ACHE_ - Specimen: Acetylcholinesterase, Amniotic Fluid (AChE-AF), Amniotic Fluid

Test Catalog

Test Name

Test ID: ACHE_    
Acetylcholinesterase, Amniotic Fluid (AChE-AF), Amniotic Fluid

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

 

Specimen Type Describes the specimen type validated for testing

Amniotic Fld

Additional Testing Requirements

If chromosome studies are also requested, see CHRAF / Chromosome Analysis, Amniotic Fluid for specimen requirements. When requested with chromosome analysis, the specimen cannot be frozen.

Necessary Information

Gestational age at amniocentesis is required.

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Container/Tube: Amniotic fluid container

Specimen Volume: 1 mL

Collection Instructions: A specimen from the 14 to 18 week gestational period of pregnancy is preferred. Amniotic fluid from the 14 to 21 week gestational period is acceptable.

Forms

1. Second Trimester Maternal Screening Alpha-Fetoprotein (AFP)/QUAD Screen Patient Information (T595) is required; see Special Instructions.

2. Biochemical Genetics Patient Information (T602) in Special Instructions.

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

0.3 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Hemolysis

Mild OK; Gross OK

Lipemia

NA

Icterus

Mild OK; Gross OK

Other

NA

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
Amniotic FldRefrigerated (preferred)365 days
 Frozen 365 days
 Ambient 14 days