EEG-measurements enable better prediction of the outcome of a coma that was caused by a lack of oxygen to the brain. A new method helps to make reliable and correct estimates in about 50% of patients, instead of only 10% of patients with the methods currently used. This involves continuous EEG-measurements focussing on the speed with which the brain's activity recovers. It seems that recovery over time is a better indicator of the severity of brain damage than single brief measurements, which are currently done.