Читать книгу Transfusion Medicine - Jeffrey McCullough - Страница 167

This multiple‐component collection system uses continuous separation with fluid flows controlled by a pneumatic pump system and internal sensors to monitor the weight of blood, fluids, and collection components [31, 33, 34]. The plastic, disposable, rigid‐wall separation chamber and cassette interfaces with the pneumatic pump to control fluid flows. A leukodepletion filter is part of the system, and the instrument automatically adds the red cell preservative. Although separation is continuous, blood flow from the donor is intermittent, with plasma being returned after withdrawal of about 300 mL of whole blood. The Alyx can produce two units of red cells in about 35 minutes [31] or up to four units of plasma in less than 45 minutes. The Alyx can also produce combinations of components, for example, one unit of red cells with up to three units of plasma.