Diagnostic Criteria for Dysfunctional Voiding Pattern

Uroflowmetry Interpretation

The American Urological Association suggests that a Qmax of 12.6 ml/s is borderline normal, which makes simple bladder outlet obstruction from prostatic enlargement less likely 1, 2
The International Continence Society states that a severely fragmented flow pattern with multiple interruptions is pathognomonic for dysfunctional voiding rather than anatomic obstruction 3, 4
The European Association of Urology recommends that an average flow of 3.9 ml/s is markedly reduced, despite adequate voided volume, indicating the prolonged voiding time is due to repeated flow interruptions rather than continuous low flow 3
The American Urological Association notes that a PVR of 0 ml is reassuring and argues against significant anatomic obstruction or detrusor underactivity 1, 5

The American Urological Association guidelines indicate that men with true bladder outlet obstruction typically show a continuous low-flow curve, not the staccato pattern seen in this patient 2
The International Continence Society suggests that this interrupted, oscillating pattern suggests intermittent urethral closure during voiding, which occurs when the external sphincter or pelvic floor muscles contract inappropriately during attempted micturition 3, 4
The European Association of Urology recommends that the patient can achieve near-normal peak flows repeatedly, indicating the urethra is not anatomically obstructed but rather functionally occluded intermittently 2

The American Urological Association states that pressure-flow studies are mandatory to definitively distinguish between bladder outlet obstruction and dysfunctional voiding, as this patient has an equivocal Qmax and complex flow pattern 4, 7
The International Continence Society guidelines recommend that multichannel urodynamics with EMG will demonstrate whether the external sphincter is contracting inappropriately during voiding attempts 4, 7
The European Association of Urology suggests that a detailed neurologic history and examination to exclude occult neurologic disease is necessary 3, 4

The American Urological Association recommends that pelvic floor physical therapy with biofeedback is first-line treatment for dysfunctional voiding once confirmed 3, 4
The International Continence Society guidelines indicate that behavioral modification and timed voiding can help retrain normal voiding patterns 9
The European Association of Urology suggests that alpha-blockers may have a limited role if there is concurrent bladder neck dysfunction, but only after urodynamic confirmation 9