Iida H, Maehira H, Mori H, et al. - Researchers examined the correlation of recorded patterns of temporal changes in activity levels with postoperative complications following hepatectomy. To measure the physical activity levels in 47 patients, they were asked to wear an accelerometer after hepatectomy until postoperative day 7. Categorization of patterns of changes in activity levels was done as follows: upward slope type (n = 88), wherein a gradual increase in activity levels was recorded; bell curve type (n = 13), wherein there was an initial increase in activity levels but subsequently decrease occurred; and flat type (n = 46), wherein no apparent increase in activity levels occurred. Outcomes suggest that in cases with previously increasing activity levels decline during the postoperative period, suspicion for SSI, pleural effusion, and ascites should be raised. In addition, patients with no increase in activity levels at all after surgery are at high risk of SSI and pneumonia.