The key filtration technique is via the membrane. This filters the plasma and locks the waste fluid inside the membrane. It has been designed to only allow the very small species through it and therefore all cells can be maintained to the benefit of the patient. Due to this process cell species recovery is attained and this includes the proteins and clotting factors. The filter membrane is the control membrane of the system and the unique pore size for this important element of the device has been selected to ensure that no cellular components of the blood product can pass into the super absorber during use. The unique pore size is small enough to permit efficient fluid transport into the super absorber, but is too restrictively small to permit the passage of even the smallest intact cells, i.e. the platelets.
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