A premature infant is receiving oxygen by nasal cannula at 1…

A premature infant is receiving oxygen by nasal cannula at 1.5 L/min.  The following capillary blood gas and pulse oximetry values are obtained:  pH: 7.37  PtCO2: 41 mm Hg  PCO2: 43 mm Hg HCO3: 23 mEq/L  BE: -1 mEq/L  SpO2: 98%  Which of the following should be recommended?  

The physician in the emergency department is attending to a…

The physician in the emergency department is attending to a 12-year-old child who has an exacerbation of asthma. The physician asks the therapist to recommend a medication that has a synergistic effect with beta-2 agonists during asthma exacerbations. Which of the following medications should the therapist recommend?