Lijec̆nic̆ki vjesnik
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Lijec̆nic̆ki vjesnik · Jan 2003
[Recirculation of urea and dialysis efficiency using dual-lumen dialysis catheters in various locations: may the venous lumen of the catheter be used as the arterial lumen and vice versa?].
To measure percentage of urea recirculation in hemodialysis by a dual-lumen central venous catheters of various localisations (e.g. jugular, subclavian and femoral), and also in cases when the venous lumen of the catheter is used as arterial lumen, and vice versa, and under these conditions to evaluate the efficiency of hemodialysis based on the measurements of urea reduction ratio. ⋯ When hemodialysis is delivered by a correct blood lines connection the measurements have shown a decrease in urea recirculation by 5% for jugular and subclavian catheters, and 5%-10% for femoral catheters. However, in cases when the venous lumen of the catheter is used as an arterial lumen, and vice versa, urea recirculation is below 10% for jugular catheters; whereas in femoral catheters the percentage is higher than 20%. Despite so high percentage of urea recirculation, that we obtained for such use of the catheters, urea reduction ratio in hemodialysis via jugular and subclavian catheters is > 60%, whereas via femoral catheters, the percentage is significantly lower. Consequently, the efficiency of hemodialysis is reduced, and such use of femoral catheters should therefore be avoided.