Voiding efficiency and urodynamic parameters in pediatric patients with posterior urethral valves

Area of Science:

• Pediatric Urology
• Urodynamics
• Medical Research

Background:

• Posterior urethral valves (PUV) are a common congenital anomaly in male infants.
• Urodynamic studies are crucial for assessing lower urinary tract function.
• Voiding efficiency (VE) is a key parameter but not routinely used in pediatric practice.

Purpose of the Study:

• To compare voiding efficiency (VE) and other non-invasive urodynamic parameters.
• To differentiate between patients with a history of posterior urethral valves (PUV) and controls without lower urinary tract anatomical abnormalities.

Main Methods:

• Retrospective case-control study (2012-2022).
• Included 50 patients with PUV history and 50 controls.
• Collected clinical data, urodynamic parameters, lag time, and VE; analyzed using t-tests, Mann-Whitney U, Kruskal-Wallis, and chi-squared tests.

Main Results:

• The PUV group exhibited higher postvoiding residual volume (9 ml vs. 3 ml, p=0.025).
• A longer lag time was observed in the PUV group (3.7 s vs. 2.6 s, p=0.006).
• Lower voiding efficiency (VE) was found in PUV patients (93.8% vs. 98%, p=0.020).

Conclusions:

• Urodynamic alterations are more common in patients with a history of PUV.
• Voiding efficiency (VE) is a valuable, easily measurable parameter for pediatric urodynamics.
• VE can be significantly lower in pediatric PUV patients compared to those without anatomical urethral issues.