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A member asked:
For a dialysis, why is the subclavian catheter has darker blood rather than in patient with fistula?
A doctor has provided 1 answer
Catheter vs fistula: An a-v fistula (avf) is a connection between an artery and a vein, that's why its called an a, for artery, v, for vein, fistula. Arterial blood has more oxygen, making it redder, than venous blood. A subclavian catheter has both blood tubes in the vein, where there is less oxygenated blood, as it does not have any arterial inflow. That's why it has darker blood than an avf.
Answered 11/28/2014
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