First Trimester Screen Only - Iowa Maternal Screening
Label Mnemonic: FTRIIMS
Epic Lab Code: LAB8342
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Serum
Specimen Instructions:
Collect during first trimester when the ultrasound crown rump length (CRL) is 32-80 mm at 10 weeks-13 weeks 6 days. Nuchal translucency (NT) measurement is REQUIRED and must be performed when the CRL is 32-80 mm. Patient weight (kg), ultrasound date, CRL (mm) and NT measurement (mm) at time of ultrasound and sonographer name required. If IVF pregnancy, the age of the egg donor is required. Refrigerate specimen if not transported within 24 hours of collection to reference laboratory.
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
3 mL whole blood in Red Top Tube or 1 mL serum
Rejection Criteria:
Plasma or specimen older than 9 days. Sample not collected within the required gestational age range.
Delivery Instructions:
Deliver to laboratory after collection.
Turn Around Time:
3-5 days upon receipt at rerence laboratory
Reference Range:
By report - PAPP-A, hCG, and NT measurement calculated Multiples of the Median (MoMs) based on gestational age.
Comments:
First trimester screening test for DS and T18. Testing does not include AFP for open NTD screening.

This test cannot be performed on multiples.

If this test is performed, recommended that a NTD Screen - Iowa Maternal Screening (LAB8341) be performed in the second trimester.
Methodology:
Quantitative Chemiluminescent Immunoassay
CPT Code:
84702, 84163