| 摘要 |
A blood processing device for collecting and exchanging blood components includes a venous-access device for drawing whole blood from a subject and returning unused blood components to the subject. The system may also include a blood component separation device that separates the drawn whole blood into a first blood component and a second blood component. The blood component separation device may also be configured to send the second blood component to a second blood component storage container. The system may use a return line that fluidly connects the venous-access device and the blood component separation device to return the first blood component to the subject. The system may also have a first and second pressure sensor located on the return line. The first pressure sensor may be located between the blood component separation device and the venous-access device and may determine a first pressure within the return line. The second pressure sensor may be located on the return line between the first pressure sensor and the venous-access device and may determine a second pressure within the return line. A pump connected to the return line may control the return flow rate within the return line based on a subject access pressure determined based on the first pressure and the second pressure. |
