Uroflow Rate Nomogram in 4-12 Year Old Korean Girls / 대한비뇨기과학회지

ABSTRACT

PURPOSE: To establish normal reference ranges of urinary flow rate related to age, body surface area and voided volume in normal Korean pediatric females, uroflowmetry was performed and analyzed statistically. MATERIALS AND METHODS: Uroflowmetry was performed on total 270 normal pediatric females who ranged in age from 4 to 12 years(mean+/-SD 7.23+/-1.97 years). The height and weight were measured then body surface area was calculated by Mosteller`s formula. The uroflow data(peak and average flow) were grouped by age(4 to 6, 7 to 9 and 10 to 12 years old) and body surface area( 1.1 and<1.1 m2) then plotted in volume-related nomograms. RESULTS: Mean values of peak and average flow rates were 13.33+/-4.44 & 7.51+/-2.6, 14.01+/-5.22 & 7.76+/-3.15, 20.40+/-6.84 & 10.89+/-3.97 ml/sec in each age group, and 13.57+/-4.87 & 7.61+/-2.96, 20.14+/-6.44 & 10.65+/-3.79 ml/sec in each body surface area group, respectively. Flow rates were increased significantly with voided volume, age and body surface area. Body surface area was found to be a more reliable index than age in the establishment of nomograms(p<0.05). CONCLUSIONS: Nomograms of peak and average flow rates of normal Korean pediatric female were presented. These may be useful for diagnosing lower urinary tract disturbances in pediatric female over a wide range of age, body size and voided volumes.