A 80-kg male patient is currently being ventilated in PRVC m…

A 80-kg male patient is currently being ventilated in PRVC mode on the following settings: Vt 550, RR 20, PEEP 5, and FIO2 of 40%.  The following ABG is obtained: 7.39/42/84/25/96%.  The following waveform is observed: What is the most appropriate initial action?