Definition of "postoperatively"

General anesthesia may decrease the functional residual capacity (FRC) for up to 1 to 2 weeks postoperatively.

2011, Pauline K. Park, “Assessment of Noncardiac Perioperative Risk”, in Michael W. Mulholland, Gerard M. Doherty, editors, Complications in Surgery, 2nd edition, Philadelphia: Lippincott Williams & Wilkins, page 83