System and method for optimized apheresis draw and return

摘要

A blood processing device includes a venous-access device, a blood component separation device, a return line, a draw line, a first pressure sensor, a second pressure sensor, and a first pump. The first pressure sensor is located on the return line between the blood component separation device and the venous-access device, and determines a first pressure. The second pressure sensor is located on the draw line between the blood component separation device and the venous-access device, and determines a second pressure. The first pump is connected to at least one of the return line and the draw line and controls a flow rate within the connected line based on a subject access pressure determined based upon the first and second pressures.

主权项

1. A method of collecting and exchanging blood components using blood processing equipment comprising:
inserting a venous-access device into a subject, the venous-access device fluidly connected to a blood separation device; withdrawing blood from the subject such that the drawn blood is collected in a the blood component separation device for processing; separating the withdrawn blood into a first blood component and a second blood component using the blood component separation device; extracting the second blood component from the blood component separation device; returning the first blood component to the subject through a draw/return line; measuring a first pressure within the draw/return line using a first pressure sensor, the first pressure sensor being located on the draw/return line between the venous-access device and the blood component separation device; measuring a second pressure within the draw/return line using a second pressure sensor, the second pressure sensor being located on the draw/return line between the venous-access device and the first pressure sensor; and controlling a flow rate within the draw/return fluid line based on a subject access pressure determined using the first pressure and the second pressure.