Strut dimensionDiameter ,0.1mm.22Physical characteristicsCylindrical braided mesh design consisting of 24 wires(fig 14).There are also two available mesh angles (. 140oand , 120o) that affec tradial force strength and the extentof foreshortening.43Stent materialPlatinum inner core covered with acobalt based alloy layer.15Potential complicationsDifficulties in precise positioning as a result of foreshorteningof up to 20% on expansion.27In addition,the mesh designisknown to cause side branch entrapment.15Because of the selfexpanding design,there is a chronic radial pressure exertedon the vessel walls that can exacerbate neointima prolifera-tion.It has been stated that this proliferation is balanced bypost-procedural stent expansion.10Figure 14 Wallstent by BostonScientific. Original image takenfrom website(http://www.geocities.co.jp/HeartLand-Sumire/6231/gfx.htmS).
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