Systems and methods for on line finishing of cellular blood products like platelets harvested for therapeutic purposes

• US 6,872,307 B2
• Filed: 05/06/2003
• Issued: 03/29/2005
• Est. Priority Date: 02/23/1996
• Status: Expired due to Fees

• Current Assignee: Fenwal Incorporated (Fresenius SE & Co. KGaA)
• Original Assignee: Baxter International Inc.
• Inventors: Bischof, Daniel F.
• Primary Examiner(s): KIM, SUN U
• Application Number:
  US10/430,785
• Publication Number:
  US 20030205517A1
• Time in Patent Office: 693 Days
• Field of Search: 210/781, 210/782, 210/109, 210/252, 210/257.1, 210/258, 210/295, 210/435, 210/512.1, 494/35, 494/37, 494/36, 494/43, 604/4.01, 604/5.01, 604/6.01, 604/6.03
• US Class Current: 210/258
• CPC Class Codes: A61M 1/3693 using separation based on different densities of components, e.g. centrifuging
• CPC Class Codes: A61M 1/3696 with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
• CPC Class Codes: A61M 2202/0057 retained by adsorption
• CPC Class Codes: A61M 2202/0071 product to be retained or harvested, e.g. by pheresis
• CPC Class Codes: A61M 2202/0427 Platelets; Thrombocytes
• CPC Class Codes: A61M 2202/0439 White blood cells; Leucocytes

Abstract

Blood processing systems and methods establish on line communication between a container and a source of blood containing leukocytes and platelets, such as a human donor. The systems and methods create a centrifugal field between the source of blood and the container that separates from the blood an unfinished suspension of platelets having a first physiologic characteristic different than the desired physiologic characteristic. The systems and methods pump the unfinished platelet suspension outside the centrifugal field through a finishing device. The finishing device changes the first physiologic characteristic to the desired physiological characteristic, thereby creating the finished platelet suspension. The systems and methods convey the finished platelet suspension from the finishing device directly into the container. The systems and methods function without interrupting the on line communication between the container and the source of blood.

Claims

1. A blood processing system comprising

a storage container,

a centrifugal separation device that, in use, creates a centrifugal field that separates from blood a suspension of platelets having a first leukocyte concentration that is higher than a desired leukocyte concentration, the centrifugal field creating pressure,

a finishing device communicating with the centrifugal separation device outside the centrifugal field that, upon contact with the suspension of platelets having the first leukocyte concentration, reduces the leukocyte concentration to the desired leukocyte concentration, thereby creating a finished platelet suspension, and

a pump between the centrifugal separation device and the finishing device that, in use, pumps the suspension of platelets having the first leukocyte concentration from the centrifugal separation device directly through the finishing device under pressure from the centrifugal field and

that conveys the finished platelet suspension from the finishing device directly into the storage container.