Human Chorionic Gonadotropin (hCG) / PAPP-A / Risk for Down Syndrome / Interpretations
Performed:
Monday-Friday
Released:
Within 48 hours of receipt. Integrated results released within 2-3 days of receipt of 2nd trimester specimen.
CPT Code:
84163 / 84702
Specimen Collection Details
Collection:
NOTE: These requirements are for the first trimester draw for the Sequential Integrated Prenatal Screen and can be performed only on individuals with a CRL between 39.0 mm and 80.0 mm (10 weeks, 5 days-13 weeks, 6 days gestation). NT values provided by a certified sonographer are required. Requires a second specimen to be submitted between 15 weeks, 0 days and 21 weeks, 6 days gestation, Sequential Integrated Screen, 2nd Trimester (41968). Order on a PeaceHealth Laboratories Obstetrics requisition or electronically, and include the following information, required for test interpretation: patient’s date of birth, current weight, due date, dating method (US, LMP), number of fetuses, patient’s race, if patient requires insulin, if a previous child has neural tube defects or Down syndrome and, for in vitro fertilization pregnancies, the age of the egg donor. Also indicate if patient is a smoker (this alters one biomarker and requires a correction). Collect one 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube.
Handling:
Allow to clot, centrifuge and separate serum from cells immediately. Refrigerate.
Stability:
4 days refrigerated at 2-8° C, or 30 days at -20° C. Allow no more than one freeze/thaw cycle.
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