Test Overview
Test Methodology
Polyacrylamide Electrophoresis
Test Usage
The presence of AChE in amniotic fluid is positive for a neural tube defect (open tube defects, and to a lesser degree, ventral wall defects) if fetal contamination can be ruled out.
Reference Range *
Negative
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Limitations
A bloody tap may cause a false positive result.
Test Details
Days Set Up
Tuesday, Thursday
Analytic Time
6 - 9 days
Soft Order Code
ACHE
MiChart Code
Acetylcholinesterase, Amniotic Fluid
Synonyms
- AChE-AF
Laboratory
Sendout
Reference Laboratory
Mayo ACHE_ (9287)
Section
Special Testing
Specimen Requirements
Collection Instructions
Submit 1 ml of uncentrifuged amniotic fluid. Refrigerate. A specimen from the 16-18 week gestational period of pregnancy is preferred; from the 14-21 week is acceptable. GESTATIONAL AGE IS REQUIRED ON THE REQUISITION FOR PROCESSING.
Normal Volume
1 mL amniotic fluid
Minimum Volume
0.3 mL amniotic fluid
Additional Information
Test sent to Mayo Medical Laboratories.
Billing
CPT Code
82013
Fee Code
20454
NY State Approved
No
