الفهرس 
Types of arteriovenous shuntOnly 14 pages are availabe for public view
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Abstract
Chronic renal failure patients for whom long term hemodialysis is required had been increased nowadays and representing a higher percentage of the Egyptian population. The arteriovenous fistulae have become the most widely used vascular access for those patients on regular hemodialysis. The aim of the our present study is to evaluate the role of color coded Doppler imaging (CCDI) in the pre and postoperative assessment of the hemodialysis arteriovenous fistulae (AVF) to predict the hemodynamic parameters of success when creating AVFs. This study include 44 patients ( 25 males and 19 females ) All patients were examined by B <U+2013> mode and CCDI, and Doppler indices were obtained such as PSV, RI, blood flow rate of the inflow artery, subclavian vein and the fistulae. The study showed that patients undergoing AVF operation, color coded Doppler imaging of the preoperative homodynamic changes of the ipsilateral subclavian vein and fistulae inflow artery give a good predictor of the outcome of the AVF. Preoperative subclavian vein flow rate more than or equal to 400mL / min was associated with high success rate of more than 96.15%. Also the blood flow rate of the main inflow artery of the fistulae more than or equal to 40mL / min was associated with a high success rate of more than 96.15%. It is recommended that CCDI should be performed in all patients who will perform hemodialysis AVF, both pre and postoperatively and also in all patients suspected to have hemodialysis access dysfunction. Also, we concluded that CCDI can predict the immediate success of the AVF, can help in choice of the type of the AVF and can detect the native and synthetic access dysfunction.