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Unit Code 81149:
Quad Screen (Second Trimester) Maternal, Serum

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Specimen Required

Draw blood in a plain, red-top tube(s) or a serum gel tube(s).

Spin down immediately and send 1 mL of maternal serum

refrigerated.

Note:    1. The following information is required for processing:

                       A.   Maternal date of birth (not age), weight, race, and

                              number of fetuses

                              Note:  Clinical interpretation is not possible if 3 or more

                                            fetuses are present or in twin pregnancies with a

                                            insulin-dependent diabetic mother.

                       B.   Is patient an insulin-dependent diabetic?

                       C.   Gestational age calculation (provide at least 1 of the following):

                              1.  Date of ultrasound and gestation by ultrasound on the

                                    date ultrasound was performed

                                    Note:    Do not extrapolate to draw date.

                                                   Twin pregnancies must have ultrasound

                                                    information included.

                              2.  First day of last menstrual period (LMP)

                              3.  Gestation by physical exam

                              4.  Expected date of delivery, must specify by LMP

                                    or ultrasound.

                       D.   In vitro fertilization pregnancy-please provide donor

                              date of birth as this may have a significant impact on

                              calculated screen risk.

             2. Gestational age must be between 15 and 22 weeks for neural

                       tube interpretation; 16 to 18 weeks is optimal. Down syndrome and

                       trisomy 18 risk interpretation is provided for specimens that are

                       between 14 and 22 weeks gestational age.

3.  Please complete and submit a "Second Trimester Maternal Screening

      Alpha-Fetoprotein (AFP)/Quad Screen Patient Information

       Sheet" (Supply T595) in Special Instructions. Forward it with the

       specimen, or send the information electronically.

                  4. If this is a repeat analysis, please note previous laboratory

                      control number.

  5.  Patient education brochures in English (Supply T522) and

      Spanish (Supply T534) are available upon request.

Transport Temperature

Refrig\Frozen OK\Ambient NO

Reject Due To

Specimens Other Than:                 Serum     

Anticoagulants Other Than:           N/A

Hemolysis:                                          Red Reject; Pink OK                                             

Thawing:                                              Warm < or = 7 days; Cold OK                       

Lipemia:                                               No                                               

Day(s) and Time(s) Test Performed

Monday through Friday; 5 a.m.-5 p.m., Saturday; 6 a.m.-1 p.m.

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