Specimen:

Serum

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

2 ml; red top or 0.4 ml microtube

Testing
Schedule:

24 hrs/day, 7 days a week, including holidays.

Analytic Time:

3 hours (upon receipt in laboratory)

Reference Range:

3167 - 6333 u/l

Comments:

Availability:  As needed.

Test
Limitations:

Criterion: recovery ± 10% of initial values
Icterus: No significant interference up to an I index of 60 
(approximate unconjugated bilirubin concentration: 60 mg/dl).
Hemolysis: Significant interference. RBCs contain acetylcholinesterase,
thereby causing contamination.
Lipemia (Intralipid): No significant interference up to an L index of 
1000 (approximate triglycerides concentration: 2000 mg/dl). There is 
poor correlation between turbidity and triglycerides concentration.

Methodology:

Spectrophotometric

Sample
Processing:

Centrifuge at 3000 RPM for 10 minutes.
Aliquot serum into labeled container and cap.

Sample
Storage:

Refrigerate.

Transport
Instructions:

Place specimen into zip-lock type bag, seal bag.
Place requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.

CPT Code:

82480

See also:
Red Blood Cell Cholinesterase, Whole Blood