生物电阻抗测量技术.pdf

田国医疗器械信息 2004年第10卷第1期 V N Jan 2004 CHINA MEDICAL DEVlCE INFORMATION■内容提要以人体组织的阻抗特性为基础,阐明了简化模型,血液电阻率,细胞膜容抗以及呼吸干扰等对血流图测量准确性和重复性的影响;比较了采用全身测量、分段测量和多频率方法行人体成分分析(BIA)测量时的优缺点;提出采用阻抗测量建立有效的胃动力学评价方法;展现了代表生物阻抗测量技术发展方向的电阻抗断层成像技术(EIT)的诱人应用前景。关键词电阻抗测量阻抗血流图人体成分分析胃动力电阻抗断层成像中图分类号R31 文献标识码:A Electrical Bioimpedance MeasuremEnt Technologg REN (Institute ofBiomedical Engineering,Chinese Academy ofMedica Sciences&Peking Union Medical College,Tianjin 300192) A032“。’:Based on thetissueimpedance property ofhuman body,the influences ofsimplified model,blood resistivity,cell reactance and breathdisturb on veracity and repeatability ofimpedance rheogram measurement have been anddisadvantages ofbioelectricalimpedance analysis using whole body,subsection body, multi-frequency measurements have effectiveevaluating method ofgastricmotility adopting impedance measurement hasbeen captivating application respects ofElectricalImpedance Tomography,it represents thedevelopment orientation ofimpedance bioelectricalmeasurement,has been reveaIed. Key words:impedance bioelectricalmeasurement,impedance rheogram,bioelectrical impedance analysis,gastric motility electricalimpedance tomography l引言生物电阻抗测量(Elect ricaI BioimPedance Measurement),或简称阻抗技术,是一种利用生物组织与器官的电特性及其变化规律提取与人体生理、病理状况相关的生物医学信息的检测技术。它通常是借助置于体表的电极系统向检测对象送入一微小的交流测量电流或电压,检测相应的电阻抗及其变化,然后根据不同的应用目的,获取相关的生理和病