Cholinesterase, RBC

Alphabetical Test listing

Cholinesterase, RBC-994

Cholinesterase, RBC
Acetylcholinesterase, RBC
Cholinesterase I
Cholinesterase, erythrocytic
RBC cholinesterase
Red Cell Cholinesterase
True Cholinesterase

Erythrocyte cholinesterase is measured to diagnose organophosphate and carbamate toxicity and to detect atypical forms of the enzyme. 

EDTA whole blood
5.0 mL
1.0 mL

Lavender (EDTA), 4mL


Ambient (preferred) - 14 days

Refrigerated - 14 days

Frozen - NO

  • Plasma specimen
  • Anticoagulants other than EDTA
  • Frozen whole blood received
  • Hemolysis
LabCorp Burlington (007286): R-NX
Mo - Sa
1 - 3 days

Spectrophotometry (Ellman) - kinetic


5300 - 10,000 IU/L


Cholinesterase is irreversibly inhibited by organophosphate insecticides and reversibly inhibited by carbamate insecticides. Serum or plasma pseudocholinesterase is a better measure of acute toxicity, while erythrocyte levels are better for chronic exposure (serum level returns to normal prior to normalizing of red cell level).

Result 2099-0