Abstract P56: Relationship Between Neurologically Intact Survival And Time Interval From Collapse To Arrival At Patients Side In Patients With Witnessed Out-of-hospital Cardiac Arrest
Background Survival from out-of-hospital cardiac arrest depends on the emergency medical services (EMS) system. Each community needs to examine and devise its own mechanisms to achieve the goal of optimal patient survival.
Methods Since 2005, the Japanese Government has examined the EMS system of whole victims with out-of-hospital cardiac arrest according to the Utstein style reporting guidelines. In patients with witnessed out-of-hospital cardiac arrest due to cardiac etiology, we devised the time interval between collapse and EMS arrival at patient’s side into five groups (3 min or shorter, 3 to 5 min, 5 to 10 min, 10 to 15 min and longer than 15 min). The primary endpoint was a favorable neurological outcome at 30 days after cardiac arrest.
Results During three years, 172,595(54%) of the 318,141 patients with out-of-hospital cardiac arrest were presumed cardiac cause. Of those, 33%(56,486/172,595) were witnessed by bystanders. The 30-day favorable neurological outcomes among five groups were as follows.
Conclusions It is necessary that EMS system provide resuscitation within at least 10 min of collapse for patients with out-of-hospital cardiac arrest.