Sonographic measurement of renal size in normal North Indian children

Objective: To determine the renal size in normal North Indian children by renal sonography. Design: Hospital based (outpatient based) cross sectional observational study. Material and methods: Total 1198 normal children aged 1 month to 12 years were included in the study. Sonographic assessment of renal size (length, width and thickness) was performed using Philips, multi frequency (3.5, 5 and 7.5 Mhz) linear and convex probes in B-mode. The mean renal dimensions and volume were calculated for each age group with ± 2SD. The renal length and calculated renal volume were correlated with somatic parameters like age, weight, height, and body surface area (BSA). Linear Regression equations were derived for each variable. Results: A strong correlation was seen between renal size and renal volume with various somatic parameters (age, weight, height, BSA), (coefficient of correlation = 0.9). Conclusion: This study provides values of renal size (mean ± 2SD) in normal North Indian children and its correlation with age, weight, height, and BSA. Renal size can be easily calculated by derived linear regression equation.