A prospective study on the consistency and reproducibility of uroflowmetry studies and post void residual measurements at a bladder volume of 50-100% of estimated bladder capacity in children

ABSTRACT

OBJECTIVE: There are no standard ways and guidelines in uroflowmetry and post void residual (PVR) measurements in children. We assessed the repeatability and consistency of uroflowmetry and PVR determination in children at a bladder volume of 50-100% of the estimated bladder capacity (EBC).METHODS: Twenty-five children, ages 3-8 years, underwent uroflowmetry and post void urine measurements. Values were taken for 3 consecutive micturitions at a bladder volume of 50-1 00% ofthe EBC, as measured by transabdominal ultrasound. Uroflowmetry parameters and PVR were analyzed and recorded.RESULTS: There were no significant differences in the measurements across three trials for maximum flow rate (Qmax) and prevoid urine volume. There were significant differences in the measurements of PVR and uroflowmetry curves. PVR urine volumes were not related to prevoid urine volumes. Age, height and weight were related to the prevoid volumes.CONCLUSION: Uroflowmetry and PVR tests will give informative and reliable values at a volume of 50-100% of EBC. In cases of any abnormal flow pattern at this bladder capacity, a repeat examination is prude