Measurement of Human Body Water Content Using Single Frequency Bioelectrical Impedance Analysis

• Main Authors: Kuen-Ting Chen, 陳坤廷
• Other Authors: Kang-Ping Lin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/64920166455915592031

碩士 === 中原大學 === 通訊工程碩士學位學程 === 101 === The purpose of this research was to study the way to monitor the change of patients’ body fluid hoping to assist treatments and prognosis of many diseases. Clinically, there are many methods to evaluate the condition of body fluid. Among various body water content indicators of clinical human body composition estimations, bioelectrical impedance analysis is non-invasive, accurate, and the simplest and fastest. In this study, biological impedance analysis was used to develop a simple system to measure the condition of total body water content and heart rate. The results of measuring both hand backs and insteps were also compared with of which from a commercial body fat monitor. Moreover, the results of thorax impedance change were compared with Electrocardiography (ECG) and Photoplethysmography (PPG). The total body water contents acquired from measuring both hand backs and insteps after water intake decreased first but increased after a period of time. The correlation coefficients of the total body water content measuring system and the commercial body fat monitor were 0.87 and 0.92. In the comparison of heart rate analysis results of thorax impedance change and ECG, the correlation coefficient was 0.9263. The preliminary results have proved the feasibility of the proposed system in measuring total body water content and Heart rate parameters. In the future, it is expected that miniaturized circuits and more accurate small signal analysis are developed to analyze different parameters to achieve the ability in prevention and control.