Pumped-filter blood-processing apparatus and methods

Apparatus for processing at least two blood components, the apparatus comprising:

• a. a source of at least two blood components;
• b. collection means for collecting the at least one blood component;
• c. means for separating the blood components;
• d. a controllable pump for directing the blood components to the collection means;
• e. a filter for filtering at least one blood component prior to collection, the filter having an internal volume, at least one separated component following a flow path from the separating means through the filter and into the collection means;
• f. means for measuring pressure into the filter;
• g. feedback means for controlling the pump based on the measured pressure;
• h. means for containing a liquid;
• and
• i. means for selectably coupling to the flow path and flowing the liquid therethrough to substantially displace the at least one blood component from the internal volume of the filter.

A method of processing at least two blood components, the method comprising the steps of:

• a. providing a source of the at least two blood components and a filter;
• b. flowing at least one blood component from the source to the filter;
• c. filtering each of the at least two blood components separately and, during said filtration, measuring pressure into the filter;
• d. controlling the flow based on the measured pressure and the blood component being filtered;
• and
• e. separately collecting each of the at least two blood components.

A method of processing at least one blood component, the method comprising the steps of:

• a. providing a source of the at least one blood component and a filter therefor, the filter having an internal volume;
• b. flowing the at least one blood component from the source to the filter;
• c. filtering at least one blood component and, during said filtration, measuring pressure into the filter;
• d. controlling the flow based on the measured pressure;
• and
• e. pumping a liquid through the filter to substantially displace the at least one blood component from the internal volume of the filter.