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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
FISH, Prenatal Screen, Amniotic Fluid
Test Code10393
CPT Codes
88271 (x5), 88274 (x2)<br>Limited Access Code
Preferred Specimen
20 mL amniotic fluid collected in a sterile, screw-cap container
Minimum Volume
5 mL
Instructions
Clinical history/reason for referral is required with test order.
Ship at room temperature. Specimen viability decreases during transit. Send specimen to testing lab for viability determination. DO NOT FREEZE. DO NOT REJECT.
Ship at room temperature. Specimen viability decreases during transit. Send specimen to testing lab for viability determination. DO NOT FREEZE. DO NOT REJECT.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: Preferred
Refrigerated: Acceptable
Frozen: Unacceptable
Refrigerated: Acceptable
Frozen: Unacceptable
Methodology
Fluorescence In Situ Hybridization
Setup Schedule
Set up: Daily; Report available: 24-48 hours from receipt of sample in laboratory
Reference Range
Interpretive report
Clinical Significance
This fluorescence in situ hybridization (FISH) prenatal screening test is used for numerical abnormalities of chromosomes X, Y, 13, 18, and 21 in amniotic fluid and chorionic villus samples. This test will not detect chromosomal rearrangements or numerical abnormalities that do not include the above chromosomes or regions of hybridization on the above chromosomes. Since this is a screening test, the results MUST be evaluated in conjunction with a standard chromosome study or a chromosomal microarray (CMA) study. Medical decisions should not be based solely on FISH screen results. The American College of Medical Genetics recommends that irreversible therapeutic action should not be taken based on the results of FISH analysis alone (Am. J. Hum. Genet. 53:526-527, 1993).