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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...
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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...
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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...
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Related Experiment Video

Updated: Dec 26, 2025

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction
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Intestinal interposition for complex ureteral reconstruction: A comprehensive review.

Shengwei Xiong1,2,3, Weijie Zhu1,2,3, Xinfei Li1,2,3

  • 1Department of Urology, Peking University First Hospital, Beijing, China.

International Journal of Urology : Official Journal of the Japanese Urological Association
|March 20, 2020
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Bowel interposition techniques effectively reconstruct long ureteral defects. Modified methods like the Yang-Monti ileal ureter replacement minimize complications, offering a promising solution for ureteral reconstruction.

Keywords:
antireflux techniqueappendixileumrenal functionureteral reconstruction

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Area of Science:

  • Urology
  • Surgical Reconstruction
  • Gastrointestinal Surgery

Background:

  • Long ureteral defects present significant surgical challenges.
  • Traditional bowel interposition methods carry risks like mucus obstruction and metabolic disorders.

Purpose of the Study:

  • To review and compare various intestinal segment techniques for complex ureteral reconstruction.
  • To highlight modified procedures that reduce complications associated with bowel interposition.

Main Methods:

  • Review of literature on bowel interposition for ureteral defects.
  • Analysis of modified techniques including Yang-Monti, tapering, and onlay flaps.
  • Evaluation of appendiceal and colon interposition methods.

Main Results:

  • Yang-Monti ileal ureter replacement is highly effective with reduced complications in select patients.
  • Appendiceal interposition is suitable for right ureteral defects.
  • Reconfigured colon segments offer a viable option for long defects with minimal complications and improved renal function.

Conclusions:

  • Modified bowel interposition techniques, especially the Yang-Monti procedure, significantly improve outcomes for ureteral reconstruction.
  • Antireflux anastomosis and distal nipple valve techniques enhance long-term success.
  • Intestinal segments provide effective solutions for complex ureteral defects.