- Having the following signs or symptoms: 1)present with fever (rectal temperature >100.5 ºF or tympanic temperature >101.5ºF); 2) present with known pulmonary (lung) and/or cardiac (heart) congenital malformations; 3) have an underlying chronic disease (respiratory (Chronic pulmonary disease includes congenital anomalies, bronchopulmonary dysplasia, and cystic fibrosis), cardiac, renal, or liver insufficiency, immunodeficiency, encephalopathy); 4) known or suspected foreign body aspiration; 5) their Modified Tal Asthma Symptoms Score is 10; 6) their weight is below a certain limit for the average for their age; 8) they were born before 34 weeks' gestation. 9) Laboratory tests for serum potassium and blood glucose within the following limits (potassium between 3.0-5.8 mEq/L and glucose between 45-140mg/dL).