What does the Kleinhauer Bette (KB) serum test detect?

The Kleinhauer-Betke (KB) test is specifically designed to detect fetal red blood cells within the maternal circulation. This test measures the amount of fetal hemoglobin present in a maternal blood sample, which can indicate whether there has been a fetal-maternal hemorrhage. It is particularly useful in various clinical situations, such as assessing the need for Rh immunoglobulin administration in Rh-negative mothers or evaluating cases of trauma in pregnant women.

In situations where fetal red blood cells enter the maternal bloodstream, the implications may be significant, especially regarding the risk of hemolytic disease of the newborn in future pregnancies. By identifying these fetal cells, healthcare providers can better manage care and address potential complications that may arise during the pregnancy or affect future pregnancies. The accuracy of this test plays a vital role in improving maternal and fetal outcomes.