Kim YJ, et al. - C linical factors that could forecast acute brain injury (ABI) because of carbon monoxide (CO) poisoning in patients with an altered mental status were investigated. Researchers performed a retrospective analysis of a prospectively collected CO poisoning registry at a single academic medical center. Between January 1, 2013 and December 31, 2015, diffusion-weighted magnetic resonance imaging (DW-MRI) was performed on CO poisoning patients with an altered mental status (defined as unalert on the alert/responsive to voice/responsive to pain/unresponsive scale) at the emergency department. As per findings, ABI could be predicted by determining CO exposure duration. Hence duration of CO exposure may assist clinicians or paramedics identify high-risk patients and provide treatment on priority.