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Preanalytic Variables in Special Coagulation Testing

Clinical Implications

Clotted Specimen: Definition of Clotted Specimen

Slide 14

October 2008

A question commonly asked is “How large does the clot need to be in order for such artifactual results to occur?” There are no validation studies looking at the size of a clot within a tube and its affect on clotting factor assays. So for practical purposes a clot found within a specimen tube should be considered as a clotted specimen.

Definition of Clotted Specimen


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