IRCT2015031214333N30 IRCT 2015-05-07 Kermanshah University of Medical Sciences Study of two types of Permanent Hemodialysis Recirculation in Fixed Tip and Split Tip Catheters in chronic renal failure patients Comparing permanent hemodialysis recirculation with fixed tip and split tip catheters in chronic renal failure patients 2014-05-22 anticipated 164 Complete https://irct.ir/trial/13966 interventional Randomization: N/A, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A Chronic Kidney Disease. Intervention 1: In the first group, after prep and drep the patients and creating proper position in neck extension, internal Jugular vein is found at bifurcation of Sternocleidomastoid muscle in Supraclavicular triangle toward Niple at the same side with needle guide. The main needle of fixed tip catheter set will be placed on the needle Dialysis will be ceased 30 minutes later at optimal flow 250ml/m. Simultaneously, three blood samples are taken from artery and venous dialysis and also upper extremity vein opposite to catheter embedding. Samples are sent to laboratory to determine their urea levels and dialysis resumes. Finally, considering the urea level in blood, blood recirculation is measured using three needles method. Intervention 2: In the second groups, after prep and drep the patients and creating proper position in neck extension, internal Jugular vein is found at bifurcation of Sternocleidomastoid muscle in Supraclavicular triangle toward Niple at the same side with needle guide. In the second group the main needle of split tip catheter set will be on the needle. Dialysis will be ceased 30 minutes later at optimal flow 250ml/m. Simultaneously, three blood samples are taken from artery and venous dialysis and also upper extremity vein opposite to catheter embedding. Samples are sent to laboratory to determine their urea levels and dialysis continues. Finally, considering the urea level in blood, blood recirculation is measured using three needles method. .