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  • Title: Analysis of uroflow patterns in children with dysfunctional voiding.
    Author: Wenske S, Van Batavia JP, Combs AJ, Glassberg KI.
    Journal: J Pediatr Urol; 2014 Apr; 10(2):250-4. PubMed ID: 24290223.
    Abstract:
    OBJECTIVE: Although a staccato uroflow pattern is considered representative of dysfunctional voiding (DV), we recently found that only a third of children with staccato flow had an active pelvic floor electromyography (EMG) during voiding. Here, we analyzed the reverse, that is, how often a staccato flow pattern occurs in children with documented DV. In addition, we reviewed what other flow patterns are prevalent in this condition. MATERIALS AND METHODS: We reviewed our LUT dysfunction registry for children with EMG-confirmed DV. Uroflow patterns were categorized as staccato, interrupted, mixed (i.e., staccato and interrupted patterns), or grossly normal. RESULTS: Of 596 children who underwent a uroflow/EMG examination, 121 had an active pelvic floor EMG during voiding, that is a finding consistent with the diagnosis of DV. The flow patterns identified in those diagnosed with DV were staccato in 70 (58%), interrupted in 22 (19%), mixed in 12 (10%), and a bell-shaped or depressed curve in 17 (14%). Staccato pattern became normal in 96% following successful treatment with biofeedback. CONCLUSIONS: While a staccato uroflow pattern was the most common pattern seen in children diagnosed with DV by a uroflow/EMG, nearly a third had an interrupted or mixed flow pattern underscoring the importance of performing simultaneous pelvic floor EMG during a uroflow study, especially when trying to rule out DV. Failure of the staccato flow pattern to normalize after therapy strongly suggests either inadequate therapy or an incorrect diagnosis.
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