Patent ID: 7182865
Filing Date: 2007-02-27
Classification: A61M

Abstract:
1. A device for separating whole blood into an erythrocyte concentrate and thrombocyte-containing plasma under gravitational force, comprising a first blood bag receiving whole blood, a plasma filter, which is divided into a blood chamber and a plasma chamber by a membrane that holds back erythrocytes and lets thrombocytes through, the blood chamber having a first connector and a second connector, and the plasma chamber having a further connector, a first tube line which extends from the first blood bag and is connected to the first connector of the blood chamber, a leukocyte filter which removes microaggregates and leukocytes, a second tube line which extends from the second connector of the blood chamber and is connected to a second blood bag, a third tube line which extends from an outlet of the plasma chamber and is connected to a plasma bag, a fourth tube line which extends from the first connector of the blood chamber and is connected to a third blood bag, and a first shut-off device for the first tube line, and a second shut-off device for the second tube line, and a third shut-off device for the fourth tube line, wherein in a first step, the second blood bag is arranged gravimetrically below the plasma filter, and a first streaming path extends from the first blood bag through the blood chamber to the second blood bag with the first shut-off device and the second shut-off device being opened, and the third shut-off device being closed, and in a second step, a second streaming path extends from the second blood bag, which is arranged gravimetrically above the plasma filter, through the plasma filter to the third blood bag, with the first shut-off device being closed and the second shut-off device and the third shut-off device being opened, said second streaming path being in opposite direction to the first streaming path.