Caspian Journal of Internal Medicine

en Glomerular filtration rate determination by creatinine and cystatin-C in patients with acute pyelonephritis Nephrology Nephrology Original Article Original Article Background: Measurement of glomerular filtration rate (GFR) and monitoring of it in any patient on nephrotoxic drugs is very important. Recently, cystatin C (cys-C) has been introduced as a better marker for determining and monitoring renal function than creatinine especially in a mild decrease of GFR. This study was done to assess the change of GFR measurement based on serum Cys-C and creatinine and their comparison in children with acute pyelonephritis on amikacin. Methods: All children with acute pyelonephritis who were admitted in Nephrology ward were enrolled in this study. Serum creatinine, serum cys-C and the GFR calculation based on them were measured in patients on the day of admission (day zero) and then on days 3 and 7 after the start of treatment with amikacin and p-value less than 0.05 was considered significant. Results: Among the 70 children, 61 patients were females and the others were males. Mean age was 42.66±41.53 months. Estimated GFR based on creatinine on day 0 (before amikacin administration), 3 and 7 were 72.41±20.89 ml/min/1.73 m2, 78.42±21.15 ml/min/1.73 m2 and 80.5±22.43 ml/min/1.73 m2, respectively. Moreover, GFR based on cys-C during these days were 116.23±58.9 ml/min/1.73 m2, 116.49±53.31 ml/min/1.73 m2 and 108.37±51.02 ml/min/1.73 m2, respectively (p<0.05). Conclusions: According to this study, decrease of GFR calculation based on Cys-C was seen and estimated GFR was not changed according to creatinine. So, we recommend the use of cys-C for the monitoring of renal function in any patient treated with nephrotoxic drugs such as amikacin. Nephrotoxicity, Amikacin, Cystatin C, Creatinine, Acute pyelonephritis, Glomerular filtration rate 290 295 http://caspjim.com/browse.php?a_code=A-10-372-1&slc_lang=en&sid=1 Hadi Sorkhi hadisorkhi@yahoo.com 100319475328460013090 100319475328460013090 Yes Non-Communicable Pediatric Diseases Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran Raheleh Behzadi ahelehbehzadi@yahoo.com 100319475328460013091 100319475328460013091 No Student Research Committee, Babol University of Medical Sciences, Babol, Iran Neda Joghtaei nedaj1990@gmail.com 100319475328460013092 100319475328460013092 No Non-Communicable Pediatric Diseases Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran Mohammad Poornasrollah mohammadpoornasrollah@yahoo.com 100319475328460013093 100319475328460013093 No Non-Communicable Pediatric Diseases Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran Ali Bijani alibijani@yahoo.com 100319475328460013094 100319475328460013094 No Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran