Test directory: Quadruple Screen

Ordering Code5087
Test NameQuadruple Screen
AliasQuad Screen
MSAFP/HCG Quant/Estriol/Inhibin A
Preferred SpecimenSerum
Preferred ContainerSST (Gold)
Other Specimen/ContainerSerum in Plain (Red)
Optimum Volume3 mL
Collection InstructionsAll pertinent information must be filled in on the
Requisition Form. Specimen must be collected between 15-20 weeks and 6 days gestation.
Transport RequirementsOahu: Refrigerated
Airline: Refrigerated
Specimen StabilityAmbient: 8 Hours
Refrigerated: 2 Days
Frozen: 1 Month
Frozen samples should be thawed only once. DO NOT use frost-free freezers.
Rejection CriteriaGrossly hemolyzed, Insufficient quantity, Specimen older than stability limits, Gross lipemia, Specimen not collected between 15-20 weeks and 6 days gestation
Avail. StatNO
Analytic TimeUp to 3 Days
MethodologyInhibin A: Enzyme Linked Immunosorbent Assay (ELISA)
Refer to individual tests fro HCG, MSAFP, Estriol.

Reference range(s)

The reference ranges listed below are valid on this date of April 25, 2024.
ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Gestational AgeALLWks.See report.
G.A. Based OnALLSee report.
Age At TermALLYrs.See report.
WeightALLlbs.See report.
RaceALLSee report.
GestationALLSee report.
Insulin Dependent DiabeticALLSee report.
Smoking StatusALLSee report.
Repeat testALLSee report.
FH of NTDALLSee report.
FH of Down SyndromeALLSee report.
AFPALLng/mLSee report.
MOMALL<2.5
Beta-HCG, TotalALLIU/mLSee report.
MOMALL0.26-2.49
Unconjugated EstriolALLng/mLSee report.
MOMALL>0.2
Inhibin A, DimericALLpg/mlSee report.
MOMALL<2.0
Down Syndrome Risk AssessmentALLSee report.
Down Syndrome Age RiskALL<1:365
Down Syndrome Screen RiskALL<1:365
NTD Risk AssessmentALLSee report.
NTD Screen RiskALL<1:484
Trisomy 18 AssessmentALLSee report.
Tri18 Screen RiskALL<1:334
InterpretationALLSee report.