PROPRIETARY INFORMATION
CONFIDENTIAL MATERIAL
Assays/Reagents Not for Customer Distribution
88
AEROSET
®
System Troubleshooting Guide
94816-107—November 2004
Specimen Collection and Handling
In the SPECIMEN COLLECTION AND HANDLING section of
the package inserts, many state: “Separate from red blood cells
as soon after collection as possible”.
To clarify a reasonable time period for “as soon as
possible”, Tietz Textbook of Clinical Chemistry, 2nd ed. uses
the same verbiage but adds “..., and certainly within two
hours”.
Reference: Laessig RH, et al. Changes in serum chemical
values as a result of prolonged contact with the clot. Am J
Clin Pathol 1986 Mon;66(#):598–604.
Serum should be separated within two hours of collection, and
prolonged contact of serum with the clot will affect potassium,
glucose, and ammonia results.
Reference: McClatchey KD, editor. Clinical Laboratory
Medicine, 1st ed. Philadelphia, PA: Lippincott, Williams,
and Wilkins, 1994:85.
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