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Related Experiment Videos

Spontaneous ureteral stent fragmentation

A Zisman1, Y I Siegel, A Siegmann

  • 1Department of Urology, Assaf-Harofeh Medical Center, Tel-Aviv University, Haifa, Israel.

The Journal of Urology
|March 1, 1995
PubMed
Summary
This summary is machine-generated.

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Spontaneously fracturing ureteral stents showed significantly reduced tensile elongation, indicating accelerated aging. Fractures occurred at side holes, suggesting material defects influence stent failure and quality refinement.

Area of Science:

  • Urology
  • Biomaterials Science
  • Materials Engineering

Background:

  • Ureteral stents are crucial for urinary tract drainage.
  • Stent fragmentation poses clinical challenges and necessitates material integrity assessment.

Observation:

  • Multiple spontaneous fragmentations of ureteral stents were observed.
  • Retrieved stent fragments and new stents underwent physical and electron microscopy analysis.
  • Moderate encrustation was noted on the retrieved catheters.

Findings:

  • Tensile elongation was dramatically decreased in retrieved stents, signifying accelerated material aging.
  • Fractures consistently occurred exclusively through stent side holes.
  • Fragmented stents exhibited distinct electron microscopic features and altered physical properties.

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Implications:

  • The methodology allows for evaluating accelerated aging in stent materials.
  • Findings may guide the refinement of ureteral stent design and material quality.
  • Understanding fracture mechanisms can improve long-term stent performance and patient outcomes.