تكرارپذيري نتايج داپلرترانس كرانيال در اندازه گيري سرعت جريان خون شرايين اصلي مغز

REPEATABILITY OF TRANSCRANIAL DOPPLER RESULTS IN MEASUREMENT OF MAJOR CEREBRAL ARTERIES VELOCITIES

Background & Aim: TransCranial Doppler (TCD) is a technique that measures blood flow velocity of main intracranial arteries based on Doppler principle and sonography. Regarding to role of practice in sonographic techniques such as TCD and implementation of this method in Razi and Imam medical centers of Tabriz University of Medical Sciences since 1999, we decided to study repeatability of the TCD measurements. Materials and Methods: We included 20 admitted patients to Razi medical center in neurology ward, in all of them mean flow velocities of 11 main intracranial arteries including: middle, anterior, and posterior cerebral arteries, carotid siphons, vertebral arteries of both sides and basilar artery were detected by the first examiner. Then within 0-3 days another examiner using same instrument studied the same patients. Finally, recorded data were compared with each other and analyzed with repeated measure statistical method. Results: Differences of mean flow velocities measurements in all of the above mentioned arteries were not significant and Korenbakh alpha of 0.8167 was found which revealed high repeatability and corresponded with published information. Discussion: Experienced examiners can use transcranial Doppler study without significant differences in the measurements.