Q; How the choice of temporary dialysis catheter may influence issues with clotting during Continuous Renal Replacement Therapy (CRRT)?


Answer: Depending on manufacturer, temporary dialysis catheter may have either side or end holes. Catheters with end holes are preferable as flow will be laminar, which is optimal and preferred. As expected, flow through the side holes are usually turbulent and down the line may cause stagnation. Also, during CRRT side holes have suctioning against the vessel walls, which may further contribute to the blocking and impairment of flow.


Reference:

Jean G, Chazot C, Vanel T, Charra B, Terrat JC, Calemard E, Laurent G. Central venous catheters for haemodialysis: looking for optimal blood flow. Nephrol Dial Transplant. 1997;12:1689–1691