What is the first action for a jaundiced baby?

Initiating phototherapy using bili lights is the first action for a jaundiced baby because it effectively lowers bilirubin levels in the blood. Jaundice in newborns often arises from elevated levels of bilirubin due to factors such as hemolysis or immature liver function. Phototherapy works by breaking down bilirubin in the skin, making it easier for the baby's liver to process and excrete the substance.

In addition, this treatment is typically safe and can be applied even to newborns with a positive Coombs test, indicating hemolytic disease. Immediate action is essential in managing jaundice to prevent potential complications such as kernicterus, a serious condition that results from excessively high bilirubin levels.

While other options like administering vitamin K, increasing fluid intake, and monitoring for dehydration are important in general neonatal care, they do not specifically address the urgent need to treat hyperbilirubinemia in a jaundiced infant. These actions may be part of the broader management plan but are not the immediate priority as phototherapy is.