Plasmapheresis is a purification technique whereby whole blood is drawn from the patient through a vascular access. The plasma is separated by centrifugation or filtration.
In the filtration processes, the plasma is separated from the corpuscular elements in a plasma filter by applying a transmembrane pressure. The plasma with all the substances it contains is removed
A replacement solution, or plasma from a donor, is mixed with the corpuscular part circulating after the plasma filter and the regenerated blood is reinfused to the patient.