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Cholinesterase, RBC and Plasma

Item Value
Approval req'd? No
Available Stat? No
Test code CPR
Test group Cholinesterase
Performed by Quest
Sendout? Yes
Method Enzymatic, colorimetric
Collection Instructions Transport immediately to laboratory
Container type Lavender top x2
Amount to Collect 6 mL blood
Sample type EDTA whole blood AND EDTA Plasma
Preferred volume 3 mL blood
3 mL plasma
Min. Volume 2 mL blood
2 mL plasma
UCSF Rejection Criteria Hemolyzed or lipemic sample(s)
Processing notes Centrifuge one tube within one hour of collection and pour off separated plasma into a plastic tube. Avoid hemolysis. Do not send packed cells. Send whole blood and plasma samples refrigerated. Order Quest test # 338 and if patient is Brown & Toland, order LabCorp test # 214007
Ref Lab Rejection Criteria Sample received either frozen or at room temperature. Failure to provide both plasma and whole blood sample.
Units IU/L
Normal range
RBC Cholinesterase 9572-15031 IU/L Plasma cholinesterase:
Male 3334-7031 IU/L
Female 2504-6297 IU/L
Synonyms Acetylcholinesterase; organophosphate p; oisoning
Turn around times Test run Monday-Friday. Turnaround time: 1-4 days.
Additional information Decreased in organophosphate poisoning.

Hemolysis can lead to apparent increases in plasma cholinesterase activity, and could mask an enzyme deficiency.
CPT coding 82482-90, 82480-90
LOINC code 2099-0
Last Updated 10/2/2010 11:51:33 AM
Entry Number 197
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