Doppler evaluation of blood flow in therapeutic arteriovenous fistulas.
The flow velocity in 77 patent arteriovenous fistulas was measured with a 5 MHz continuous wave directional Doppler (Parks 906). Ultrasound measurement of the diameter of the brachial artery feeding 56 of the fistulas were at the same time making possible measurements of the flow volume. Comparison between 5 MHz and 10 MHz Doppler demonstrated about 10 per cent lower flow values with the latter equipment. A normal range of flow velocity values (30--70 cm/s) in patent arteriovenous fistulas is suggested.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001166:Arteriovenous Shunt, Surgical; D001783:Blood Flow Velocity; D001916:Brachial Artery / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography