[Answered]: A one week old female infant with trisomy 21…

A one week old female infant with trisomy 21 presents to the emergency department with persistent non-bilious vomiting and abdominal distention. Her parents report decreased wet diapers and no stools in over 24 hours. The baby is lethargic and slightly jaundiced. No masses are palpated on physical examination of the baby’s abdomen. Abdominal x-ray shows a classic “double-bubble” sign associated with duodenal obstruction. Heart and lung sounds are normal. Chest x-ray shows clear lung fields and a normal cardiac silhouette. Vitals signs include: HR 188, BP 75/40, RR 30, SpO2 100% while breathing room air The baby’s serum chemistry panel shows the following; BUN 29 mg/dL CO2 (Carbon Dioxide) ? Creatinine 1.3 mg/dL Glucose 75 mg/dL Serum Chloride 78 mmol/L Serum Potassium 3 mEq/L Serum Sodium 136 mEq/L Serum Calcium 9 mg/dL ALT 50 Units/L AST 40 Units/L Alkaline Phosphatase 45 Units/L GGT 10 Units/L Albumin 3.5 g/dl Bilirubin 7 mg/dL RBC 5 x 10(12)/L Hemoglobin 14 g/dL Hematocrit 45 % MCV 89 fL RDW 12 % WBC 9 x 10(9)/L Platelets 299 x 10(9)/L Which of the following are true regarding the baby’s condition? The baby likely has an abnormal gene for the fibrocystin protein The baby is has renal tubular dysfunction The baby likely has a paucity of bile ducts The baby’s CO2 will be high The baby has prerenal azotemia The baby’s CO2 will be low The baby is losing H+ and CL- from loss of gastric fluid