A full-term neonate shows signs of respiratory distress after delivery by cesarean section. The baby is placed on nasal CPAP at 4 cm H2O with an FIO2 of 0.6. The ABG results on these settings are: pH = 7.32, PaCO2 = 45 mm Hg, PaO2 = 48 mm Hg, SaO2 = 70%, HCO3– = 22 mEq/L. The respiratory therapist should recommend which of the following?
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After increasing the level of CPAP delivered to an infant, the therapist notices that the neonate’s PaCO2 rises and the PaO2 falls. What may have caused this situation?