In Rh lso Immunisation, exchange transfusion is indicated if –

Indications of Exchange transfusion Cord hemoglobin      _.10g/dL           o Bilirubin protein ratio >3.5        o Prematurity Cord bilirubin          >5mg/d             o Reticulocyte count > 15% Previous kernicterus or severe erythroblastosis in a sibling