A patient is receiving IPPB therapy with a PIP of 22 cm H2O following abdominal surgery. He has a VC of 2.2 L. The respiratory therapist should recommend which of the following?
A. Decrease the PIP to 18 cm H2O.
B. Discontinue IPPB and begin deep breathing and coughing exercises.
C. Continue IPPB as ordered.
D. Obtain an arterial blood gas.