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| Kidney Length in Normal Korean Children |
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| In-One Kim, MD1 Jung-Eun Cheon, MD1, Young Seok Lee, MD2, Sun Wha Lee, MD3,
Ok Hwa Kim, MD4, Ji Hye Kim, MD5, Hong Dae Kim, MD1,6, Jung Suk Sim, MD1,7 |
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| 1Department of Radiology and the Institute of Radiation Medicine, Seoul National University College of Medicine,
2Department of Radiology, Dankook University College of Medicine
3Department of Radiology and Medical Research Institute, Ewha Womans University College of Medicine
4Department of Diagnostic Radiology, Ajou University College of Medicine
5Department of Radiology and the Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine Current Addresses:
6Department of Radiology, Kangnam Sacred Heart Hospital, College of Medicine, Hanllym University
7Department of Radiology, Mothers Clinic, Bundang, Seongnam City, Kyeonggi-do |
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| Purpose: Renal length offers important information to detect or follow-up various
renal diseases. The purpose of this study was to determine the kidney length of normal
Korean children in relation to age, height, weight, body surface area (BSA), and
body mass index (BMI).
Materials and Methods: Children between 1 month and 15 years of age without
urological abnormality were recruited. Children below 3rd percentile and over 97th
percentile for height or weight were excluded. Both renal lengths were measured in
the prone position three times and then averaged by experienced radiologists. The
mean length and standard deviation for each age group was obtained, and regression
equation was calculated between renal length and age, weight, height, BSA, and BMI,
respectively.
Results: Renal length was measured in 550 children. Renal length grows rapidly
until 24 month, while the growth rate is reduced thereafter. The regression equation
for age is: renal length (mm) = 45.953 + 1.064 × age (month, ≤ 24 months) (R2 =
0.720) or 62.173 + 0.203 × age (months, > 24 months) (R2 = 0.711). The regression
equation for height is: renal length (mm) = 24.494 + 0.457 × height (cm) (R2 = 0.894).
The regression equation for weight is: renal length (mm) = 38.342 + 2.117 × weight
(kg, ≤18 kg) (R2 = 0.852) or 64.498 + 0.646 × weight (kg, > 18 kg) (R2 = 0.651). The
regression equation for BSA is: renal length (mm) = 31.622 + 61.363 ×BSA (m2, ≤
0.7) (R2 = 0.857) or 52.717 + 29.959 × BSA (m2, > 0.7) (R2 = 0.715). The regression
equation for BMI is: renal length (mm) = 44.474 + 1.163 × BMI (R2 = 0.079).
Conclusion: This study provides data on the normal renal length and its association
with age, weight, height, BSA and BMI. The results of this study will guide the
detection and follow-up of renal diseases in Korean children. |
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| Keyword : Kidney; Ultrasonography; Length; Measurement |
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pdf파일 : 181-188김인원.pdf 
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> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2010 ; 29 (3) : p.181-188
