liquid portion of the blood) is separated from donated blood, the red blood cells being returned to the donor. In some diseases, such as myasthenia gravismyasthenia gravis
, chronic disorder of the muscles characterized by weakness and a tendency to tire easily. It is caused by an autoimmune attack on the acetylcholine receptor of the post synaptic neuromuscular junction.
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, plasmapheresis is used to attempt to remove the disease-causing substances from the blood.
References in periodicals archive ?
it's just a matter of positioning," the pheresis nurse
Optimization of peripheral blood stem cell collections using peripheral blood CD34 levels and routine high volume pheresis.
117) The court suggested that because Christian's doctor was currently prescribing a regimen of drugs and exercise to treat her condition, the pheresis was merely "optional," not a required treatment that would invoke the ADA's protections.
The United States District Court for the Northern District of Indiana granted summary judgment - a hearing based on the facts of a case without a trial - to the hospital ruling that Christian's condition was not a disability and that pheresis was a treatment option, not a requirement.
Plasma pheresis separates the plasma from other blood components and is retained while the other blood components are returned to the donor through the same needle.
In November 1983, Charlotte again returned to Mayo, her skin blistered from a reaction to the D-penicillamine and her itching more persistent than ever because she had weaned herself from the pheresis machine.
The NHS Wales Shared Services Partnership, hosted by Velindre NHS Trust are acting on behalf of Cardiff and Vale ULHB who are seeking to establish a contract for the supply of Plasma Pheresis Consumables and free on loan Equipment used by the Nephrology and Transplant department to separate blood cells and plasma.
Today, MIMA's monthly transfusion average is 150 leukoreduced RBCs, 15 platelet pheresis units, and two to four fresh-frozen plasmas.
The book also includes discussions of specialized blood products such as leukocyte-reduced blood products, cytomegalovirus-reduced risk blood products, granulocyte transfusions, platelets and platelet pheresis, immunoglobulins, and fibrin sealants.
Because platelets are in critical supply, the Red Cross is urgently seeking platelet pheresis donors and is expanding the hours of three donor centers to accommodate these special donations.
We provide approximately 4,000 red blood cell units, 2,000 random and pheresis platelet units, and 1,700 fresh-frozen plasma units to our patients every year.