Test Overview
Test Methodology

Photometric, Acetylthiocholine Substrate

Test Usage

Monitoring for exposure to organophosphorus insecticides. Monitoring patients with liver disease, particularly those undergoing liver transplantation. Identifying those patients with an atypical gene who have low levels of cholinesterase which is not inhibited by dibucaine. These individuals are sensitive to the muscle relaxant succinylcholine since they are unable to hydrolyze it rapidly.

Reference Range *

Reference values have not been established for patients that are less than 18 years of age. Males: >or=18 yrs: 3,100 - 6,500 U/L; Females: 18-49 yrs: 1,800 - 6,600 U/L; >or=50 yrs: 2,550 - 6,800 U/L.

Test Details
Days Set Up
Daily
Analytic Time

1 - 2 days

Soft Order Code
PCHE
MiChart Code
Pseudocholinesterase (PCHE) Total (Sendout)
Synonyms
  • Insecticide poisoning
  • Nerve gas poisoning
  • Cholinesterase
  • PCHE
Laboratory
Sendout
Reference Laboratory
Mayo PCHE1
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. For cases of prolonged apnea following surgery, wait 24 hours before obtaining specimen. SST tube must be spun within 2 hours of collection.

Yellow Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.25 mL serum
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
82480
Fee Code
20726
LOINC
9509-1
NY State Approved
No