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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)...

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Related Experiment Video

Updated: Jul 7, 2026

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction
14:05

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

Published on: December 20, 2014

[Endoluminal therapy for bilateral malignant ureteric obstruction].

Yong-Da Liu1, Jian Yuan, Shun-Tan Huang

  • 1Department of Urology, Minimally Invasive Center, First Affiliated Hospital, Guangzhou Medical College, Guangzhou 510230, China. liuyongda.jinbi@163.com

Zhonghua Zhong Liu Za Zhi [Chinese Journal of Oncology]
|February 6, 2008
PubMed
Summary

Endourological techniques are safe and effective for malignant ureteric obstruction. Retrograde double-J stenting is recommended initially, with percutaneous nephrotomy or antegrade stenting for complex cases.

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Last Updated: Jul 7, 2026

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Published on: November 22, 2019

Area of Science:

  • Urology
  • Endourology
  • Oncology

Context:

  • Bilateral malignant ureteric obstruction presents a significant clinical challenge.
  • Endourological interventions offer minimally invasive treatment options.

Purpose:

  • To evaluate the efficacy and safety of endourological techniques for bilateral malignant ureteric obstruction.
  • To compare outcomes of retrograde double-J stenting, minimally invasive percutaneous nephrotomy (MPCN), and antegrade double-J stenting.

Summary:

  • Retrospective review of 70 cases (43 patients) treated with endourological methods.
  • Success rates: 50% retrograde stenting, 100% MPCN, 62.5% antegrade stenting.
  • Key challenges included identifying ureteric orifices, severe compression, and stent dislodgment.

Impact:

  • Endourological techniques are a viable treatment for malignant ureteric obstruction.
  • Initial retrograde double-J stenting is suggested, with MPCN or antegrade stenting as alternatives for specific anatomical challenges.
  • This study informs procedural selection based on imaging findings and obstruction characteristics.