Baby ‘O’ positive, blood group, mother Rh negative, cord bilirubin 7 mg%, conjugated 1 now treatment is –
**Core Concept**
The scenario describes a newborn with an Rh-positive blood group, born to an Rh-negative mother. This situation necessitates the administration of Rh immunoglobulin (RhIg) to prevent the formation of anti-Rh antibodies in the mother, which could lead to hemolytic disease of the newborn (HDN) in subsequent pregnancies.
**Why the Correct Answer is Right**
The administration of RhIg to the mother within 72 hours of delivery is crucial to prevent sensitization. RhIg works by binding to and neutralizing any fetal Rh-positive red blood cells that may have entered the maternal circulation during delivery, thereby preventing the activation of the maternal immune system and the production of anti-Rh antibodies. This is especially important in the case of a cord bilirubin level of 7 mg%, which indicates some degree of hemolysis.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because RhIg is specifically indicated in situations where there is a risk of Rh sensitization, such as in Rh-negative mothers carrying Rh-positive fetuses. In this case, the mother is Rh-negative, and the baby is Rh-positive, making RhIg administration necessary.
**Option B:** This option is incorrect because the administration of RhIg is not dependent on the level of bilirubin. While a high bilirubin level may indicate hemolysis, the decision to administer RhIg is based on the mother's Rh status and the baby's blood group, not the level of bilirubin.
**Option C:** This option is incorrect because the administration of RhIg is not a treatment for hemolysis. While it may help prevent sensitization, it does not directly affect the level of bilirubin.
**Clinical Pearl / High-Yield Fact**
RhIg should be administered within 72 hours of delivery to prevent sensitization, and it is essential to repeat the dose in subsequent pregnancies if the mother is still Rh-negative and the baby is Rh-positive. This can help prevent the formation of anti-Rh antibodies and reduce the risk of HDN.
**Correct Answer:** D. Rh immunoglobulin