Besarab A, Ross R, Effendi A, Frinak S
The relation of recirculation to access flow
Am Soc Nephrol
J Am Soc Nephrol (abstract)
(Nov) 6:482 1995
This study correlated access flow measured by brachial artery
Doppler with recirculation by the urea technique. In 63 patients
brachial artery flow was > 450 ml/min, and these had no
recirculation (mean 0.5%). In 14 patients, brachial artery flow
was < 450 ml/min, and recirc increased progressively as brachial
artery flow decreased (r=0.79). Recirc seemed to occur when BA
flow was 60 ml higher than blood pump flow. 60 ml/min is
approximately equal to the nutrient flow in the arm.
Comment: This data suggests that a severe
reduction in access flow need to be present for recirculation to
occur (assuming needles are not placed too close and are not
reversed).
(Daugirdas)
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Am Soc Nephrol
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Vascular Access: graft/fistula