Avoiding Pulmonary Complications after Major Abdominal Surgery Using Novel Digital Incentive Spirometry Technology

To determine the efficacy of preoperative incentive spirometry to improve forced expiratory volume (FEV1) to remove postoperative pulmonary complications.
To determine the efficacy of incentive spirometry to improve forced vital capacity (FVC) and blood oxygen saturation in the preoperative setting, and FEV1, FVC, and blood oxygen saturation in the postoperative setting.