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Test Name:
Fetal-Maternal Bleed, Qualitative, with Quantitation if Indicated
- SBMF No:
22041 - Performance Lab Name:
Blood Bank Services - Test Mnemonic:
FETAL SCRN - ABN:
Not required - CPT Code:
85461 - LOINC Code:
1034-8 - Also Known As:
Screen for Fetal-Maternal Bleed
Kleihauer-Betke alternate - Also See:
36040 Fetal-Maternal Bleed, Quantitation, by Flow Cytometry - Spec Type:
Whole blood - Spec Container:
Lavender top (EDTA) tube - Pref Vol:
7.0 mL - Min Vol:
1.0 mL - Fasting:
No - Spec Collect:
Routine venipuncture - Spec Process:
Do not centrifuge
Do not remove plasma from cells - Spec Store Transport:
Refrigerated - Spec Stability:
48 hours refrigerated (2-8°C) - Methodology:
Antigen-Antibody Reaction
Qualitative Bleed Screen (agglutination) - Use:
Used to determine the presence of (D) positive fetal cells in the maternal circulation - Clinical Significance:
Every Rh-negative (weak D negative) mother who delivers or aborts a fetus after twelve weeks gestation must have a qualitative fetal-maternal bleed screen test by agglutination performed to determine the presence of (D) positive fetal cells in the maternal circulation.
NOTE: If the newborn types Rh-positive (weak D), a quantitative fetal-maternal bleed test must be performed.
- Reference Range:
Negative
Note:
Rh Immune Globulin Dosing:
If the qualitative fetal-maternal bleed screen test is negative, one (1) vial of Rh immune globulin is the suggested dose to be administered to the mother.
If the qualitative fetal-maternal bleed screen test is positive, a quantitative fetal-maternal bleed test will be performed and Rh immune globulin dosing will be calculated based upon the quantitative test results. - Additional Test Info:
Fetal-Maternal Bleed, Quantitation, by Flow Cytometry (SBMF #36040) is added and reported separately when indicated. Additional charges may apply. - Day Run:
Sat-Sun (daily) - Time Reported:
If ordered stat, within 4 hours of receipt in lab - Test Type:
OBSTETRIC-NEONATAL
