Determining reduction proportion of blood urea in patients under hemodialysis in dialysis department of Ekbatan hospital and comparison between obtained results and standard scales.

          This study was descriptive, cross - Sectional. In this study the number of 100 patient under dialysis in were evaluated and their blood samples were accumitated before and after dialysis and were transferred to the laboratory. Results were calculated by BUN formula, meanwhile the other parameters as, the time of dialysis, speed of blood circulation, percentage of filter clearance, patient weight before and after dialysis, blood pressure
   before and after dialysis, also evaluated and registered.

          To consider the obtained results from BUN calculations we found out that 10% of individuals have URR≥65%. In that the results are in accord with standard scales, and revealed adequate dialysis. About 34% were near accepted range (55%-64%). The rest of individuals about 56% were lower than accepted URR.