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 ?
The Red Cross does a very good job of scheduling the plasma pheresis appointments.
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.
Platelets are donated through a unique process called pheresis (fur-ee-sis).
Pheresis donors are highly committed and may have undergone histocompatibility testing for matching with a specific patient.
WHAT: The Power of Giving -- A Tribute to the Area's Super Blood Donors -- Pheresis Donors WHY: It takes a very special person to drop his or her plans on 24 hours or less notice in order to spend 2 1/2 hours with needles in both arms donating infection-fighting white blood cells or platelets to keep a total stranger alive.
Platelet pheresis donors, who help cancer patients, are also urgently needed.
MasterGuard Anti-Stick Needle Protector is the only guarded pheresis needle proven to reduce needlestick injuries, as compared to conventional, unguarded needles.
BCA is particularly excited about the application of the pocH-100i in blood center fixed sites and mobile units where platelet pheresis procedures are performed.
The parties' dispute concerned contracts entered into in the early 1990s for the provision of pheresis equipment used in Red Cross blood centers.
BitMedical Gmbh (Blood Interventional Technologies), Switzerland provides equipment and disposables for cell washing plasma pheresis, platelet pheresis, platelet gel and heparin management for anesthesiologists, surgeons and blood banks.
The add-on module uses a novel new push-pull pheresis technique to extract large volumes of plasma which are treated by hepatocytes and returned to the patient.
Located at Alta Bates' Herrick Campus, the new outpatient facility is designed to offer a full range of diagnostic and therapeutic cancer services, including radiation therapy, chemotherapy, pheresis, bone marrow transplantation, and outpatient surgery, as well as psychological counseling and social services.