Kleihauer-Betke - Quantitative Test for Fetal Bleed

Test description

This test is the next step that would be taken after a positive FMH rapid screen. The purpose of this test is to quantitate how much of a fetal-maternal bleed has occurred, and subsequently additional doses of Rh Immune Globulin (RhIG) will be given to prevent the mother from forming an antibody which may cause problems in future pregnancies. The principle of this test is to differentiate fetal and maternal blood cells based on the type of hemoglobin that is present. The test utilizes a specialized solution that will stain fetal and maternal cells differently.

Kleihauer Betke - Quantitative Test for Fetal Bleed (PDF)

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