Evaluation of Neonatal Cholestatis
also see Differential for Cong Hyperbili, Management of Chronic Cholestasis

• Fractionated serum bilirubin
• Liver chemistries: ALT, AST, Alk phos, GGT
• Tests of liver fxn: glucose, albumin, cholesterol, ammonia, and coagulation studies
• CBC
• Bacterial cultures of blood and urine
• Paracentesis if ascites
• Ultrasound of liver and biliary system; MR cholangiography in selected cases
• Serum alpha-1-antitrypsin
• Viral serologies
• Sweat chloride analysis
• Metabolic screen
• Endocrine studies
• Liver biopsy