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Related Concept Videos

Urinary Tract Calculi VI: Surgical Management01:25

Urinary Tract Calculi VI: Surgical Management

Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...
Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
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...
Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
Kidney Transplant II: Surgical Procedure01:26

Kidney Transplant II: Surgical Procedure

Preoperative ManagementThe primary goals of preoperative management in kidney transplantation are to optimize the patient’s metabolic state and prepare them for surgery through diet adjustments, necessary dialysis, and tailored medical treatment. This phase also involves comprehensive infection screening and patient education about the surgical procedure and postoperative care to improve outcomes and adherence.Medical ManagementA comprehensive evaluation is required for both the living donor...
Urologic Endoscopic Procedure: Cystoscopic Examination01:28

Urologic Endoscopic Procedure: Cystoscopic Examination

Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

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Related Experiment Video

Updated: May 11, 2026

Vessel-sparing Excision and Primary Anastomosis
08:09

Vessel-sparing Excision and Primary Anastomosis

Published on: January 7, 2019

[Primary obstructive megaureters: long-term follow-up].

L Hoquétis1, A Le Mandat, O Bouali

  • 1Département d'urologie, CHU de Rangueil, 1, avenue Jean-Poulhès, 31059 Toulouse cedex 9, France. lionel.hoquetis@gmail.com

Progres En Urologie : Journal De L'Association Francaise D'Urologie Et De La Societe Francaise D'Urologie
|June 1, 2013
PubMed
Summary
This summary is machine-generated.

Primary megaureters require careful monitoring, especially in boys and those with recurrent infections. An initial retrovesical ureter diameter exceeding 14 mm on ultrasound may indicate a need for intervention.

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A Mouse Model to Evaluate the Long-Term Structural and Functional Outcomes after the Reversal of Prolonged Unilateral Ureteric Obstruction
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A Mouse Model to Evaluate the Long-Term Structural and Functional Outcomes after the Reversal of Prolonged Unilateral Ureteric Obstruction

Published on: July 18, 2025

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Last Updated: May 11, 2026

Vessel-sparing Excision and Primary Anastomosis
08:09

Vessel-sparing Excision and Primary Anastomosis

Published on: January 7, 2019

A Mouse Model to Evaluate the Long-Term Structural and Functional Outcomes after the Reversal of Prolonged Unilateral Ureteric Obstruction
05:34

A Mouse Model to Evaluate the Long-Term Structural and Functional Outcomes after the Reversal of Prolonged Unilateral Ureteric Obstruction

Published on: July 18, 2025

Area of Science:

  • Pediatric Urology
  • Medical Imaging
  • Nephrology

Context:

  • Primary obstructive megaureters are a congenital condition affecting the ureter.
  • Early detection and management are crucial for preserving renal function.
  • Ultrasound plays a key role in diagnosing and monitoring megaureters.

Purpose:

  • To evaluate the clinical outcomes of primary megaureters.
  • To identify predictive factors for surgical intervention based on ultrasound measurements.
  • To assess the effectiveness of medical versus surgical management.

Summary:

  • This study analyzed 43 primary obstructive megaureters in 41 patients over a decade.
  • Surgical intervention was indicated for pyonephrosis, recurrent pyelonephritis, scintigraphic damage, ureteric diameter increase, or single kidney disease.
  • Post-surgery, ureteric diameter significantly decreased, while medical management showed variable outcomes, with some cases resolving and others progressing to renal damage.

Impact:

  • Provides evidence for careful monitoring of primary megaureters.
  • Highlights the significance of retrovesical ureter diameter (>14 mm) on initial ultrasound as a predictor for intervention.
  • Informs clinical decision-making for managing pediatric obstructive megaureters.