The survey of the correlation between ultrasonographic findings in pediatrics’ kidney with GFR level with an emphasis on the role of the employed transducer

Abstract

The aim of this study was to investigate the relationship between ultrasound findings in children’s kidney with GFR based on the type of probe used for evaluations. Materials and Methods This descriptive study was conducted on 80 pediatric patients with kidney problems. Ultrasonography was performed by an experienced radiologist. The GFR calculated using Schwartz formula. The relationship between the sizes of the kidney and GFR was assessed with Pearson correlation coefficient test. Also the correlation between the echogenicity of kidney based on the linear and convex probe with GFR was investigated. Results In this study, 80 patients were enrolled, 48 of whom (60%) were male. The mean age of patients was 5.57 ± 3.45 years. The mean length of all right and left kidney, were 82.05±14.22 mm and 84.52±15.97 mm, respectively; the length of kidneys were not significantly different (P Value: 0.06). The mean of GFR was 62/40 ± 25/84. The positive correlation between GFR with the right and left kidneys were found (P Value: 0.000). Also, the relationship between linear and convex probes and decrease in GFR was statistically significant (P Value: 0.004, P Value: 0.013, respectively). Positive predictive value (PPV),negative predictive value (NPV),sensitivity and specificity of linear probe were 73.8%,57.8%,65.95% and 66.66%, respectively.Also positive predictive value (PPV), negative predictive value(NPV),sensitivit and specificity of convex probe were 74.2%,53.3%,55.13% and 72.72%, respectively.