Marked Inflammatory Sequelae to Implantation of Biodegradable and Nonbiodegradable Polymers in Porcine Coronary Arteries
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Discussion
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Implication
Randomized trial investigates inflammatory responses from biodegradable and nonbiodegradable polymers in porcine coronary arteries, indicating unexpected biocompatibility issues.
Key Points
- This research aims to evaluate the biocompatibility and inflammatory responses of various synthetic polymers when implanted in coronary arteries.
- Experimental placement of five biodegradable and three nonbiodegradable polymers in porcine coronary arteries (2.5-3.0 mm diameter).
- Stent patency was assessed via angiography and microscopic examination four weeks post-implantation.
- Inflammatory responses were quantified by measuring the thickness of the tissue response.
- Biodegradable PCL, PHBV, and POE and nonbiodegradable PUR and SIL caused extensive inflammatory responses (thickness: 0.79 mm, 1.12 mm, 2.36 mm, 1.24 mm, and 1.43 mm, respectively).
- Milder inflammation was noted in biodegradable PGLA and PEO/PBTP (0.46 mm, 0.61 mm) and nonbiodegradable PETP (0.46 mm).
- Neointimal thickening was induced unexpectedly, illustrating limitations of in vitro tests.
Cite This Study
Giessen et al. (1996) studied this question.