Multi-unit blood processor with volume prediction

Apparatus for predicting the volume of a separated component from a composite fluid comprising:

• a rotor having at least one separation cavity and at least one collection cavity for centrifugally separating the composite fluid into a first separated component and at least a second separated component;
• a pressure sensor in a wall of the separation cavity, the pressure sensor comprising a flexible membrane that moves in response to pressure changes in the cavity and such membrane being connected to a pressure transducer;
• an expandable chamber in the at least one separation cavity, the expandable chamber being connected to a hydraulic circuit, wherein a pressure gauge is connected to the hydraulic circuit for measuring hydraulic pressure therein;
• a separation bag containing a composite fluid in the at least one separation cavity, wherein the pressure sensor detects a pressure amount due to the composite fluid in the separation bag;
• at least one collection bag in the collection cavity;
• tubing connecting the separation bag to the at least one collection bag;
• a first sensor for detecting components in the tubing;
• a second sensor for detecting changes in separated components in the separation bag;
• a controller for:
• predicting the volume of the composite fluid from the pressure amount detected by the pressure sensor;
• determining the volume of any separated component passing from the separation bag through the tubing to the collection bag from the detections by the first and second sensors;
• and
• predicting the volume of any separated component remaining in the separation bag from the volume prediction of the composite fluid and the volume prediction of the separated component passing from the separation bag to the collection bag.