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- Title
A comparative study of methods of estimating kidney length in kidney transplantation donors.
- Authors
Kiw-Yong Kang; Young Joon Lee; Soon Chul Park; Chul Woo Yang; Yong-Soo Kim; In Sung Moon; Yong Bok Koh; Byung Kee Bang; Bum Soon Choi
- Abstract
Background. Knowledge of kidney size is important for clinical assessment of renal disease. However, there are few studies on methods of assessing kidney size. The purpose of this study was to determine the usefulness of body index and radiological measurements for prediction of kidney size. Methods. One hundred and twenty five donors were enrolled. The sizes of donor kidneys obtained after nephrectomies for kidney transplantations were documented and the correlation coefficient between kidney length and body index was calculated. Kidney length was estimated from the distance between the first and third lumbar vertebrae (L1-3), intravenous pyelograms (IVPs), abdominal ultrasonography (US), and abdominal computed tomography (CT). Results. Normal adult kidneys were 11.08 ± 0.96âcm long, 6.25 ± 0.67âcm wide, 4.73 ± 0.65âcm thick and weighed 196.3 ± 41.0âg. Correlation coefficients between kidney length and body height, body weight, body surface area and total body water content were 0.29, 0.31, 0.26, and 0.32, respectively. The difference between actual and predicted kidney lengths was â0.6 cm for L1-3, .2âcm for IVPs, â0.7âcm for abdominal US, â0.8âcm for transverse CT section, and â0.5âcm for coronal CT section. Conclusions. Abdominal coronal CT section predicted kidney length more accurately than other radiological methods, but all radiological methods were associated with prediction errors. As kidney length was correlated with body index, it is suggested that body index is the most useful and simplest method of estimating kidney size as an adjunct to treatment decisions concerning renal disease.
- Subjects
TRANSPLANTATION of organs, tissues, etc.; ORGAN donors; KIDNEY diseases; COMPARATIVE studies
- Publication
Nephrology Dialysis Transplantation, 2007, Vol 22, Issue 8, p2322
- ISSN
0931-0509
- Publication type
Article
- DOI
10.1093/ndt/gfm192