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Related Concept Videos

Imaging Studies VI: Voiding Cystourethrography and Cystography01:22

Imaging Studies VI: Voiding Cystourethrography and Cystography

Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
Ureters01:22

Ureters

The ureters are retroperitoneal tubes located on either side of the vertebral column. They are responsible for transporting urine from each kidney to the urinary bladder. These tubes have thick walls and are approximately 25-30 cm long. Their diameter is around 10 mm at the renal pelvis, gradually narrowing to 1 mm as the ureter obliquely enters the posterior bladder wall through the ureteric orifices. The shape of these orifices is slit-like, which helps to prevent urine backflow toward the...
Acute Pyelonephritis I: Introduction01:27

Acute Pyelonephritis I: Introduction

Pyelonephritis is a bacterial infection that primarily affects the renal parenchyma and collecting system, including the renal pelvis, tubules, and interstitial tissue of one or both kidneys. It can be classified as either acute—a sudden, severe infection—or chronic, which refers to long-term or recurrent kidney infections.The primary cause of acute pyelonephritis (APN) is bacterial infection, with Escherichia coli accounting for approximately 70-80% of cases. Other bacteria, such as Proteus,...
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...
The Micturition Reflex01:26

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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...
Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...

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Related Experiment Video

Updated: Jul 3, 2026

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

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Published on: October 12, 2017

Vesicoureteral reflux, a benign condition.

Mika Venhola, Matti Uhari

    Pediatric Nephrology (Berlin, Germany)
    |July 8, 2008
    PubMed
    Summary

    The link between urinary tract infections (UTIs) and vesicoureteral reflux (VUR) in children, and their impact on kidney health, is being questioned. Current evidence suggests treating VUR may not prevent long-term kidney damage.

    Area of Science:

    • Pediatric Nephrology
    • Urology
    • Infectious Diseases

    Background:

    • The traditional view links urinary tract infections (UTIs) and vesicoureteral reflux (VUR) to pyelonephritis, renal scarring, and later hypertension or end-stage renal disease (ESRD).
    • This has historically driven aggressive screening, monitoring, and treatment of VUR in children.

    Discussion:

    • Recent meta-analyses cast doubt on the ability of VUR treatment to prevent renal scarring or ESRD.
    • The causality between VUR and ESRD remains controversial, with abundant but confounding studies.
    • The natural resolution of VUR, its dynamic nature, and varying grades complicate its overall importance.

    Key Insights:

    • There is increasing doubt regarding the necessity of imaging all children with UTIs and treating VUR.

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  • Historical data indicates VUR is more prevalent, even in healthy children, than commonly believed.
  • The effectiveness of current VUR management strategies in preventing long-term renal sequelae is uncertain.
  • Outlook:

    • A critical re-evaluation of VUR management is needed, questioning when and what type of VUR warrants treatment.
    • Further research is essential to clarify the true impact of VUR on pediatric renal health and long-term outcomes.
    • The focus may shift towards more selective diagnostic and therapeutic approaches for VUR in children.