Whole blood control sample
AssigneeBiotrack, Inc.
InventorsJames L. Hill, Laura J. Winfrey
Life of this patent
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Abstract
A whole blood control sample and a method of preparing the sample are disclosed. The method comprises collecting a whole blood sample from one or more donor, separating each sample into red blood cells and plasma, fixing the red blood cells, mixing the fixed red blood cells with plasma from the same or a different donor to produce a suspension, quick-freezing the suspension before the red blood cells can settle, and lyophilizing the frozen suspension. The control sample therefore comprises a lyophilized mixture of fixed red blood cells and plasma solids.
Claims22
A whole blood control sample, which comprises:
- a lyophilized mixture comprising (1) fixed red blood cells, and (2) plasma solids including coagulation factors capable of producing clotting, wherein said mixture prior to lyophilization comprises 30-55% fixed red blood cells and 70-45% plasma.
A method of preparing a whole blood control sample, which comprises:
- collecting a whole blood sample from one or more donors;
- separating each whole blood sample into red blood cells and plasma;
- fixing said red blood cells;
- mixing said fixed red blood cells with plasma from the same or a different donor to produce a suspension containing 30-55% fixed red blood cells and 70-45% plasma including coagulation factors capable of producing clotting;
- quick-freezing said suspension before said red blood cells can settle;
- and
- lyophilizing said frozen suspension.
Dependencies are inferred from the claim text.