Lab Test

Acetylcholinesterase, Erythrocytes

RBC Cholinesterase, Cholinesterase, Carbamates, Insecticide poisoning, Organo-Phosphate Poisoning

Test Codes

EPIC: LAB6212, Beaker: XACHR, MAYO: ACHS

Department

Send Outs

Instructions

Due to specimen stability, patients can be drawn Monday – Thursday only. For questions, call the Laboratory at 800-551-0488.

Specimen Collection Criteria

Collect: One Lavender-top EDTA tube.

Send specimen for processing immediately after collection. 

Physician Office/Draw Specimen Preparation

Do not centrifuge. Maintain whole blood specimen refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: 4.0 mL whole blood, refrigerated (2-8°C or 36-46°F). (Minimum: 2.5 mL)

Rejection Criteria

  • Frozen specimens.
  • Lipemic Specimens.
  • Hemolyzed specimens.
  • Specimens not collected and processed as indicated.

In-Lab Processing

Do not centrifuge. Maintain whole blood specimen refrigerated (2-8°C or 36-46°F) prior to transport.

Transport: 4.0 mL whole blood, refrigerated (2-8°C or 36-46°F). (Minimum: 2.5 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 72 hours
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Medical Laboratories, Rochester, MN.

Performed

Friday.
Results available in 4-8 days.

Reference Range

31.2 - 61.3 U/g of hemoglobin.

Test Methodology

Spectrophotometric-Thiocholine Production.

Interpretation

Abnormally low activities may indicate exposure to certain insecticides.

Clinical Utility

Red cell cholinesterase is most often used to detect past exposure to organophosphate insecticides with resultant inhibition of the enzyme.

CPT Codes

82482
LOINC:  49230-6

Contacts

Last Updated

6/14/2022

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