What is a common diagnostic test for Rh disease?

The Kleihauer-Betke Test is a well-established diagnostic test for Rh disease, particularly in pregnant women. This test is used to determine the extent of fetal-maternal hemorrhage by measuring the amount of fetal hemoglobin present in maternal blood. In cases where Rh incompatibility is suspected, understanding any fetal red blood cells that have crossed into the maternal circulation is crucial for assessing the risk for hemolytic disease of the newborn.

In the context of Rh disease, the presence of fetal blood in maternal circulation indicates that Rh-positive fetal red blood cells may stimulate an immune response in an Rh-negative mother, leading to the production of antibodies against these cells. Monitoring and quantifying this hemorrhage helps in managing the pregnancy and ensuring appropriate interventions, such as administering Rh immunoglobulin if necessary.

The other diagnostic tests listed do not specifically target the detection or assessment of Rh disease. Ultrasound Imaging is primarily used for visualizing fetal development and monitoring pregnancy rather than directly diagnosing Rh disease. Blood Cultures are conducted to diagnose infections rather than blood group incompatibilities. An Electrolyte Panel evaluates the patient's metabolic status and monitors conditions like dehydration or renal function, which are not specific to Rh disease.