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Test Code BLOD1439 Parental Sample Prep for Prenatal Microarray Testing

Additional Codes

Mayo Test Code: PPAP

Useful For

Preparing parental blood samples for possible confirmation testing if an abnormality is detected on the prenatal array sample

 

DNA extraction of the maternal blood sample used for maternal cell contamination testing

Testing Algorithm

This test can only be ordered on the parents when a prenatal microarray test has been ordered on the fetal sample.

 

This test code contains no charge and serves as a way to correlate proband and parental specimens. If additional testing is warranted, the appropriate tests will be added. 

 

When prenatal microarray analysis is ordered, parental blood samples are collected and prepared for confirmation studies should an abnormality be detected on the prenatal sample. If an abnormality is detected on the fetal sample, the most appropriate testing (microarray, FISH, or chromosome analysis) to aid in the interpretation of the prenatal result is performed on the parental samples. A paternal blood sample is desired but not required.

 

Maternal cell contamination testing will be performed on the maternal blood and prenatal samples to rule out the presence of maternal cells in the fetal sample.

Method Name

DNA Extraction/Cell Culture

Specimen Type

Whole blood


Necessary Information


1. The reason for referral is required.

2. Include the name listed on the prenatal sample that was submitted for prenatal microarray analysis.



Specimen Required


This test requires 2 blood specimens: 1 sodium heparin and 1 EDTA.

 

Specimen Type: Whole blood
Container/Tube: Green top (sodium heparin) and lavender top (EDTA)
Specimen Volume: 

EDTA: 3 mL

Sodium heparin: 4 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send specimens in original tubes.


Specimen Stability Information

Specimen Type Temperature Time
Whole blood Ambient (preferred)
  Refrigerated 

Reject Due To

No specimen should be rejected.

Reference Values

An interpretive report will be provided.

Day(s) and Time(s) Performed

Samples processed Monday through Sunday. Results reported Monday through Friday, 8 a.m. to 5 p.m.

Performing Laboratory

Mayo Medical Laboratories in Rochester

CPT Code Information

This test code contains no charge and serves as a way to correlate proband parental specimens. If additional testing is warranted, the appropriate tests will be added.