[Ultrasonic Doppler technic as a method of functional control of extracranial-intracranial anastomosis]

The authors describe the use of the ultrasound Doppler technique for the postoperative control of extra-intracranial bypasses. They arrive at the result that the Doppler sonography, because of an agreement of sonographic and angiographic findings 85 per cent, should be given preference. Moreover, an ultrasonic examination does not involve any inconvenience or risks for the patient.