Table 3

Comparison of flow rates achieved compared with manufacturers stated maximum flow rate

Line typeLength (mm)Stated flow rate by manufacturer at 75 mm Hg (mL/min)Estimated pressure needed to achieve this flow rate in our system (mm Hg)Proportion of stated flow achieved at 75 mm Hg (%)
18G cannula4010020040
20G cannula326515058
5Fr umbilical line4002412571
4Fr umbilical line40011.375100
  • No manufacturer flow rate information was available for all three haemodialysis catheters or central line.