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Prototype stent: in vivo swine studies in the biliary system
1Department of Radiology, Ohio State University Medical Center, Columbus 43210, USA.
Journal of Vascular and Interventional Radiology : JVIR
|January 1, 1997
Summary
This study shows a new balloon-expandable stent is safe for biliary system implantation. The stent demonstrated minimal tissue reaction and remained patent in swine models over six months.
Area of Science:
- Gastroenterology
- Biomaterials Science
- Surgical Innovation
Background:
- Biliary obstruction requires effective stenting solutions.
- Metallic stents are common but can cause tissue reactions.
- A novel balloon-expandable stent requires biocompatibility assessment.
Purpose of the Study:
- To assess the safety and biocompatibility of a new balloon-expandable stent.
- Evaluate the stent's performance in the swine biliary system.
Main Methods:
- Implantation of 30 stents (4-12 mm diameter, 2-6 cm length) in 10 microswine bile ducts.
- Follow-up cholangiography at 2 and 6 months post-implantation.
- Histopathologic analysis of harvested stent specimens.
Main Results:
- 100% technical success rate for stent implantation.
- All stents remained patent at 2 and 6 months.
- Minimal epithelial hyperplasia observed between stent wires, without wire coverage.
Conclusions:
- The new balloon-expandable stent is safely implantable in the biliary system.
- The stent exhibits minimal tissue reaction compared to existing metallic stents.
- This suggests potential for improved outcomes in biliary interventions.