Severity Factors and Needed Observation Time at ED of Patients Wih Head Injury

We know precisely which patients and when they should have an imaging test to evaluate a Head Injury (HI). But in those patients on anticoagulant and / or antiaggregant treatment we do not know the exact incidence of early and late hemorrhagic lesions, and there is no specific recommendation on how long they should remain under observation in the emergency department if no initial lesions are evident. Our goal is to try to answer these two questions.