Stent

A stent is a small mesh tube that's used to treat narrow or weak arteries, for example, the coronary arteries which supply oxygen-rich blood to your heart. Doctors place stents in arteries as part of a procedure called percutaneous coronary intervention, or PCI, sometimes called angioplasty. In coronary arteries narrowed by the buildup of plaque the procedure opens the blockage and restores blood flow to the heart muscle. Doctors also may place a stent in weak arteries to improve blood flow and help

body. This started with self-expanding bare metal stents; however, these stents could eventually lead to restenosis of vessels. In the Gastrointestinal system in particular, these stents tend to migrate and are difficult to remove at a later date. Though stenting in the GI system with these methods initially treated the pathologies, they could lead to additional cost and stress to the patient later on. With the recent development of biodegradable stents, this problem could be eliminated. With the use

Fundamental Structures and Properties of Teflon and Its Applications in Industry 1. Introduction Polytetrafluoroethylene (PTFE) also known as Teflon is a thermoplastic polymer. It is formed by addition polymerization using the monomer tetrafluroethylene (TFE). Teflon is a strong, waxy and non-flammable resin which is used in many applications especially in corrosive industries due to its resistance to chemicals. In addition, it is able to maintain its physical properties over a wide range of

2014 1. a. Bare-metal stents (BMS) and drug eluding stents (DES) essentially have the same tube like structure and generally consist of the same metal alloy composition of the wires. However, unlike the bare metal stents (BMS), the drug eluting stents (DES) are coated with a polymer which holds and eludes a drug such as paclitaxel or sirolimus which aids in the inhibition of restenosis. http://en.wikipedia.org/wiki/Drug-eluting_stent b. “Off-label” use of drug eluding stents (DES) constitutes the

assessment of coronary stent patency or restenosis. However, imaging of coronary stents by multislice CT is more difficult than imaging of a native coronary artery. This is because of the presence of metal within the stents which can cause artifacts interfering with the interpretation of lumen patency. While the accuracy of stent lumen analysis was low or modest with 4- and 16-slice CT scanners, 64-slice CT (single-source and dual-source) scanners allow for more accurate stent visualization and characterization

(“Balloon Angioplasty and Stents”, 2015). Angioplasty involves using a balloon to compress the plaque against the arterial wall in order to clear the blockage, but there is debate as to which procedure is optimal in minimizing risk of complications after the procedure (“Balloon Angioplasty and Stents”, 2015). According to “Balloon Angioplasty and Stents” (2015) these two procedures often go hand in hand, in fact, “about 80% of patients who have balloon angioplasty will have a stent placed as well.” This

between LISA and clinical events (ST and MI), our results do not establish a cause and effect relationship. The two cohorts, LISA and control, were unbalanced on one or more characteristics in all included studies. For instance, LISA group had longer stents and more commonly associated with acute coronary syndrome as the indication for PCI in

Spectranetics was founded in 1984, they provide expert tools, training and support designed to help successfully manage every cardiac lead and to eradicate restenosis and amputation, saving time, money and, most importantly, lives. For my co-op my day to day responsibilities include performing daily testing for the new product at both the CA and MN site using new equipment currently in the MN site. I will be also helping to manage the flow of the Fremont, CA lab, reviewing of testing methods, witnessing

heart disease [1]. Stent installation is a much-chosen alternative because it does not require surgery, has a lower risk of complications, and faster installation and healing times than bypass, and is more effective at preventing restenosis [2]. Moreover, since it was first developed in the 1980s, there are more than 100 coronary stents that have been marketed and evaluated worldwide [3]. The total number of stent requests in 2012 in 3 major hospitals in Indonesia reaches 4000 stents [4], even according

Studies have demonstrated that IMAs whenever used for CABG are resistance to developing of atherosclerosis and lasts longer when compared with saphenous venous grafts. In addition to longer IMA patency, survival has been reported to be significantly higher in patients who received IMAs CABG compared with saphenous vein grafts [4,5,6]. Investigators believe IMAs have superior endothelium structural and functional features which result in striking ability to fight formation of thrombosis and atherosclerosis