QUAD SCREEN (SECOND TRIMESTER) MATERNAL
Test Code: LAB9095
CPT Code: 81511 001 82105 001 82677 001 84702 001 86336 001
Interface Code
QUADSC
Synonym
α-Fetoprotein (AFP) Tetra Profile
017319
017319
Specimen Type
Serum
Specimen Container
Gel-barrier tube, no thrombin additive
Specimen Handling
Collect in serum separator tube with gel barrier. Allow blood to clot, avoiding hemolysis. Separate serum from cells by centrifugation. Transport spun tube to testing laboratory. Pour off is not advised.
Volume
5 mL
Minimum Volume
3 mL
Temperature
Room temperature
Unacceptable Conditions
Gross hemolysis; gross lipemia; quantity not sufficient for analysis; improper specimen type
Methodology
Chemiluminescent immunoassay
Schedule
Lab Corp pick-up daily M-F Until 8pm, Sat-Sun Until 4pm
Additional Information
The following information must be provided: gestational age, date on which the patient was the stated gestational age, how gestational age was determined (LMP, EDD, US), patient's weight, patient's date of birth, patient's race (white, black, other), and insulin-dependent diabetic status. Also indicate relevant patient history (eg, prior neural tube defects, Down syndrome, ultrasound anomalies, or previous maternal serum screening specimen during this pregnancy). Complete information is necessary to interpret the test. Patient information may be provided to the laboratory using the Maternal Prenatal Screening requisition form 0900. Specimens must be collected before amniocentesis. Down syndrome screening is offered for gestational ages 15.0 to 21.9 weeks. Open spina bifida screening is offered for gestational ages 15.0 to 23.9 weeks. The optimal gestational age for open spina bifida screening is 16.0 to 18.9 weeks.
Stability
Room Temperature: 7 days; Refrigerated: 14 days Frozen: 14 days
Reference Range Information
Reference values are dependant upon methodology/instrumentation, check final report for current reference values
Turn Around Time
5-7 days upon receipt
Performing Site
LabCorp Laboratory
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