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Updated: May 29, 2026
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Design of a Biocompatible Drug-Eluting Tracheal Stent in Mice with Laryngotracheal Stenosis
Published on: January 21, 2020
Novel biodegradable polydioxanone stents in a rabbit airway model
Ladislav Novotny1, Michal Crha, Petr Rauser
1Institute of Pathology and Parasitology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.
The Journal of Thoracic and Cardiovascular Surgery
|September 3, 2011
Summary
This study shows a new biodegradable polydioxanone stent is safe and biocompatible in rabbits. The tracheal stent fully degraded within 10 weeks, offering a promising alternative for airway stenosis treatment.
Area of Science:
- Biomaterials Science
- Medical Devices
- Regenerative Medicine
Background:
- Metallic and silicone stents are standard for hollow organ stenosis but carry risks.
- Biodegradable stents offer a potential solution to reduce complications while maintaining lumen patency.
Purpose of the Study:
- To evaluate the safety and biocompatibility of a novel biodegradable polydioxanone stent.
- To assess the stent's performance in a rabbit tracheal model.
Main Methods:
- Self-expanding polydioxanone stents were manufactured from a commercially available suture.
- Stents were implanted bronchoscopically in 25 white rabbits under fluoroscopic guidance.
- Histopathological examinations were conducted at 3, 4, 5, 10, and 15 weeks post-implantation.
Main Results:
- No deaths or stent displacements occurred; animals remained in good condition.
- Tracheal lumen patency was maintained, with complete stent degradation by 10 weeks.
- Tracheal damage peaked at 5 weeks (epithelial necrosis) but resolved by 15 weeks.
Conclusions:
- The biodegradable polydioxanone stent demonstrated acceptable safety and biocompatibility in a rabbit airway model.
- Polydioxanone stenting is suggested for further clinical studies where complete degradation is desired.
