[Cerebral Blood flow velocity spectrum by transcranial doppler ultrasound in patients with brain death clinical criteria].

Objective: To evaluate cerebral blood flow (CBF) direction, speed, and shape of Doppler profile in patients with clinical criteria of brain death (BD).

Patients: A total of 42 consecutive patients with clinical criteria for BD were included.

Measurements And Interventions: After anemia, hypothermia and hypocapnia were ruled out; confirmatory electroencephalogram (EEG) and a complete transcranial Doppler ultrasonography (TCDU) profile of circle of Willis and basilar arteries were done in all patients.