Transcranial Doppler and Transcranial Color-Coded Duplex Sonography

Transcranial Doppler (TCD) is a safe, noninvasive, bed-side technique for the measurement of cerebral arteries blood flow velocity, and it is commonly used in standard care of neurocritical care patients. TCD-derived indices, including flow velocities and pulsatility index, allow to assess cerebrovascular dynamics and to calculate secondary indices including noninvasive intracranial pressure, cerebral perfusion pressure, vasospasm, and cerebral autoregulation, which can facilitate clinical management of cerebral pathologies.