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Vanderbilt Pathology Laboratory Services

Test Directory



PRENATAL TRIPLESCREEN MATERNAL SERUM (PNS)

Department: Esoteric Chemistry
Test Synonym(s): AFP, PNS, Prenatal Triscreen Blood
Test Components: MAF, HCG, uE3
CPT Codes: 82105, 84702, 82677
Methodology: Chemiluminescent Immunoassay
Reference Range: Pathologist interpretation of risk for Down Syndrome and an open neural tube defect
Tube Type: Red top SST (Clot activator with gel) or red top (no gel)
Specimen: Serum
Volume: 5 mL
Minimum Volume: 1 mL
Temperature: Refrigerate
Stability: Refrigerated: 1 week
Reasons for Rejection: Incomplete maternal/fetal information
Days Performed: Monday - Friday
Times Performed: 8:00 a.m. - 2:00 p.m.
TAT: 1 day
Special Instructions: Samples collected from patients between 15 weeks, 0 days and 21 weeks, 6 days gestation will be accepted for this screening test. uE3 cannot be ordered by itself. Completed Maternal / fetal information sheet is required.
Click here to print the Fetal Risk Information Sheet.

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