Related Experiment Video

Updated: Jun 28, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
06:05

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

[Evolving pattern of bladder dysfunction in boys with posterior urethral valves (PUV)]

Michał Maternik1, Aleksandra Zurowska, Piotr Czarniak

  • 1Klinika Chorób Nerek i Nadciśnienia Dzieci i Młodziezy Akademii Medycznej w Gdańsku. mmaternik@amg.gda.pl

Polski Merkuriusz Lekarski : Organ Polskiego Towarzystwa Lekarskiego
|October 18, 2008
PubMed

Insights

The pattern of bladder dysfunction in boys with posterior urethral valves (PUV) changes as they age. Younger boys show more compliance issues and instability, while older boys have lower bladder pressures.

Area of Science:

  • Pediatric Urology
  • Urodynamics
  • Voiding Dysfunction

Context:

  • Posterior urethral valves (PUV) are a common congenital anomaly in male infants.
  • Bladder dysfunction affects a significant majority (50-80%) of boys with PUV.
  • Understanding the evolution of bladder dysfunction is crucial for long-term management.

Purpose:

  • To investigate the impact of age on the characteristics of voiding dysfunction in boys with PUV.
  • To compare urodynamic findings between younger and older age groups of boys diagnosed with PUV.

Summary:

  • A urodynamic analysis was conducted on 62 boys with PUV, categorized into younger (mean age 6.02 years) and older (mean age 15.6 years) groups.
  • Younger boys exhibited a higher incidence of decreased bladder compliance, detrusor instability, and detrusor sphincter dyssynergy.
  • Older boys demonstrated a greater prevalence of low detrusor pressure.

Impact:

  • The findings indicate a distinct evolution of bladder dysfunction patterns in boys with PUV as they mature.
  • This age-dependent understanding can inform tailored treatment strategies and improve patient outcomes.
  • Highlights the dynamic nature of bladder issues in PUV patients over time.
Abstract

More Related Videos

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing05:25

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing

Published on: August 14, 2019

Vessel-sparing Excision and Primary Anastomosis08:09

Vessel-sparing Excision and Primary Anastomosis

Published on: January 7, 2019

Related Concept Videos

Urodynamic Studies: Uroflowmetry01:19

Urodynamic Studies: Uroflowmetry

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...
Anatomy of the Genitourinary System II: Bladder and Urethra01:19

Anatomy of the Genitourinary System II: Bladder and Urethra

The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...
Urinary Bladder01:23

Urinary Bladder

The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations01:26

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...
Disorders of the Urinary System01:20

Disorders of the Urinary System

The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...
The Micturition Reflex01:26

The Micturition Reflex

Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating urine...