基于EIT测定不同体姿下通气分布实验方法研究  

Study on Experimental Method of Measuring Ventilation Distribution under Different Position Based on Electrical Impedance Tomography

作　　者：方海东 骆栩潇 吴阳 周童[2] 高贵锋 刘凯[1] 姚佳烽 FANG Haidong;LUO Xuxiao;WU Yang;ZHOU Tong;GAO Guifeng;LIU Kai;YAO Jiafeng(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Respiratory and Critical Care Medicine,The Second Affiliated Hospital of Soochow University,Suzhou 215004,China;Shenzhen Ambulance Tetch Co.,Ltd.,Shenzhen 518100,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]苏州大学附属第二医院呼吸与危重症医学科,江苏苏州215004 [3]深圳市安保医疗科技股份有限公司,广东深圳518100

出　　处：《机械制造与自动化》2022年第5期252-256,共5页Machine Building & Automation

基　　金：国家自然科学基金面上项目(62071224);苏州市科技计划项目(SKY2021006)。

摘　　要：提出一种无线远程监控电阻抗成像(WTEIT)实验方法,对坐姿、俯卧和仰卧3种体姿下的通气分布进行测定,采用通气中心(CoV)、不均匀性(GI)、局部通气延迟(RVD)3种指标和RVD分布图对通气均匀程度进行评价。结果表明:俯卧时通气分布相比坐姿和仰卧更均匀。俯卧时,腹背侧通气占比为(57.54±7.89)%∶(42.46±7.89)%,最接近1∶1;CoV最大,为55.26±1.10,说明背侧通气最多;GI最小,为0.25±0.03;RVD最小,为5.01±1.43,说明通气最均匀。此研究用EIT方法反映了不同体姿下肺部通气的均匀程度,证明了俯卧位通气在临床上的有效性。A wireless telemonitoringelectrical impedance tomography(WTEIT) experimental method is proposed to measure the ventilation distribution under sitting, prone and supine positions. Center of ventilation(CoV), global inhomogeneity(GI), regional ventilation delay index(RVD) and RVD distribution map are used to evaluate the ventilation uniformity. The results show that the distribution of pulmonary ventilation under prone position is more uniform than that under sitting and supine positions. The proportion of ventral and dorsal ventilation under prone position is(57.54±7.89)%∶(42.46±7.89)%, closest to 1∶1. CoV is the largest with 55.26±1.10, indicating that dorsal ventilation is the most, while GI is the smallest with 0.25±0.03, and RVDis the smallest as 5.01±1.43, showing that the ventilation is the most uniform. This study reflects the uniformity of lung ventilation under different positions by EIT method and proves the clinical effectiveness of prone position ventilation.

关 键 词：电阻抗成像 体姿变化 通气分布 通气均匀性指标 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]