A young patient is brought into the emergency department having suffered a traumatic brain injury. Hypothermia may be considered as part of the treatment regimen. If so, how soon after the injury should treatment begin, and how long should treatment last? Dr. Jamie Hutchison, associate professor of critical care medicine and pediatrics at the University of Toronto, and research director of critical care medicine at the Hospital for Sick Children in Toronto, explains the mechanism used for cooling and examines potential links between data on hypothermia treatment for adults and similar therapy for children. Dr. Mark Nolan Hill hosts.