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US 5,154,716 AGranted
Bottom blood bag separation system
AssigneeMiles Inc.
InventorsRonald H. Bauman, Donald R. Denton, William W. Dupin, Edward J. Nelson, Eva Sajan
Life of this patent
Estimating the term…
Abstract
Plastic blood bag system including a bag having a generally longitudinal seal extending from the top of the bag and between two blood bag ports downwardly to at least the lower half of the bag but not to the bottom of the bag, thereby leaving the sole passageway within the bag and between two ports located in the lower half of the bag.
Claims10
A method of separating a blood product into useful components comprising the sequential steps of
- (a) introducing the blood product into a blood bag having at least two ports at the top of the bag and a longitudinal seal extending downwardly from the top of the bag and between the two ports to at least the lower half of the bag, wherien a channel is formed on one side of the longitudinal seal;
- (b) centrifuging the blood to separate the blood into an upper less dense portion and a lower more dense portion, and;
- (c) expressing the more dense portion out of the bag from the lower portion of the bag via the channel and a port with which the channel communicates.
A method of preparing platelets from whole blood comprising the sequential steps of
- (a) introducing whole blood into a blood bag having at least two ports at the top of the bag and a longitudinal seal extending downwardly for the top of the bag and between the ports to the lower half of the bag, wherein a channel is formed on one side of the longitudinal seal;
- (b) centrifuging the bag and its whole blood contents to form a lower more dense portion of red blood cells, an upper less dense portion of plasma and an intermediate buffy coat portion comprising platelets and while blood cells;
- (c) expressing the plasma portion out of the bag via one of the ports at the top of the bag and on one side of the longitudinal seal and expressing the red blood cell portion out of the bag via the channel on the other side of the longitudinal seal and a port with which the channel communicates;
- (d) then subjecting the remaining buffy coat portion to conditions sufficient to separate platelets from the buffy coat portion.
1 more element
Dependencies are inferred from the claim text.