An intelligent control strategy for high-flow nasal cannula based on electrical impedance tomography.

IF 1.7 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Tian Peng, Guojun Li, Zhiwei Li, Yang Wu, Kai Liu, Jiafeng Yao
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引用次数: 0

Abstract

To improve the precision and adaptability of oxygen delivery in patients with chronic obstructive pulmonary disease, this study proposes an intelligent control method for high-flow nasal cannula (HFNC) based on Electrical Impedance Tomography (EIT). First, an equivalent circuit model of the HFNC-respiratory system was constructed to represent the physiological dynamics of airflow and muscle effort, and its validity was confirmed through physical experiments. Second, a dual closed-loop control architecture was developed, incorporating real-time EIT-derived ventilation information as the outer-loop feedback and flow rate as the inner-loop control target. The system was implemented using both conventional proportional-integral-derivative (PID) and fuzzy PID algorithms. Finally, a simulated lung platform equipped with EIT monitoring was built to experimentally evaluate the flow tracking performance. The results show that the fuzzy PID controller significantly improves control accuracy and stability, reducing the flow error by 46.1% and fluctuation by 69.1% under high-flow conditions compared to conventional PID. The proposed strategy presents a dynamic, individualized approach to respiratory support, demonstrating promise for advancing precision oxygen therapy in clinical settings.

基于电阻抗断层成像的高流量鼻插管智能控制策略。
为提高慢性阻塞性肺疾病患者供氧的精准性和适应性,本研究提出了一种基于电阻抗断层扫描(EIT)的高流量鼻插管(HFNC)智能控制方法。首先,构建hfnc -呼吸系统等效电路模型,表征气流和肌肉用力的生理动力学,并通过物理实验验证其有效性。其次,建立了一种双闭环控制体系结构,将实时eit导出的通风信息作为外环反馈,将流量作为内环控制目标。该系统采用传统的比例-积分-导数(PID)算法和模糊PID算法实现。最后,搭建了一个配备EIT监测的模拟肺平台,对其血流跟踪性能进行了实验评估。结果表明,与传统PID相比,模糊PID控制器显著提高了控制精度和稳定性,在大流量工况下,流量误差减小46.1%,波动减小69.1%。提出的策略提出了一种动态的,个性化的呼吸支持方法,展示了在临床环境中推进精确氧治疗的希望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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