[Comparative study between 20 IU/ml heparin and 5% heparin/urokinase 5000 IU lock in hemodialysis central venous catheters with permeability problems].

Background: The central venous catheter prevalence as a permanent hemodialysis vascular access is growing in the last years. However, there is no consensus in the scientific community about what is the most appropriate lock solution to avoid complications.

Aim: To compare the effectiveness and the cost between heparin 20 IU/ml (SH20) lock solution versus usual pattern (UP), consisted on 5% heparin/5000 IU urokinase lock solution in hemodialysis catheters with patency problems.