Uroflowmetry and postvoid residual urine tests in incontinent children
Journal
Pediatric Incontinence: Evaluation and Clinical Management
Pages
99-106
Date Issued
2015
Author(s)
Yang S.S.-D.
Abstract
Uroflowmetry and postvoid residual urine (PVR) tests are the first-line diagnostic tools for toilet-trained children with lower urinary tract symptoms (LUTS). Among the parameters generated from uroflowmetry, voided volume, flow curve, and Qmax were most relevant parameters for interpretation. Because these parameters were dependent on bladder capacity, uroflowmetry with a bladder capacity between 50% and 115% of expected bladder capacity is more reliable. According to ICCS' definition, the uroflow curves can be classified as bell-shaped, tower-shaped, plateau, staccato, and interrupted types. Only bell-shaped curve is regarded as normal. Since the interobserver's agreement on normalcy of flow pattern was high, but on specific flow pattern was low, uroflowmetry can be simply classified as normal and abnormal flow pattern. For children age 6 years or below, a single PVR > 30 mL or >21% BC can be regarded as elevated. For children 7 years old or above, a single PVR > 20 mL or 15% BC can be defined as elevated. We suggest repetitive uroflowmetry and PVR tests if the result of the first test is abnormal.
Publisher
Wiley Blackwell
Type
book part