Brain Oxygenation During Cardiopulmonary Resuscitation

The study is aimed to assess (a) the incidence of hyperoxia at the point of return of spontaneous circulation (ROSC) and (b) the role of arterial blood oxygen partial pressure to brain oxygenation during out-of-hospital cardiac arrest. 80 adult patients will be recruited in a physician staffed helicopter emergency medical services. Brain regional oxygen saturation and invasive blood pressure are monitored until hospital admission and arterial blood gases are analyzed immediately when the unit arrives to the patient and again at the time of ROSC.