Test Overview

Test Methodology

Spectrophotometric-Thiocholine Production

Test Usage

Detection of exposure to organophosphatase inhibitors (insecticide poisoning).

Reference Range*

31.2 - 61.3 U/g hemoglobin

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Monday, Thursday

Analytic Time

5 - 7 days

Soft Order Code


MiChart Code

Acetylcholinesterase, Erythrocytes



Cholinesterase, Erythrocytes
Cholinesterase, RBC
Acetylcholinesterase, Erythrocytes
Insecticide Poisoning
Organophosphate Poisoning
Carbamate Poisoning
Pesticide Poisoning

+ See More



Laboratory Reference

Mayo ACHS (8522)

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Specimen Requirements

Offsite Collection Instructions

Collect specimen in a lavender top tube. Refrigerate and send intact whole blood within 24 hours of collection.


Lavender Top Tube

Normal Volume

5 mL EDTA whole blood

Minimum Volume

2.5 mL EDTA whole blood

Additional Information

Test sent to Mayo Medical Laboratories.

Billing Information

Fee Codes

CPT Code


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