Effect of the Mobile Self-input Tool of Incentive Spirometer (RCT)

This study evaluates the effectiveness of the mobile self-input tool providing alarm and visual motivation, how much more it can encourage practicing of incentive spirometer undergoing post-operative patients under general anesthesia. Half of participants will receive the mobile self-input tool providing alarm, and their practicing rate will be sent to Nurse's Dashboard. While the other half will receive the mobile self-input tool, but it won't contain alarm function and their practicing rate won't be sent to Nurse's Dashboard, either.