Method for preparing platelet rich plasma and concentrates thereof
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United States of America Patent
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Jan 31, 2012
Grant Date -
May 5, 2011
app pub date -
Jan 10, 2011
filing date -
Feb 7, 2005
priority date (Note) -
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Abstract
A process for separating platelet rich plasma from a blood sample using a platelet rich plasma separator system is disclosed. The system includes an inner wall having a top edge and a central axis that is surrounded by a depth filter having a capacity to receive all of the erythrocytes in the blood sample, where an inner surface of the inner wall has an angle of about 0.2° from the central axis of the inner wall. The process includes spinning the inner cylinder at its central axis at a speed that separates the erythrocytes from plasma and platelets and causes the erythrocytes to collect against an inner surface of the depth filter. The cylinder is continually spun for a sufficient time to allow substantially all of the erythrocytes to flow up the inner surface and over the top edge into the depth filter, leaving platelet enriched plasma (PRP) in the inner cylinder, such that upon discontinuing the spinning, permits the platelet enriched plasma to flow to the bottom of the inner cylinder.
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