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Bladder dysfunction in boys with posterior urethral valves before and after puberty
G Holmdahl1, U Sillén, E Hanson
1Department of Pediatric Surgery, Children's Hospital, Göteborg, Sweden.
Insights
Posterior urethral valves in boys show evolving bladder dysfunction over time, with instability decreasing and capacity increasing. This progression can lead to emptying difficulties and decompensation in later years.
Area of Science:
- Pediatric Urology
- Developmental Urology
Background:
- Posterior urethral valves (PUV) are a common congenital anomaly in male infants.
- Early diagnosis and management are crucial to prevent long-term renal damage.
- Understanding the natural history of bladder dysfunction in PUV is essential for optimal patient care.
Purpose of the Study:
- To characterize the longitudinal changes in bladder dysfunction in boys with posterior urethral valves.
- To investigate the evolution of urodynamic patterns from childhood to adolescence.
Main Methods:
- A cohort of 12 prepubertal boys with PUV, diagnosed before age 1, was followed from ages 4 to 14 years.
- Comparison was made with 6 postpubertal boys with PUV.
- Repeated urodynamic evaluations and renal function studies were performed.
Main Results:
- Patients exhibited a dynamic urodynamic pattern characterized by decreasing instability over time.
- Bladder capacity increased, while voiding contractions were often unsustained, leading to emptying difficulties.
- Postpubertal boys presented with high-capacity, poorly contractile bladders.
Conclusions:
- The observed urodynamic patterns in PUV bladders (unstable, poorly compliant, overdistended) represent variations of a single evolving condition.
- This pattern shifts over time towards decompensation, highlighting the need for ongoing monitoring.
Purpose:
We characterized bladder dysfunction in boys with posterior urethral valves during childhood and adolescence.
Materials And Methods:
A total of 12 prepubertal boys with posterior urethral valves presenting before age 1 year was followed from ages 4 to 14 years and compared to 6 postpubertal boys with posterior urethral valves. Urodynamic evaluations and renal function studies were performed repeatedly.
Results:
Patients had a changing urodynamic pattern with instability decreasing with time, increasing bladder capacity and commonly an unsustained voiding contraction causing emptying difficulties. Postpubertal boys had high capacity bladders with low contractility.
Conclusions:
We suggest that previously described urodynamic patterns of the valve bladder (unstable, poorly compliant and over distended bladders) are variations of the same basic pattern that changes with time toward decompensation.