PLASMAPHERESIS

n. filtration of blood (Medicine)

Plasmapheresis (from the Greek plasma, something molded, and apheresis, taking away) is the removal, treatment, and return of (components of) blood plasma from blood circulation. It is thus an extracorporeal therapy. The method can also be used to collect plasma for further manufacturing into a variety of medications.
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Plasmapheresis is a blood purification procedure used to treat several autoimmune diseases. [more]Plasmapheresis - Community and Resources

Noun
1. plasma is separated from whole blood and the rest is returned to the donor
(hypernym) apheresis, pheresis

A procedure whereby plasma (which contains proteins, such as antibodies) is separated and removed from the blood and replaced with another solution, such as saline or albumin.