The Materials in a Stent Essay

1092 Words 5 Pages
There are many cases of death through heart disease, heart attack, and other heart related problems. To find a possible cure, or help, scientists have invented stents. Stents are spring like objects that expand outward to open a clotted area. Although stents were invented and helped heal a vessel, there still, however, were problems. It was then understood that more research should go into the development of stents. This paper talks about one of these research topics. Jared May, Milesh Joshi and Rajeev Nair (2012) agree that, “Stent material is also an important factor in determining a stent’s clinical success” (p.442). So a good topic would be a topic about materials. What materials are best for a stent? To find the best material for …show more content…
Nitinol as an allow that stands for Nickel-Titanium. It is corrosion resistant and is great at expanding. Today, nitinol stents can expand without any heat. According to Stoeckel et al. (2003) “Nitinol alloys exhibit a combination of properties which make these alloys particularly suited for self expanding stents” (p.1). Nitinol is also very elastic. It has a special ability for retaining its shape (Stockel, Pelton & Derig, 2003). Additionally, according to Levesque et al. (2004), “Nitinol owes its good corrosion resistance to passive surface fillings consisting mainly of TiO2” (p. 45). Nitinol, however, had problems of its own. It does not have great strength and capacity and it is not biodegradable (Jared May et al., 2012). There are other materials, however, that do have great radial strength. One of these materials is iron. Iron can be both biodegradable and even non biodegradable. The biodegradable iron stent, has good strength and high elasticity. Also Moravej and Montovani (2011) state, “Iron can interconvert between ferric (Fe2+) and ferrous (Fe3+) by accepting and donating electrons quite readily, which makes it an useful component for cytochromes, oxygen binding molecules and many enzymes” (p.4). Iron is also very ductile and this can help the implantation because stents can easily get deformed (Moravej & Mantovani, 2011). The biodegradable iron stents do however have problems. They

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