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Related Concept Videos

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...
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...
Urinary Tract Calculi V: Nursing Management01:28

Urinary Tract Calculi V: Nursing Management

AssessmentSubjective Data: Obtain a detailed health history, including any recent or chronic urinary tract infections, periods of immobilization, previous episodes of renal calculi, and medical conditions such as gout, benign prostatic hyperplasia, or hyperparathyroidism. Review the medication history for drugs that may influence stone formation, including allopurinol, analgesics, loop diuretics, or thiazide diuretics. Document the use of long-term indwelling catheters and any past surgical...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...

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Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
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Published on: October 12, 2017

Severe congenital midureteral dilatation.

Juan C Prieto1, Miguel Castellan, Rafael Gosalbez

  • 1Division of Pediatric Urology, Department of Urology, Miami Children Hospital and Jackson Memorial Hospital, University of Miami, Miami, FL 33155, USA. jcprietos@hotmail.com

Journal of Pediatric Surgery
|January 9, 2007
PubMed
Summary

Congenital midureteral stricture, a rare cause of prenatal hydronephrosis, can present uniquely. Surgical excision and ureteroureterostomy effectively resolved severe ureteral dilatation and hydronephrosis in a pediatric case.

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Area of Science:

  • Pediatric Urology
  • Congenital Abnormalities
  • Surgical Innovation

Background:

  • Congenital midureteral stricture is a rare cause of prenatal hydronephrosis.
  • Typically presents with proximal hydroureteronephrosis.
  • This case presents a unique variant with midureteral dilatation.

Observation:

  • A neonate presented with severe left-sided hydronephrosis and hydroureter.
  • Imaging revealed a congenital severe midureteral dilatation with mild proximal ureteral dilatation.
  • The distal ureter diameter was normal.

Findings:

  • Surgical excision of the dilated midureter was performed.
  • An open end-to-end ureteroureterostomy was the chosen surgical correction.
  • Post-operative follow-up at 6 months showed significant improvement.

Implications:

  • This case highlights a unique presentation of congenital midureteral stricture.
  • Open end-to-end ureteroureterostomy is an effective treatment for this condition.
  • Successful surgical correction can lead to complete resolution of hydronephrosis and hydroureter.