A term infant is recovering from a laparoscopic inguinal her…

A term infant is recovering from a laparoscopic inguinal hernia repair.  He remains intubated and received a dose of IV Tylenol in the recovery room.  He remains sleepy with shallow breathing.  His post-op CBG is reported as pH 7.45, pCO2 28, HCO3 38 and base excess of +3.  A normal pulmonary response to metabolic alkalosis is: