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Design and evaluation of a hybrid mock circulatory loop for total artificial heart testing

机译:用于全人工心脏测试的混合模拟循环回路的设计和评估

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Aims: A hybrid mock circulatory loop (MCL) was developed for total artificial heart (TAH) performance evaluation. The hybrid MCL consists of hydraulic hardware components and a software computer model. Design: The hydraulic components are divided into the systemic and pulmonary circulation, each of which includes electrically controlled compliances, resistors, and a venous volume which can be adjusted for a wide range of physiological and pathological conditions. The software model simulates the baroreflex autoregulatory response by automatically adjusting the hydraulic parameters according to changes of condition in the MCL. Results: The experimental results demonstrated a good representation of the human cardiovascular system and the capability of real-time variation of physiological and pathological conditions. The functionality of the baroreflex autoregulatory mechanism was evaluated by simulation of a postural change. Conclusions: The hybrid MCL that we developed allows variable and continuous in vitro evaluation of mechanical circulatory support devices in TAH configuration and particularly their control algorithms in response to various cardiovascular conditions. The system has been built in a modular configuration to allow testing of different types of devices and thus provides a valuable test platform prior to animal experiments.
机译:目的:开发了一种混合模拟循环循环系统(MCL),用于总人造心脏(TAH)性能评估。混合MCL由液压硬件组件和软件计算机模型组成。设计:液压组件分为全身循环和肺循环,每个组件都包括电控顺应性,电阻器和静脉容积,可以针对各种生理和病理状况进行调节。该软件模型通过根据MCL中的条件变化自动调节液压参数来模拟压力反射自动调节响应。结果:实验结果证明了人体心血管系统的良好表现以及生理和病理状况实时变化的能力。压力反射自动调节机制的功能是通过模拟姿势变化来评估的。结论:我们开发的混合MCL可以对TAH配置的机械循环支持设备进行可变,连续的体外评估,尤其是针对各种心血管疾病的控制算法。该系统以模块化配置构建,可以测试不同类型的设备,从而在动物实验之前提供了有价值的测试平台。

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