Test Directory
| Test Code | ||
| SNPAF | ||
| Test Name | ||
| SNP Microarray Abbreviated Chromosomes | ||
| CPT Codes | ||
| 81229 | ||
| Expected Turnaround Time | ||
| 10 - 12 days | ||
| Clinical Utility | ||
| The test allows prenatal detection of chromosomal aneuploidy, and is used to rule out tetraploidy and rearrangements not detected by array, such as balanced translocations and inversions. It also helps to clarify array abnormalities to determine if a structural rearrangement, marker, or isochromosome is present. Array can only provide copy number imbalances and cannot determine structure of an abnormality. The SNP assay will detect chromosomal imbalances that could be associated with developmental delay/congenital anomalies. It provides detection of possible uniparental disomy of any chromosome, the percent and location of homozygosity, including the degree of identity by descent. | ||
| Specimen and Container Info | ||
|
Preferred Specimen Type: Amniotic Fluid Preferred Collection Container: Sterile, Non-additive Container Desired Specimen Volume: 25 mL |
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| Collection Instructions | ||
|
Collect amniotic fluid in conical tube via amniocenteses procedure. |
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| Processing and Submission Instructions | ||
| Transport Instructions | ||
|
Transport to the laboratory refrigerated. |
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| Stability Requirements | ||
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| Causes for Rejection | ||
| Quantity not sufficient for analysis (<12 mL of amniotic fluid or DNA quantity <20 ng/μL); bloody sample; gestational age <17 weeks | ||
| Methodology | ||
| Snp Microarray Analysis Is Performed Using The Cytoscan Hd-Platform | ||
| Reference Intervals | ||
|
See patient report. |
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| Reference Lab | ||
| Integrated Genetics | ||
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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