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A member asked:
During dialysis why does the subclavian catheter have darker blood than in patients with a fistula?
5 doctors weighed in across 2 answers
Venous blood: A subclavian catheter has only venous, deoxygenated blood returning from the body. A fistula contains oxygenated arterial blood coming from the heart. This is the reason for the bright red blood seen in fistulas.
Answered 9/29/2019
5.8k views
Fistula vs catheter: Dialysis catheters are placed in veins, and therefore use deoxygenated (dark) blood. Dialysis fistula is a connection between an artery and a vein. The blood within a fistula is oxygenated, and therefore more red.
Answered 6/24/2013
5k views
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