Simple, Age-based Formula for Predicting Renal Length in Children - 06/08/11
Reprint requests: Jeffrey Stock, M.D., Department of Urology, Mount Sinai Medical Center, One Gustave L. Levy Place, New York, NY 10029Résumé |
Objective |
To determine a simple, age based formula for predicting ideal renal length in children. Renal size is a valuable marker in the evaluation of children with urological disorders. Although many authors have described complex nomograms and multivariate formulas for determining renal size, we propose a simple and accurate formula.
Material and Methods |
All renal ultrasound (US) studies performed over a 9-year period in patients <18 years of age were retrospectively evaluated, excluding patients with a history of urinary tract disease or with abnormal renal US findings.
Results |
Ultrasounds were performed in 778 children <18 years who met inclusion criteria. Sixty-one percent of the patient population was ≥1 year of age at the time of the US. Forty-four percent of the children were male. In children 1 year of age or older, the formula was length (cm) = age (years) × 0.3 + 6, R2 = .81. In infants younger than 1 year, renal length was poorly estimated by a simple age-based formula.
Conclusion |
Our proposed formula can be used to predict renal length in children older than 1 year.
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Vol 78 - N° 2
P. 405-410 - août 2011 Retour au numéro
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