Home Glossary Letter C clotting time
clotting time
Medical term Processing
The time a serum tube stands at room temperature, as the tube maker specifies, so the clot forms fully before centrifuging; spinning too early leaves fibrin.
Related terms fibrin Protein threads formed from fibrinogen during clotting that bind platelets and blood cells into a clot. serum The liquid left after blood clots and is centrifuged; it lacks the clotting factors used up in the clot… Category B infectious substance Shipping class for specimens that may hold infectious agents but are not high risk; labeled UN3373 and… centrifugation Spinning specimens to separate cells from serum or plasma, using the tube maker's time and speed; serum… centrifuge Machine that spins tubes fast to separate serum or plasma from cells. Load matched, balanced tubes; open the… chain of custody Signed, dated record of each person who has a specimen, from collection to disposal, so a forensic or… critical value A result showing a possibly life-threatening condition (a panic or alert value); the lab must tell the… Custody and Control Form CCF: the federal form that documents a workplace drug-test specimen's chain of custody, from the employee to… dead volume Extra sample an analyzer needs to pipet accurately, beyond the volume the test itself uses; part of a test's… icterus Dark yellow serum or plasma caused by high bilirubin; bilirubin in icteric samples can falsely lower some… Study Processing
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