Majmaah University
Permanent URI for this collectionhttps://drepo.sdl.edu.sa/handle/20.500.14154/4263
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Item Restricted Intrinsic Investigation into Physiological Controllers for Cardiac Assist Devices(Saudi Digital Library, 2020) Al-Otaibi, Khalid Ghusayn Eid; Bakouri, Mohse; Smida, Amor AliHeart failure (HF) is a severe health condition characterized by the heart's inability to pump sufficient blood into the body. Currently, this disease effect 26 million persons. Amongst them, an estimated one million have a life expectancy of less than one year. This figure is increasing by 10% per year due to poor diet, low exercise, and increasing stress levels. In the US, 30.3 million adults were diagnosed with HF in 2018. Every year, about 647,000 Americans die from HF. Furthermore, cardiovascular disease treatment costs more than $351 billion per year. Due to a shortage of donors, hearts were supplying only 10% of patients' transplantation each year. And 75% of HF were caused by predominant left ventricular failure. Therefore, left ventricular assist devices (LVAD) are increasing use for patients with chronic heart disease. This study aims to review and analyze the physiological and nonphysiological control systems used to conduct cardiac aids. Additionally, to determine continuous flow timing for rotary blood pumps. Using the left ventricular assist device (LVAD), this research analyzed who the tool helps the patient pump enough blood to the body. Following the LVAD, a cardiovascular system (CVS) model has developed to simulate a broad range of cardiovascular and pump operating conditions. A range of simulation results for the LVAD device has been demonstrated. The intrinsic evaluation of physiological and non-physiological controls was practically illustrated in this work. The study concludes that the term pulsatility is caused by a changing rotary blood pump impeller speed. This, in turn, affects the ventricular end-systolic volume associated with the aorta's pulse pressure, the expulsion fraction, and the stroke effects. Rotary blood pumps primarily have two significant clinical uses. One of them is to act as a therapeutic factor by supporting the heart. The second most important clinical application of the rotary blood. Pumps are to replace the natural heart. Centrifugal blood pumps are those out of all three blood pumps and have the highest preload sensitivity. They can efficiently decrease the risk associated with suction during isovolumetric relaxation. The relationship of the blood pump with the change in stroke volume has still not been thoroughly investigated. The sensitivity of the preload did not coincide with the gradient of the natural left heart. Thus it is essential to include some kind of speed control36 0