Stents are small tubes or tubular shaped meshes which are used to keep or rebuild the luminal size of passages in the human body like coronary arteries or the esophagus. They are most commonly used in the treatment of stenosis (narrowing of the blood vessels). Stents can be utilized as implants or in conjunction with an angioplasty (a technique for widening narrowed arteries). One of the most common complications when using stents is in-stent restenosis and stent loss. In-stent restenosis is the renarrowing of the implanted stent which occurs in ~ 30 % of all cases.<br><br> To prevent restenosis drug eluting stents have been developed. This has been a success to a certain extent, but a big problem of drug eluting stents are the late effects, such as increased risk of bleeding, acute intoxication and the formation of tumors <br><br> <strong>Technology</strong><br> This novel microstructured polymer stents are made of a shape memory polymer (e.g. polyurethane). Below body temperature the shape memory polymer stent has a compressed geometry (temporary form, see left figure). When heating the shape memory polymer stent on body temperature the stent turns into an uncompressed geometry (predefined permanent form, see right figure). <br><br>
firstname.lastname@example.org | TechnologieAllianz e.V.
Force constant adaptation of braided sleeving in the automated production of braided components
01.04.2015 | TechnologieAllianz e.V.
Ultrasonic sensor with adjustable protective cover for the dental approximal region
31.03.2015 | TechnologieAllianz e.V.
Spring is here and ectotherms, or animals dependent on external sources to raise their body temperature, are becoming more active. Recent studies have shown...
Glass-fronted office buildings are some of the biggest energy consumers, and regulating their temperature is a big job. Now a façade element developed by Fraunhofer researchers and designers for glass fronts is to reduce energy consumption by harnessing solar thermal energy. A demonstrator version will be on display at Hannover Messe.
In Germany, buildings account for almost 40 percent of all energy usage. Heating, cooling and ventilating homes, offices and public spaces is expensive – and...
Outstanding chemical, thermal and tribological properties predestine silicon carbide for the production of ceramic components of high volume. A novel method now overcomes the procedural and technical limitations of conventional design methods for the production of components with large differences in wall thickness and demanding undercuts.
Extremely hard as diamond, shrinking-free manufacturing, resistance to chemicals, wear and temperatures up to 1300 °C: Silicon carbide (SiSiC) bundles all...
In an experiment at the Department of Energy's SLAC National Accelerator Laboratory, scientists precisely measured the temperature and structure of aluminum as...
The IPH presents a solution at HANNOVER MESSE 2015 to make ship traffic more reliable while decreasing the maintenance costs at the same time. In cooperation with project partners, the research institute from Hannover, Germany, has developed a sensor system which continuously monitors the condition of the marine gearbox, thus preventing breakdowns. Special feature: the monitoring system works wirelessly and energy-autonomously. The required electrical power is generated where it is needed – directly at the sensor.
As well as cars need to be certified regularly (in Germany by the TÜV – Technical Inspection Association), ships need to be inspected – if the powertrain stops...
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