Liquid purification or separation – Gravitational separator
Patent
1991-06-05
1992-08-25
Dawson, Robert A.
Liquid purification or separation
Gravitational separator
210206, 210514, 210515, 604408, 604410, B01D 2100
Patent
active
051416450
ABSTRACT:
A method for the separation of blood into the components and apparatus thereof, characterized by subjecting the blood to strong centrifugation thereby separating said blood into an upper layer (A) of platelet-deficient blood plasma, an intermediate layer (B) of a mixture of platelets and white blood corpuscles, and a lower layer (C) of a red blood corpuscle concentrate, adjusting the hematocrit value of said red blood corpuscle concentrate of (C) to not more than 80% by diluting said red blood corpuscle concentrate with part of said platelet-deficient blood plasma of (A), and subjecting said mixture of (B) to weak centrifugation thereby separating said mixture into a lower layer of white blood corpuscles and an upper layer of a platelet concentrate, and if desired, subjecting the remaining platelet-deficient blood plasma to the treatments of freezing, thawing, and centrifugation thereby separating said platelet-deficient blood plasma into cryoprecipitate and cryoprecipitate-deficient blood plasma, and anaratus therefor.
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Kawaoka Tatsuhiko
Kitagawa Akiko
Oonaka Yukihiro
Shiraki Hiroshi
Yamamoto Kiyoko
Dawson Robert A.
Kim Sun Uk
Terumo Corporation
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