Patent ID: 11864553
Assignee: FENWAL, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B | IPC A  B

Claim 7:
8. The method of claim 1 comprising:
a) separating about 400-500 ml of anticoagulated whole blood to provide about 150-250 ml of concentrated red blood cells and a supernatant component comprising at least one of plasma and anticoagulant;
b) removing by centrifugation substantially all of said supernatant to provide an initial red blood cell concentrate volume of about 150-250 ml and about 10-30 ml of remaining supernatant;
c) combining said initial red blood cell concentrate with about 100-300 ml of said chloride-free, additive solution to provide an intermediate red blood cell product;
d) separating by centrifugation said intermediate red blood cell product to provide about 150-250 ml of concentrated red blood cells and a supernatant component comprising at least plasma, anticoagulant and said additive solution;
e) removing substantially all of said supernatant component from said intermediate red blood cell product to provide a treated red blood cell concentrate comprising about 150-250 ml of red blood cells and about 10-30 ml of remaining supernatant; and
f) combining said treated red blood cell concentrate with about 100-150 ml of said chloride-free, additive solution to provide a final red blood cell product wherein the percentage of plasma in said supernatant component is no greater than 15%.