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| 41980:FIRST TRIMESTER PRENATAL SCREEN | |||||||||
| Methodology: | Enzyme-Linked Immunosorbent Assay (ELISA) / Chemiluminescent Immunoassay (CLIA) | ||||||||
| Edit Date: | 4/6/2009 11:23:55 AM | ||||||||
| Components: | Human Chorionic Gonadotropin (hCG) / PAPP-A / Risk for Down Syndrome / Interpretations | ||||||||
| Performed: | Monday-Friday | ||||||||
| Released: | Within 2-3 days of receipt in lab | ||||||||
| CPT Code: | 84163 / 84702 | ||||||||
| Specimen Collection Details | |||||||||
| Collection: | NOTE: Screen can be performed only on individuals with a CRL between 39.0 mm and 80.0mm (10 weeks 5 days – 13 weeks 6 days gestation). NT values provided by a certified sonographer are required. One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube. |
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| Handling: | Allow to clot, centrifuge and separate serum from cells immediately. Refrigerate. Order on an Obstetrics requisition or electronically. The following information is 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. | ||||||||
| Stability: | 4 days refrigerated at 2-8° C, or 30 days frozen at -20° C. Allow not more than one freeze/thaw cycle. | ||||||||
| Standard Volume: | 2 mL serum | ||||||||
| Minimum Volume: | 1 mL serum | ||||||||
| Transport: | Refrigerated, or frozen on dry ice. | ||||||||
| Comments: | Incomplete information will delay patient results. | ||||||||
| Rejection Criteria: | Gross hemolysis or lipemia. | ||||||||