CHALICE Kuralı

Antegrade or retrograde

Abnormal = in excess of drowsiness expected by the examining doctor

1 vomit = single discrete episode of vomiting

Any suspicion of NAI by the examining doctor

Blood or CSF from ear or nose, panda eyes, Battle's sign, hemotympanum, facial crepitus, or serious facial injury

Any focal neurologic sign (motor, sensory, coordination, or reflex abnormality)

High-speed: >40 mph (64 km/h)