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Showing 1 to 7 of 7 for “"mechanical heart valve"”.
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Konzipierung und Validierung einer Polymer-Keramik-Lagerung für eine zweiflügelige mechanische Herzklappenprothese
Implantation of artificial valves is a safe and routine clinical procedure since more than 30 years and leads to an increased quality of life and life expectancy compared to untreated patients. Worldwide approximately 225.000 artificial heart valves are implanted annually. Nowadays implanted …
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3-DIMENSIONAL NUMERICAL AND EXPERIMENTAL STUDIES TO MODEL ARTIFICIAL HEART VALVES HEMODYNAMICS
The characterization of the artificial heart valves flow fields is a crucial step to evaluate the performances on improving heart valve engineering. With the advancement of Computational Fluid Dynamics, we are able to study the complex hemodynamics in details such as stagnation, recirculation zones …
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Quantitative Analyse klappeninduzierter Mikroembolien mittels Doppler-Sonographie in vitro für gängige Herzklappenprothesen
Patients with mechanical heart valve prostheses show significantly enhanced numbers of HITS detectet by transcranial Doppler- ultrasound. In order to assess the origin of HITS formation an in vitro study was carried out to quantify valve induced gaseous microemboli for mechanical and bioprosthetic …
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A Comparative In Vitro Study of the Flow Characteristics Distal to Mechanical and Natural Mitral Valves
Mechanical heart valve (MHV) flows are characterized by high shear stress, regions of recirculation, and high levels of turbulent fluctuations. It is well known that these flow conditions are hostile to blood constituents, which could lead to thromboembolism. In the ongoing effort to reduce …
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A Novel Multiblock Immersed Boundary Method Enabling High Order Large Eddy Simulation Of Pathological And Medical Device Hemodynamics
… device performance such as stent grafts and mechanical heart valves. Previous studies indicate the presence of highly disturbed, transitional and mildly turbulent flow in healthy and pathological arteries. Accurate simulation of the transitional flow requires high order numerics together with …
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Application of passive flow control to mitigate the thromboembolic potential of bileaflet mechanical heart valves: an in-vitro study
Implantation of a bileaflet mechanical heart valve (BMHV) continues to be associated with risk of thromboembolic complications despite anti-coagulation therapy. Mechanical heart valves have been the gold standard in valve heart replacement since the 1950s with BMHVs currently still being the valve …
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The design and prototyping of a Transcatheter Aortic Valve Implantation training system specific for aortic valve regurgitation.
Aortic regurgitation (AR) caused by rheumatic heart disease is a significant cause of mortality in developing countries. The replacement of the regurgitant aortic valve was historically performed by surgical insertion of a bioprosthetic or mechanical heart valve. Transcatheter Aortic Valve …