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Designing Functional Fabrics for Today’s Heart Valves and Beyond
2/4/2013
Heart valve disease affects nearly 5 million Americans, a figure that is expected to double in the next 25 years. The most advanced of these cases require heart valve surgery. Prosthetic heart valves are designed to...
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Comparison of Optical and SEM-BEI Inclusion Analyses of VIM-VAR Nickel-Titanium Alloy
12/5/2012
The ASTM Standard for NiTi alloys does not specify the method to be used for the analysis of inclusions. Quantitative analysis is generally done by optical metallography with a computer program to measure size and area...
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Biomedical Textiles Advance Development of Orthopedic Implants
12/2/2010
This whitepaper discusses the changing demographics of orthopedic patients, the versatility of biomedical fabrics and the advances in implantable biomaterial textile technologies in the development of ...
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The Role of Material Selection in Biomedical Textile Device Design
8/17/2010
Biomedical textile structures are increasingly prevalent as critical components in a broad range of medical devices. Device designers are challenged in exploring material selection in component design, optimizing the...
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Finite Element Analysis on Nitinol Medical Applications
7/19/2010
This article presents two applications of the nonlinear finite element analysis (FEA) using ABAQUS/Standard with a user developed material subroutine Nitinol UMAT from Abaqus West. The analyses...
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An Overview of Superelastic Stent Design
7/19/2010
This paper summarizes the key differences between self-expanding and balloon expanding stents, highlighting the advantages of Nitinol. Also summarized are many novel concepts and future...
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Optimization of Processing and Properties of Medical-Grade Nitinol Wire
7/19/2010
The purpose of this paper is to review the current processing and resultant properties of standard Nitinol wire for guidewire applicalions. Optimized Ti-50.8Ni (at.%) wire is manufactured according to industry standards...
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Forming Nitinol - A Challenge
7/19/2010
Nickel-Titanium intermetallic compounds. commonly known as Nitinol alioys. exhibit the phenomena of thermal shape memory as well as superelasticity. The forming of parts from Nitinol requires a good understanding of the...
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SMA - Smart Materials for Medical Applications
7/19/2010
The paper presents Nitinol, a Nickel-Titanium shape memory alloy, as a smart material for medical implants and devices. The atomistic nature of shape memory and superelasticity of Nitinol and the associated unique...
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Oxidation of Nitinol and Its Effect on Corrosion Resistance
7/19/2010
This study explores the phase transformations of oxide formation in NiTi and its effects on corrosion resistance. Electropolished Ni-50.8 at% Ti wires were heat treated between 400 and 1000°C for 3 to 300 minutes in...
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Structural and Diffusional Effects of Hydrogen in TiNi
7/19/2010
Hydrogen can be inadvertently added to Nitinol medical devices through electropolishing, caustic cleaning, or exposure to other acidic or basic solutions. Moderately high hydrogen concentrations can lead...
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The Future of Woven Biomedical Textiles in Next-Generation Devices
6/3/2010
One of the most interesting trends in medical device development is the rapid growth of woven biomedical textiles for use in key device components. As the pace of innovation in the device industry accelerates, engineers...
