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Test ID: QUAD
Quad Screen (Second Trimester) Maternal, Serum

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Secondary ID A test code used for billing and in test definitions created prior to November 2011

81149

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

NEURAL TUBE DEFECTS

An AFP multiple of the median (MoM) <2.5 is reported as screen negative. AFP MoMs > or =2.5 (singleton and twin pregnancies) are reported as screen positive. 

 

DOWN SYNDROME

Calculated screen risks <1/270 are reported as screen negative, risks > or =1/270 are reported as screen positive.

 

TRISOMY 18

Calculated screen risks <1/100 are reported as screen negative, risks > or =1/100 are reported as screen positive.

 

An interpretive report will be provided.



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