Rowley DD, et al. - Researchers undertook this randomized controlled trial to compare incentive spirometry (IS) vs EzPAP lung expansion therapy following upper abdominal surgery in terms of dorsal redistribution of ventilation and incidences of postoperative pulmonary complications, with a priori null hypothesis that there are no differences. Adults who underwent upper abdominal surgery were assigned to receive IS or EzPAP 3 times a day on postoperative days 1–5. They linked an electrical impedance tomography device to the participants for a single lung expansion therapy session on postoperative days 1, 3, and 5 in order to measure the alteration in post-lung expansion therapy dorsal end-expiratory lung impedance (ΔEELI%). Among the adults who received IS or EzPAP 3 times a day following upper abdominal surgery, findings revealed no significant post-lung expansion therapy dorsal ΔEELI% or postoperative pulmonary complications.