Abstract: Objective To study the clinical value of color Doppler ultrasonography in the early diagnosis of arteriovenous fistula stenosis. Methods Color Doppler ultrasonography was performed in 68 patients clinically considered to have arteriovenous fistula stenosis. We record the peak systolic velocity in the fistula and its upstream artery and calculated the blood flow velocity ratio. Results We found fistula stenosis and the blood flow velocity ratio ≥ 2.5 in 61 cases; the remaining 7 cases were negative, i.e., their blood flow velocity ratio ＜2.5. Conclusion Color Doppler ultrasonoggraphy is an effective method for the early diagnosis of arteriovenous fistula stenosis in clinical practice.

Key words: color Doppler ultrasonography, early diagnosis, arteriovenous fistula