Four hour voiding observation study in infants with posterior urethral valves

Area of Science:

• Pediatric Urology
• Neonatal Surgery
• Bladder Dysfunction Management

Background:

• Posterior urethral valves (PUV) are a common congenital anomaly in male infants.
• PUV can lead to significant bladder dysfunction and potential long-term renal damage.
• Early assessment of bladder function post-resection is crucial for guiding management.

Purpose of the Study:

• To prospectively evaluate bladder function in infants following primary posterior urethral valve resection.
• To identify patterns of bladder dysfunction and variability in voiding parameters.
• To gather evidence to guide early clinical management strategies.

Main Methods:

• Prospective evaluation of 61 infants with PUV between July 2015 and 2020.
• Measurement of voiding frequency, voided volume (VV), post-void residual (PVR), and bladder capacity (BC).
• Statistical analysis using t-tests and chi-square tests to compare groups.

Main Results:

• Significant variability in bladder emptying was observed between patients and within individual patients.
• Approximately 40% of infants exhibited abnormal bladder capacity.
• Nearly half of the infants had significant post-void residuals (PVR > VV) at least once post-resection.

Conclusions:

• Non-invasive assessment reveals considerable bladder function variability in infants post-PUV resection.
• A substantial proportion of infants demonstrate abnormal bladder capacity and significant PVR.
• These findings support tailored early interventions for infants at risk of persistent bladder dysfunction.