| 摘要 |
The apparatus centrifugally separates blood into plasma-rich and plasma-poor components the latter being returned to donor. A self-balancing centrifuge is used immediately adjacent the donor. The blood pathway is completely disposable and includes a phlebotomy needle (16) and blood-compatible tubing connecting to a flexible blood processing bag (50) supported within a contoured processing chamber between shoes (74,78) in the centrifuge rotor (94) so that second blood component travels along a short internal bag dimension to achieve separation. Blood from the donor is pumped by pump (36) under control of weight and pressure detectors (32 and 34) to the bag (50) via tubing (41 and 49) and tubing (49) is cut and sealed. A displacement chamber (69) provides a fluid operated diaphragm to express separated first blood component from the bag (50) through tubing (60) into receiver container (61) as the centrifuge rotor spins. Expressing fluid is supplied via tubing (92) from station (93). Piston and cylinder (95) operates fluid clamp (142). The centrifuge can then be stopped to allow return of second blood component to donor via spike (46 min ) plugged into an outlet port in the bag (50) when displacement chamber (69) is further operated. Further spike (46) allows the corresponding return of a further plasma-poor fraction to the donor, by pump (38) through spike (46 min ) after a further contribution fed into the bag (50). |
