<prompt> Better prognostic factor for operation of biliary duct obstruction in newborn areNo passage of bileSize of ductile 200 micronWeight of baby 3 kgAge of 8 weeks  <response>: Major factors in successful outcome after pooentreostomy Age in days at diagnosis and initial surgery 30-60 days Length of time jaundice was present before surgery Successful and persistent bile flow postoperatively Size and nature of the microscopic ducts 150um Degree and extent of fibrotic changes in the liver Need for phototherapy as a neonate Technical aspects of the postenterostomy and anastomosis Presence of bile on hepatic lobular zone 1 Ref: Blumga 5th edition Pgno :600 