Abstract
Purpose: To investigate the neointimal response to poly(organo)phosphazene- and amphiphilic polyurethane-coated, oversized, stainless steel stents implanted in porcine peripheral arteries.
Methods: Nonarticulated, stainless steel, slotted-tube stents were coated with 1) a biodegradable poly(organo)phosphazene with aminoacid ester side groups and 2) a biostable polyurethane prepared from an amphiphilic polyether, diphenyl methane-4,4'-diisocyanate and butane diol as chain extender. The stents were deployed in porcine peripheral arteries using an oversized balloon.
Results: The neointimal response to amphiphilic polyurethane-coated stents was similar to the uncoated metallic stents. Poly(organo)phosphazene-coated stents, however, induced a severe histiolymphocytic and fibromuscular reaction resembling a foreign body reaction.
Conclusions: Amphiphilic polyurethane is very promising as a biocompatible stent coating. Poly(organo)phosphazene, however, appears unsuitable for this purpose.
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De Scheerder, I.K., Wilczek, K.L., Verbeken, E.V. et al. Biocompatibility of biodegradable and nonbiodegradable polymer-coated stents implanted in porcine peripheral arteries. Cardiovasc Intervent Radiol 18, 227–232 (1995). https://doi.org/10.1007/BF00239417
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DOI: https://doi.org/10.1007/BF00239417