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AFP QUAD SCREEN

Test Number:
  • 2928
Test Alias:
Preferred Specimen:
  • SERUM
Container Type:
  • SST
Alternative Specimen:
Volume:
  • 3 ML
Collection Instructions:
  • The Quad Screen in pregnant women should be performed between 15.0 and 22.9 weeks gestational age, although the optimal period is 15.0-16.9 weeks. This time frame allows sufficient opportunity for further diagnostic studies if the initial Quad Screen results are abnormal. Specimens submitted before 15.0 weeks or after 22.9 weeks gestation cannot be properly evaluated for open neural tube defects, Down syndrome or trisomy 18. Because Quad Screen results are influenced by certain patient characteristics, the following data must be provided with the specimen in order to permit accurate interpretation of results: date of collection, patient’s (maternal) date of birth, patient’s estimated date of delivery (EDD), patient’s weight (in lbs.), patient’s race, patient’s diabetic status (is patient-insulin dependent prior to pregnancy), number of fetuses, and whether this is a repeat sample.
Transport Temperature:
  • REFRIDGERATED
Specimen Stability:
  • Room temperature: 7 days
  • Refrigerated: 7 days
  • Frozen: 28 days
Methodology:
  • Immunoassay (IA)
CPT Code:
  • 82105
  • 82677
  • 84702
  • 86336
Reject Criteria:
  • Gross hemolysis • Gross lipemia
Reference Range:
Report Available:
  • 3 DAYS

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