Priming anticoagulant alignment for blood extraction
AssigneeGrifols, S.A.
InventorGreg Flexman
Life of this patent
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Abstract
Methods and devices are described for reducing anticoagulant dilution of collected blood components during blood collection.
Claims5
A method of reducing anticoagulant dilution of collected blood components in a blood processing equipment, wherein the blood processing equipment comprises an anticoagulant reservoir (1) having an anticoagulant solution, a Y-connector and venous access device (5) having a cap (6), a blood component separation device (12), a line of anticoagulant (4) fluidly connecting the anticoagulant reservoir (1) to the Y-connector and venous access device (5), a blood withdraw/return line (7) fluidly connecting the Y-connector and venous access device (5) to the blood component separation device (12), an anticoagulant pump (2) fluidly connected to the line of anticoagulant (4), a liquid/air detector (3) fluidly connected to the line of anticoagulant (4), a withdraw/return pump (11) fluidly connected to the blood withdraw/return line (7), a pressure senor (9) fluidly connected to the blood withdraw/return line (7), and a liquid/air detector (8) fluidly connected to the blood withdraw/return line (7), the method comprising:
- (a) priming and aligning the blood processing equipment with the anticoagulant solution comprising:
- (i)synchronously pumping with pumps (2, 11) to advance the anticoagulant solution from the anticoagulant reservoir (1) until the anticoagulant is detected by the air/fluid sensor (8);
- and
- (ii) synchronously reverse pumping with pumps (2, 11) to clear the line of anticoagulant (4) until an air/anticoagulant interface boundary is present in a priming anticoagulant alignment point (100);
- (b) connecting the venous-access device (5) to a donor;
- (c) withdrawing whole blood from the donor such that the withdrawn whole blood is collected in the blood component separation device (12) for processing;
- (d) separating the withdrawn whole blood into a first blood component and a second blood component in the blood component separation device (12);
- (e) extracting the first blood component from the blood component separation device (12);
- and
- (f)returning the second blood component to the donor through the draw/return line (7).
Dependencies are inferred from the claim text.