One-minute dynamic cerebral autoregulation in severe head injury patients and its comparison with static autoregulation. A transcranial Doppler study.

Objective: To compare dynamic and static responses of cerebral blood flow to sudden or slow changes in arterial pressure in severe traumatic brain injury (TBI) patients.

Design: Prospective study.

Patients And Methods: We studied 12 severe TBI patients, age 16-63 years, and median GCS 6.