What does the Kleihauer-Betke test measure?

The Kleihauer-Betke test is specifically designed to measure the presence and quantity of fetal red blood cells that have entered the maternal bloodstream. This test is particularly useful in situations where there is a concern for fetomaternal hemorrhage, which can occur during pregnancy or at the time of delivery. By quantifying the amount of fetal hemoglobin in maternal blood, healthcare providers can assess the severity of hemorrhage, guide clinical management, and determine whether any interventions, such as the administration of Rh immunoglobulin, may be necessary to protect future pregnancies.

This test does not measure maternal blood pressure, fetal heart rate, or the risk of gestational diabetes, as these are evaluated through different methods and tests that serve distinct purposes in monitoring maternal and fetal health. The focus of the Kleihauer-Betke test on detecting fetal red blood cells underscores its critical role in managing pregnancy complications and ensuring maternal-fetal well-being.