论文标题
体外主要动脉心血管模拟器,以生成用于内部模型验证的基准数据集
In-vitro Major Arterial Cardiovascular Simulator to generate Benchmark Data Sets for in-silico Model Validation
论文作者
论文摘要
需要更深入地了解常见的心血管疾病,例如狭窄,动脉瘤或动脉粥样硬化对循环机制的影响,以建立新的早期诊断方法。过去开发了不同类型的模拟器,以模拟通常基于计算模型的健康和病理状况,从而可以生成大型数据集。但是,由于计算模型通常缺乏现实世界数据的某些方面,因此使用硬件模拟器来缩小此差距并生成用于模型验证的数据。这项研究的目的是对硬件模拟器的开发和验证,以生成健康和病理状况的基准数据集。这项研究中的体外硬件模拟器包括主要的33个动脉,并由心室节点处产生参数化输入条件的心室辅助装置驱动。生理流动条件在内,包括心率,收缩/舒张压,外周耐药性和依从性在很大范围内可调节。在17+1个不同位置的压力波和流动波通过倒液体耐流体压力传感器和一个超声流传感器来测量,该超声传感器支持对测量数据进行详细分析。压力和流动波显示生理条件。此外,研究了促损伤程度和位置对血压和流动的影响。结果表明,随着预期的狭窄程度随着狭窄程度的增加而降低了跨性压力和流动。基准数据集可用于研究社区,目的是验证和比较不同类型的内部模型。
A deeper understanding of the influence of common cardiovascular diseases like stenosis, aneurysm or atherosclerosis on the circulatory mechanism is required, to establish new methods for early diagnosis. Different types of simulators were developed in the past to simulate healthy and pathological conditions of blood flow, often based on computational models, which allow to generate large data sets. However, since computational models often lack some aspects of real world data, hardware simulators are used to close this gap and generate data for model validation. The aim of this study is the development and validation of a hardware simulator to generate benchmark data sets of healthy and pathological conditions. The in-vitro hardware simulator in this study includes the major 33 arteries and is driven by a ventricular assist device generating a parametrised input condition at the heart node. Physiologic flow conditions including heart rate, systolic/diastolic pressure, peripheral resistance and compliance are adjustable in a wide range. The pressure and flow waves at 17+1 different locations are measured by inverted fluid resistant pressure transducers and one ultrasound flow transducer supporting a detailed analysis of the measurement data. The pressure and flow waves show physiological conditions. Furthermore, the influence of stenoses degree and location on blood pressure and flow was investigated. The results indicate decreasing translesional pressure and flow with increasing degree of stenosis, as expected. The benchmark data set is made available to the research community, with the purpose to validate and compare in-silico models of different type.