Figure 39-18 Predicted probabilities of postoperative pulmonary complications in different age groups in orthopedic, gynecologic, and major abdominal surgery with a duration of anesthesia of less than 200 minutes. The solid lines represent patients having residual neuromuscular block (TOF < 0.70) following the use of pancuronium; the broken lines represent patients with TOF ≥ 0.70 following the use of pancuronium as well as all patients following the use of atracurium and vecuronium, independent of the TOF ratio at the end of anesthesia.^[99]