Why is there a lucid interval in epidural hematoma

Neuroimaging should be repeated if there are any signs of clinical deterioration in patients with neuroimaging that is initially normal.The rate of disability among the survivors was 20%.A lucid interval is especially indicative of an epidural hematoma.A report is given on 80 consecutive patients with epidural hematoma.The patient can be conscious and talking and a minute later can be apneic, comatose, and minutes from death.The prognosis is better if there was a lucid interval than if the person was comatose from the time of injury.

The interval they described was longer than usually expected with.In a more comprehensive review of the literature on the surgical treatment of acute subdural hematomas, lucid intervals were noted in up to 38% of cases.They compared this with the 12% incidence of lucid interval in their earlier review of extradural hematomas.