Felipe-Andrés Bello-Robles , Manuel Villalobos-Cid , Max Chacón , Mario Inostroza-Ponta
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引用次数: 0
摘要
目的：根据动脉血压（ABP）和脑血流量（CF）的自发波动，动态脑自动调节（dCA）通过不同的方法来区分正常和受损状态。本研究提出了一种新颖的多目标优化（MO）方法，用于寻找脑血管阻力-顺应性模型的良好配置：方法：使用了 29 名受试者在正常和高碳酸血症（5% CO2 空气）条件下的数据。使用 MO 方法拟合了以 ABP 为输入、CF 速度为输出的脑血管阻力和血管顺应性模型，并考虑了拟合皮尔逊相关性和误差：结果：MO 方法比单目标（SO）方法找到了更好的模型配置，尤其是在高碳酸血症条件下。此外，多目标方法的帕累托-极值前沿为 dCA 提供了新的信息，反映了肌源性机制在解释 dCA 损伤方面的更大贡献。
A multi-objective optimisation approach for the linear modelling of cerebral autoregulation system
Objective:
Dynamic cerebral autoregulation (dCA) has been addressed through different approaches for discriminating between normal and impaired conditions based on spontaneous fluctuations in arterial blood pressure (ABP) and cerebral blood flow (CF). This work presents a novel multi-objective optimisation (MO) approach for finding good configurations of a cerebrovascular resistance-compliance model.
Methods:
Data from twenty-nine subjects under normo and hypercapnic (5% CO in air) conditions was used. Cerebrovascular resistance and vessel compliance models with ABP as input and CF velocity as output were fitted using a MO approach, considering fitting Pearson’s correlation and error.
Results:
MO approach finds better model configurations than the single-objective (SO) approach, especially for hypercapnic conditions. In addition, the Pareto-optimal front from the multi-objective approach enables new information on dCA, reflecting a higher contribution of myogenic mechanism for explaining dCA impairment.
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