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Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...
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Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements
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Can urodynamic studies predict bladder behaviour changes after artificial urinary sphincter implantation?

P López Pereira1, I Somoza, M J Martínez Urrutia

  • 1Department of Paediatric Urology, University Hospital La Paz, P degrees de la Castellana 261, Madrid 28046, Spain. plpuro@hotmail.com

Journal of Pediatric Urology
|October 25, 2008
PubMed
Summary

Preoperative urodynamic studies cannot predict bladder augmentation needs in patients with neuropathic incontinence after artificial urinary sphincter (AUS) implantation. Long-term monitoring is essential for detecting asymptomatic detrusor behavior changes.

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Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
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Published on: August 9, 2012

Area of Science:

  • Urology
  • Pediatric Urology
  • Nephrology

Background:

  • Neuropathic incontinence often requires advanced management strategies.
  • Artificial urinary sphincter (AUS) implantation is a treatment option for severe urinary incontinence.
  • Predicting the need for bladder augmentation post-AUS is crucial for patient management.

Purpose of the Study:

  • To evaluate the predictive value of preoperative urodynamic studies for bladder augmentation necessity.
  • To assess changes in bladder capacity and compliance after AUS implantation.
  • To identify factors influencing bladder behavior post-AUS in neuropathic patients.

Main Methods:

  • Retrospective analysis of 17 patients with neuropathic incontinence undergoing AUS implantation without prior augmentation.
  • Regular urodynamic studies (minimum 3 pre-implantation, yearly post-implantation) were conducted.
  • Bladder capacity and compliance were monitored to predict the need for augmentation.

Main Results:

  • After a mean follow-up of 7.5 years, 6 out of 17 patients required bladder augmentation.
  • In augmented patients, bladder capacity decreased significantly (67% to 39.6% AEC) and compliance reduced (31.6 to 13.5 ml/cm H2O).
  • No significant differences in preoperative bladder capacity or compliance were found between patients who did and did not require augmentation.

Conclusions:

  • Preoperative urodynamic studies are not reliable predictors of bladder function outcomes after AUS implantation.
  • Patients require vigilant, long-term clinical observation to detect potential asymptomatic detrusor behavior changes.
  • Asymptomatic changes in bladder behavior necessitate careful monitoring and potential intervention.