نتایج جستجو برای: failure mechanical
تعداد نتایج: 592744 فیلتر نتایج به سال:
The non-invasive ventilation (NIV) is widespread in the clinical medicine and has attained meanwhile a high value in the clinical daily routine. The application of NIV reduces the length of ICU stay and hospitalization as well as mortality of patients with hypercapnic acute respiratory failure. Patients with acute respiratory failure in context of a cardiopulmonary edema should be treated in ad...
Nowadays, the use of synthetic grafts to bypass occluded arterial sections is common practice in clinics and hospitals. Success has been achieved in cases involving large diameter blood vessels. However, for arteries with a diameter less than 5 mm, the success rates for synthetic grafts have been low mainly due to intimal hyperplasia formation at anastomoses. The postulated reasons affecting gr...
Percutaneous mechanical thrombectomy (PMT) has been gaining acceptance as a preferred approach for the treatment of acute deep venous thrombosis (DVT). In addition to treating acute DVT and decreasing the risk of pulmonary embolism, it has been reported that direct extraction of the thrombus decreases the risk of post-thrombotic syndrome (PTS), the economic impact of managing which is reported ...
Various heterogeneous materials with multiple scales and multiple phases in the microstructure have been produced in the recent years. We consider a mechanical failure due to the initiation and propagation of cracks in places of high pore density in the microstructures. A multi–scale method based on the asymptotic homogenization theory together with the mesh superposition method (s-version of F...
PURPOSE To study clinical and mechanical factors that predispose to failure of interlocking nails. METHODS Between October 1996 and December 2002, 286 femoral fractures, 211 tibial fractures, and 47 humeral fractures were repaired using variously designed interlocking nails. Fracture pattern, level and site, nail size and type, weight bearing after nailing, and union status were reviewed afte...
During the last 20 years, the management of heart failure has significantly improved by means of new pharmacotherapies, more timely invasive treatments and device assisted therapies. Indeed, advances in mechanical support, namely with the development of more efficient left ventricular assist devices (LVAD), and the total artificial heart have reduced mortality and morbidity in patients with end...
Our understanding of the physical world has progressed hand in hand with our ability to observe it. For instance, computer tomography (CT) — which was originally developed for medical imaging — has been instrumental in the non-destructive testing of materials. In CT, a digital three-dimensional replica of the object under observation is reconstructed from hundreds or thousands of twodimensional...
INTRODUCTION Ligaments are composed of elastin and collagen fibers embedded in a matrix of water, proteoglycans, glycolipids and fibroblasts. Their main function is to guide and to restrain joint motion in order to maintain joint stability. The joint stability is seriously affected when ligament injuries, such as seconddegree and third-degree sprains, occur. The treatment and prevention of thes...
OPINION STATEMENT Both acute and chronic systolic heart failure can progress to an advanced phase, resulting in stage D heart failure and even cardiogenic shock. Despite significant progress in the treatment of systolic heart failure using medical and device therapies, this terminal phase continues to be prevalent and associated with unacceptably high morbidity and mortality. Given the inabilit...
A framework for planning and supervision of robotized assembly tasks is initially presented, with emphasis on failure recovery. The approach to the integration of services and the modeling of tasks, resources and environment is briefly described. A planning strategy and domain knowledge fo r nominal plan execution is presented. Through the use of machine learning techniques, the supervision arc...
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