Patent ID: 6451203
Filing Date: 2002-09-17
Classification: A61M,B01D,B04B

Abstract:
A blood processing system comprisinga centrifugal separation device rotatable about a rotational axis, an inlet path operable to convey whole blood into the separation device for separation into red blood cells and a plasma constituent, the whole blood in the inlet path having an actual whole blood hematocrit value, an outlet path operable to remove plasma constituent from the separation device at least in part while whole blood is conveyed into the separation device, an outlet path operable to remove red blood cells from the separation device at least in part while whole blood is conveyed into the separation device and plasma is removed from the separation device, and a controller including a stage operable at least in part while whole blood is conveyed into the separation device and plasma and red blood cells are removed from the separation device, to generate a derived hematocrit value representing an apparent hematocrit of whole blood entering the separation device based, upon at least one operating condition and without sensing the actual whole blood hematocrit value.