Under what condition might exchange transfusion be necessary in neonatal jaundice?

• A. If serum bilirubin elevates to 30 mg/dL
• B. If bilirubin stays elevated at 20-25 despite phototherapy
• C. If jaundice is present at birth
• D. If phototherapy has no side effects

Answer: (B)

Exchange transfusion is a procedure used in the management of severe neonatal jaundice, particularly when the infant's bilirubin levels are dangerously high or not responding adequately to treatment. The correct answer highlights the importance of bilirubin levels failing to decline despite adequate phototherapy.

In scenarios where serum bilirubin levels persist at 20-25 mg/dL despite phototherapy, the risk of complications such as kernicterus increases. Phototherapy is typically the first-line treatment for jaundice, but if it is ineffective and bilirubin levels continue to rise, an exchange transfusion may become necessary to quickly reduce the bilirubin level and prevent neurological damage.

The other options describe conditions that are significant but do not directly indicate the necessity of exchange transfusion. For instance, while a bilirubin level of 30 mg/dL is concerning, not every case at this level warrants an exchange transfusion without considering the clinical context and the infant's overall condition. Similarly, jaundice present at birth may require monitoring but does not automatically dictate the need for exchange transfusion without further evaluations. Lastly, mentioning that phototherapy has no side effects is irrelevant to the decision for exchange transfusion, as it does not provide a rationale related to bilirubin levels or treatment efficacy.