Kleihaeur Bethke test is done for:
**Core Concept**
The Kleihauer-Betke test is a laboratory test used to detect the presence of fetal hemoglobin in a maternal blood sample. It is based on the principle that fetal hemoglobin is more resistant to acid elution than adult hemoglobin.
**Why the Correct Answer is Right**
The correct answer is related to the detection of fetal-maternal hemorrhage, which can occur during pregnancy or childbirth. The Kleihauer-Betke test is used to identify fetal red blood cells in the maternal circulation, allowing for the quantification of fetal-maternal hemorrhage. This is crucial for determining the dose of Rh immune globulin needed to prevent isoimmunization in Rh-negative mothers.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not related to the detection of fetal-maternal hemorrhage.
**Option B:** This option is incorrect because it is not a known application of the Kleihauer-Betke test.
**Option C:** This option is incorrect because it is not directly related to the purpose of the Kleihauer-Betke test.
**Clinical Pearl / High-Yield Fact**
The Kleihauer-Betke test is a high-yield fact for obstetrics and is essential for managing Rh-negative pregnant women. It helps in identifying the amount of fetal-maternal hemorrhage, which is critical for preventing isoimmunization.
**Correct Answer:** D. Fetal-maternal hemorrhage