[Value of Doppler and duplex sonography studies of the extracranial carotid system performed by technical assistants].

The results of Doppler sonographic and Duplex sonographic examinations of the extracranial carotid artery carried out in 100 patients by two sonographers were compared with angiographic findings. The accuracy and quality of the ultrasonic examinations did not differ from those of documented examinations performed by physicians. The percentage of error due to mistakes on the part of sonographer vas 1.3%. We conclude that sonographers are qualified for performing carotid Doppler and duplex sonography, provided that they are well-trained, experienced and supervised.