Morphometric Study of Renal Sizes and Weight in Korean Adults

Lee, Chang Kyu; Yoo, So Jin; Rhew, Hyun Yul

Abstract

This study is standard surgical measurement of the size of kidney in normal Korean population that might be basic data of renal size in comparison with radiographic and ultrasonographic measurement for clinical implies. The 235 cases of donors for renal transplantation were measured by the length, width, thickness, weight and the outer diameter of renal vessels as well as identification of branches of renal vein at the time of donor nephrectomy. These data were tested to statistically significant by T- test, ANOVA, Pearson correlation analysis and multivariate analysis. The mean values of renal size were 11.6+/-0.87 (9.2-15.4cm) x 6.1+/-0.81 (4.4-10.0cm) x 4.9+/-0.75(2.2-7.1cm) for male 11.7+/-0.77 (9.8-14.0cm) x 6.2+/-0.85 (4.5-10.0cm) x 5.O+/-0.77 (2.8- 7.1cm) and for female 11.4+/-0.96 (9.2-15.4cm) x 6.0+/-0.75 (4.4-8.2cm) x 4.8+/-0.7 (2.2-7.0cm). The mean value of renal weight were 183.1+/-36.92 (115.0-370.0gm) : for male 188.2+/-40.10 (120.0-370.0gm) and for female 177.6+/-32.41 (115.0-300.0gm). The width, thickness and weight of kidney were larger in male than in female (p<0.05). I found out that the age of donors did not affect the renal length, width, thickness and weight (p>0.05). The renal length, width, and weight increased proportional to the body weight (p<0.05). The renal thickness and weight were different in each range of the body height (P<0.05). The body weight had correlation with renal length (r=0.25), thickness (r=0.32), weight (r=0.36, p<0.001) and width (r=0.16, p<0.05). The body height was correlated well with renal length (r=0.20), thickness (r=0.18) and weight (r=0.25, p<0.05). The body weight was the most reliable factor affecting renal size and weight in multivariate analysis (p<0.05). The mean number of branches of renal vein was 0.36+/-0.63 (0.0-2.0) in right kidney and 3.12+/-0.76 (1.0-6.0) in left one. The mean diameter of the renal artery was 0.61+/-0.132 (0.3-1.0cm) and the mean diameter of the renal vein 1.46+/-0.132 (0.50-2.20cm). The radiographic measurement of renal size was larger than our surgical measurement. The mean renal length and width in radiographic measurement(IVP) were 12.1+/-0.70cm in right kidney, 12.1+/-0.65cm in left one and 6.4+/-0.54cm in right kidney, 6.8+/-0.45cm in left one versus 11.6+/-0.87cm, 11.6+/-0.89cm and 6.1+/-0.81cm, 6.1+/-0.84cm in surgical measurement. Surgical measurements of renal size of donors at the time of renal transplantation were real renal size despite of radiographic and ultrasonographic measurement and provided basic standard data for Korean population that might be utilized in approaching renal disease.