基于流体动力学的模拟肺等温过程仿真及实验研究  

Research on temperature compensation system for lung simulator based on fluid dynamics

作　　者：陈倩[1] 严荣国[1] 葛斌[1] 曹海涛[1] 

机构地区：[1]上海理工大学医疗器械与食品学院,上海200093

出　　处：《生物医学工程与临床》2016年第2期119-122,共4页Biomedical Engineering and Clinical Medicine

基　　金：国家自然科学基金培育项目(14XPM10)

摘　　要：目的分别对婴幼儿和儿童模拟肺内部换热情况进行仿真分析,提出了一种能够精确模拟婴幼儿肺顺应性的模拟肺。方法基于玻意耳定律,利用流体力学分析软件Fluent为计算平台,假设等温系统内部换热介质为多孔介质,研究了对模拟肺充气之后其内部温度变化情况。实验测量了婴幼儿模拟肺在不同质量铜丝填充后的顺应性。结果通过仿真得出婴幼儿和儿童模拟肺等温系统所需要等温材料体积约为总体积的3.3%。实验结果验证了仿真的准确性,得出了婴幼儿肺顺应性约为10.08 m L/k Pa(1.008 m L/mbar)。结论该模拟肺精确顺应性的特征可以更好地帮助临床测试肺功能和呼吸机顺应性参数精度。Objective To simulate the internal heat exchange in lung simulator for infants and children, and propose a lung simulator for lung compliance simulation of infants. Method Based on Boyle＇s law, the study assumed that the heat transfer medium of temperature compensation was porous, and the temperature inside lung simulator was calculated by fluid dynamics analysis software Fluent. The lung compliance of infants under different weight of copper wire filling was also measured. Results The temperature compensation requirement volume in lung simulator for infants and children was about 3.3 % of the total volume. The experimental results verified the simulation accuracy, and compliance of lung simulator for infants was about 10.08 mL/kPa （1.008 ml/mbar）. Conclusion It is demonstrated that the accurate compliance of the lung simulator can provide help for the tests of lung function and ventilator compliance parameters in clinics.

关 键 词：顺应性 模拟肺 Fluent仿真 等温系统 

分 类 号：R318[医药卫生—生物医学工程] O35[医药卫生—基础医学]