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A resorbable bicomponent braided ureteral stent with improved mechanical performance.

Ting Zou1, Lu Wang1, Wenchao Li1

  • 1Key Laboratory of Textile Science and Technology of Ministry of Education and College of Textiles, Donghua University, China.

Journal of the Mechanical Behavior of Biomedical Materials
|July 6, 2014
PubMed
Summary

This study optimized bioresorbable ureteral stents using braiding and thermal treatment. Stent C demonstrated superior mechanical properties, offering a promising alternative to traditional stents.

Keywords:
BicomponentBioresorbable ureteral stentBraidedMechanical propertiesPGAPLGA

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Area of Science:

  • Biomaterials Science
  • Medical Device Engineering
  • Polymer Science

Background:

  • Bioresorbable ureteral stents eliminate removal surgery but face limitations in mechanical performance and resorption control.
  • Current prototypes require optimization for clinical viability.

Purpose of the Study:

  • To fabricate and characterize novel bioresorbable ureteral stents with enhanced mechanical properties.
  • To investigate the structure-property relationships of bicomponent stents made from poly (glycolic acid) (PGA) and poly (lactic-co-glycolic acid) (PLGA).

Main Methods:

  • Fabrication of five bicomponent stent prototypes using braiding and thermal treatment processes.
  • Optimization of mechanical properties by varying braided structure and resorbable yarn composition (PGA and PLGA).
  • Characterization using morphology, compression resistance, recovery, and tensile strength tests.

Main Results:

  • Successfully created bicomponent stents with controlled distributions of braided yarn and polymer film.
  • Demonstrated that the relative coverage of braided yarn to polymer film significantly influences mechanical performance.
  • Stent C exhibited optimal compression, recovery, and tensile properties, indicating superior mechanical performance.

Conclusions:

  • The combination of braiding and thermal treatment allows for precise control over the structure and properties of bioresorbable ureteral stents.
  • Tailoring the braided structure and material composition is crucial for achieving desired mechanical performance.
  • Stent C represents a highly promising design for advanced bioresorbable ureteral stents.