Browsing by Author "Eken, Emir Gökberk"

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    Design of left ventricle for cardiovascular system mock circuit
    (Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-01) Eken, Emir Gökberk; Sezer, M. Erol
    Heart disease is founded as the highest cause of death in the world. These loses can reduce by improving heart valves, ventricular assist devices (VADs), total artificial hearts, heart and lung machines etc. All these medical devices have to be tested on cardiovascular mock circuits (CVMCs) before starting clinical testing. At 1975 Donovan et al. designed and built a complete mock circulation for testing artificial hearts but, atria or ventricles wasn’t include to system. This CVMC has been the basis for many. Timms et al. (2010) designed and constructed a CVMC which includes both systemic and pulmonary circulatory systems. They accomplished to produce left ventricular pressure but, they couldn’t prevent lagging in aortic pressure. Aortic valves opening and closing times or wrong resistance values may cause this problem. For prevent this problem more accurate heart valves may use and resistance may optimize with feed-back control of proportional control valves. Objective in this study was to design and build CVMC which is drivable with an elastance based feed-back control for simulate heart functions in various conditions. CVMC virtually designed by using Solidworks based on results which are obtained in the Simulink model. Pressure and flow inputs and check valve outputs are implemented into system by using dSPACE control card. CVMC operated successfully with compressed air and check valves. However, results are indicated a leaking problem of heart valves.