Design and modeling balloon-expandable coronary stent for manufacturability

Abstract

Abstract. Coronary artery disease (CAD) is a disease that caused by narrowing of the coronary artery. The narrowing coronary artery is usually caused by cholesterol-containing deposit (plaque) which can cause a heart attack. CAD is the most common cause mortality in Indonesia. The commonly CAD treatment use the stent to opens or alleviate the narrowing coronary artery. In this study, the stent design is optimized for the manufacturability. Modeling is used to determine the free stent expansion due to applied pressure in the inner surface of the stent. The stress distribution, outer diameter change, and dogboning phenomena are investigated in the simulation. The result of modeling and simulating was analyzed and used to optimize the stent design before it is manufactured using EDM (Electric Discharge Machine) in the next research.

The Effect of EDM Process on the Microstructure of CP-Titanium Grade 2 and AISI 316 L in Cardiovascular Stent Manufacturing

“…It has a good ability to cut the conductive material without being affected by hardness, toughness, or melting point, and usually does not need subsequent finishing operation [1][2][3]. Currently, EDM has been widely used for manufacturing processes, such as gear [4][5], molding [6], microelectrode, micro hole [7], and cardiovascular stent [8][9]. The EDM utilizes an electric spark between electrode and workpiece that will cause a local melting of the workpiece [10].…”