Cerebral Circulatory Arrest Detected by Transcranial Color-Coded Duplex Sonography: A Feasible Diagnosis for Intensivists.

Brain death is clinically diagnosed by verification of the absence of brain stem reflexes, motor responses, and the ventilatory drive.1 In some circumstances, ancillary tests are necessary to confirm the diagnosis of brain death, especially when there is uncertainty about the reliability of parts of the neurologic examination or when an apnea test cannot be performed. Ancillary tests are also used to reduce the observation period.1 In clinical practice, electroencephalography (EEG), cerebral angiography, nuclear scanning, transcranial Doppler sonography, computed tomographic angiogra-