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Related Experiment Video

Updated: Nov 6, 2025

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction
06:37

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Does relative renal function improve after intervention for chronic ureteric obstruction?

Zhi-Yang Low1, Siân E Allen1, Vimoshan Arumuham1

  • 1Institute of Urology, University College London Hospitals NHS Foundation Trust, London, United Kingdom.

Central European Journal of Urology
|May 12, 2021
PubMed
Summary
This summary is machine-generated.

Intervention for ureteric obstruction does not significantly improve relative renal function (RRF). The primary goal should be maintaining existing kidney function and alleviating symptoms in patients with obstructive uropathy.

Keywords:
MAG3improvementobstructionrelativerenal function

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Area of Science:

  • Nephrology
  • Urology
  • Radiology

Background:

  • Chronic ureteric obstruction can lead to unilateral renal function decline.
  • Assessing changes in relative renal function (RRF) post-intervention is crucial for understanding outcomes.
  • Identifying factors influencing long-term renal function is essential for patient management.

Purpose of the Study:

  • To determine the change in RRF after intervention for unilateral ureteric obstruction using MAG3 renography.
  • To identify clinical and epidemiological factors affecting long-term outcomes after intervention.

Main Methods:

  • 228 patients with unilateral ureteric obstruction underwent MAG3 renography before and after intervention.
  • Patients were categorized by preoperative RRF: normal (43-57%), mild (29-42%), moderate (15-28%), and severe (<15%).
  • Demographics, obstructive uropathy type, and intervention were analyzed for their impact on RRF changes.

Main Results:

  • Overall, mean RRF of the obstructed kidney did not change significantly post-intervention (32.30% vs. 32.20%, P = 0.835).
  • Most patients remained in their preoperative RRF category (85.9% normal, 67.4% mild, 64.4% moderate, 73.3% severe).
  • Patients with mild preoperative RRF impairment showed a significant worsening postoperatively (P = 0.024); no other significant changes were observed.

Conclusions:

  • Intervention for ureteric obstruction does not lead to significant improvement in relative renal function.
  • The primary aim of intervention should focus on preserving existing renal function and symptom relief.
  • No significant association was found between intervention type, age, gender, or diagnosis and improved postoperative RRF.