Bare-metal stent

Some people ask what is MIG welding? Well I’m going to explain to you what MIG welding is. MIG welding is the process of combining two pieces of metal together into one piece. MIG welding is commonly known as Gas Metal Arc Welding or GMAW. MIG welding produces an electric arc between the filler wire and the pieces of metal. The electric arc heats the two metals, creating a puddle known as a weld puddle…

Brandon is sitting at his crowded office desk with stacks of papers in the corner, and his lunch out in front of him in Wichita, Kansa, staring out the window watching the wheat as it delicately flows in with the slight breeze. Breaking news just came on tv, a hurricane is about to hit Texas and devastate thousands of people. Brandon automatically starts racking his brain on what to do. Brandon thoughts are all over the place. Should he take that long drive and go down to help, or should he…

CORONARY STENTS Before stents were used, balloon angioplasty was used to treat narrowed coronary arteries. This involved inserting a very thin, long, balloon-tipped tube into an artery where there was a blockage. The balloon at the tip of the catheter was inflated to compress the blockage and restore blood flow. It was then deflated to remove the catheter and balloon but because no support was left at the site of the blockage, in some cases, the artery collapsed. This is why small stents were…

Implantation of a stent within a coronary artery alters the local hemodynamics modifying the shear stress upon the endothelium. 14 Low endothelial shear stress causes a phenotypic change in which can induce a phenotypic switch in the smooth muscle cells from contractile to secretory as well as increase migration into the intima and proliferation. 15 Overall, regular or high endothelial shear stress maintains the contractile phenotype of the smooth muscle cells therefore inhibiting neointimal…

of aharvested, “valved, bovine jugular vein sewn into a bare metal stent” (Kenny & Hijazi, 2013,p.795). It received regulatory approval in 2006 and since then, more than 7,000 implants within165 centers worldwide have been conducted (Ringewald & Suh, 2014).The Edwards SAPIENvalve is the alternative to the Melody and is made from “bovine pericardial leaflets sewn into aballoon expandable stent” (Singh, Olsten, & Horlick, 2012, p.207).The stents with which bothvalves are mounted are radiopaque and…

Demonstrate the role of stents in Percutaneous Coronary Intervention (coronary angioplasty) Introduction The heart is a pump that circulates blood to the rest of the human body. It is positioned at the centre of the chest, just between the lungs. The network of blood vessels that branch over the surface of the heart are the coronary arteries. Figure 1 outlines the coronary arteries on the heart which supply the cardiac muscles with nutrients such as oxygen and glucose needed to survive [1].…

vascular endothe¬lial growth factor encoding plasmid through liposomes, with the aim to prevent in-stent restenosis and postangioplasty but the treatment doomed to change the incidence of restenosis, while it was demonstrated that gene transfer using liposomes was a viable and well tolerated approach. In a different clinical trial paclitaxel nanoparticles fixed to albumin was used to prevent in-stent restenosis. Reports claimed that without major complication the treatment was well tolerated at…

infections, and immunological risks. However as we have seen with the advancement of other technologies it is expected that these issues will be resolved as more time, research, and money are invested into this product. For example a cardiac stent has gone from bare metal to drug-eluting lowering the mortality and morbidity of vascular…