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To reduce infection risks in patients on hemodialysis with a long term central venous catheter, different types of closed luer lock access devices are used on the arterial and venous catheter hub. Although those connectors create a mechanically and microbiologically closed system in between two dialysis sessions, no data are available on the resistance those connectors exert on the blood flow during dialysis. Therefore, in the present study, flow resistance was determined in three different connectors.

How much is catheter flow influenced by the use of closed luer lock access devices?