[Ecographic study of kidney size in children]

The objective of this study is the determination of the normal kidney size in children analysing the variables that have a good correlation with it. With these correlations the normal kidney size can be established and a diagnose of possible diseases set.

The data was obtained through ecographies taken in 474 children between 0 and 18 years old that were under control for several reasons differently from the suspicion of a kidney disease. The information related to age, sex, weight, height and corporal surface was also taken.

We studied 265 girls and 209 boys. No difference was obtained between the size of the girls and boys kidneys. The regression analysis of the left kidney shows correlations of 0.911 for the height, 0.896 for the corporal surface, 0.863 for the weight and 0.857 for the age; while the one of the right kidney shows correlations of 0.921 for the height, 0.902 for the corporal surface, 0.872 for the age and 0.871 for the weight. The determination coefficients were 0.83 for the left kidney and 0.85 for the right one. The multivariant analysis shows that for both kidneys the height and the age are variables statistically significant as well as the corporal surface for the left kidney.

The size parameters measured in the kidneys show a statistically significance correlation with certain parameters of the growing. The maximum correlation appears for the height of the patient, which allows establishing regression equations with the kidney size and the height and therefore to detect any deviations from these regression curve.