Laboratory Test Information Guide

Details for Amniotic Fluid

Test Name: Amniotic Fluid
Alternate Name(s): Chromosome Analysis
QF-PCR
Microarray
Laboratory: Cytogenetics (VH)
Specimen Type: 20 mL of amniotic fluid for QF-PCR, Microarray (if required) and back up culture (additional sample if external testing required)

3mL EDTA Maternal Blood Sample
Collection Information: Patients should be referred to the Genetics Clinic at LHSC, VH (Ext.58140)
Amniotic fluid should be collected in two sterile tubes and shipped STAT to the laboratory - Do not refrigerate, freeze or expose to heat.

System Codes:
CGen Pntl
QFPCR (MD QFPCR)
Microarray (MD Microarray)
Requisition: CYTOGENETICS REQUISITION . (must include patient's name, address, Ontario Health Insurance Number, PIN (if applicable), originating location, Dr's full name and address, test requested, specimen type and pertinent clinical information.

PRENATAL MICROARRAY REQUISITION
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
QF-PCR - 3 Days
Microarray or Chromosome Analysis - 2-3 weeks
Stat
 
 
Reference Range: See final report
Effective Date:  
Revised Date: 2017-11-08
Critical Value: See final report
Interpretive Comments: Prenatal diagnostic test performed at approximately 16-18 weeks gestation.
Special Processing: Must prearrange with Cytogenetics Lab.
Comments: The Cytogenetics Lab is staffed from 0700-1700 (Monday-Friday), Ext. 78974 (office), or 75714 (lab).

For additional information please refer to the Cytogenetics Webpage.
Method of Analysis:  QF-PCR (Rapid Aneuploidy Detection)
Cell culture
Chromosome Karyotyping (depending on QFPCR results)
Prenatal Microarray (depending on clinical indications)
Fluorescence in situ hybridization (FISH) (depending on microarray results)
Critical Information Required: Specimen should be taken with enough time to ensure receipt in the
laboratory by 1500 h
Storage & Shipment: If unable to transport immediately, store at 4oC and transport at room temperature (15-25oC) within 24 hours.
System Codes: 
Cerner
See Collection Information
 
Referred To:  

Questions? Comments? Contact Laura Gopaul