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Preparation of Platelet Poor Plasma for Special Coagulation Testing

Evaluate Specimen

Slide 2

October 2008

A coagulation specimen arrives for processing before certification; take a moment to evaluate your specimen. Sodium citrate tubes must be filled to at least 90%  full and it is easy to create a sample tube for comparison like calculating 90% of the blood volume, for example; if you use  4.5mL tubes, fill a sodium citrate tube with 4.05mL of colored liquid; 4.05 is 90% of 4.5mL.  Under-filled tubes should be rejected because the proportion of the anticoagulant plasma will be incorrect and could lead to misleading test results.

Check for clots by inverting the specimen gently; reject any specimens with observed clots.

Evaluate Specimen


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