Home Glossary Letter A aliquot
aliquot
Medical term Processing
A portion of serum, plasma or urine transferred from the original tube into a labeled secondary tube, so several tests or sites can share one specimen.
Related terms plasma The liquid part of unclotted blood, separated by centrifuging a tube that contains an anticoagulant; it… serum The liquid left after blood clots and is centrifuged; it lacks the clotting factors used up in the clot… analytical phase The testing step itself, when the instrument or test system measures the specimen. buffy coat Narrow whitish band of white cells and platelets resting between packed red cells and plasma after an… 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… clotting time The time a serum tube stands at room temperature, as the tube maker specifies, so the clot forms fully… critical value A result showing a possibly life-threatening condition (a panic or alert value); the lab must tell the… Study Processing
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