Serum Integrated 2
Also known as: AFP, Maternal Serum, Down Syndrome
Use
Screening test for open neural tube defects, Down syndrome, and trisomy 18
Special Instructions
Not provided.
Limitations
This is a screening test requiring two specimens collected in different trimesters. A positive screening result indicates that diagnostic testing may be advised to determine the presence of a neural tube defect or chromosomal abnormality. The test's performance characteristics have not been cleared or approved by the FDA, implying potential limitations in regulatory acceptance for clinical diagnostics.
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 49586-1 - Integrated scn Patient-Imp
- 18185-9 - GA
- 29463-7 - Weight
- 48407-1 - PAPP-A SerPl-mCnc
- 76348-2 - PAPP-A adj MoM SerPl
- 1834-1 - AFP SerPl-mCnc
- 23811-3 - AFP adj MoM SerPl
- 19080-1 - HCG SerPl-aCnc
- 32166-1 - HCG adj MoM SerPl
- 2250-9 - u Estriol SerPl-mCnc
- 21264-7 - u Estriol adj MoM SerPl
- 23883-2 - Inhibin A SerPl-mCnc
- 36904-1 - Inhibin A adj MoM SerPl
- 48803-1 - Neural tube defect risk Fetus
- 43995-0 - Ts 21 risk Fetus
- 49090-4 - Fet Ts 21 risk from Mat age
- 43994-3 - Ts 18 risk Fetus
- 47223-3 - Fet Ts 18 risk from Mat age
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
5 mL
Minimum Volume
3 mL
Container
Gel-barrier tube
Collection Instructions
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.
Patient Preparation
Maternal serum specimens must be drawn prior to amniocentesis to avoid contamination with fetal blood.
Storage Instructions
Room temperature
Causes for Rejection
Gross hemolysis; gross lipemia; quantity not sufficient for analysis; improper specimen type
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
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