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A bioelectrical impedance phase angle measuring system for assessment of nutritional status

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 3rd International Conference on Biomedical Engineering and Biotechnology, 25–28 September 2014, Beijing, China

Article type: Research Article

Authors: Zhang, Guanghao | Huo, Xiaolin; | Wu, Changzhe | Zhang, Cheng | Duan, Zhongping

Affiliations: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, No. 6 Beiertiao, Zhongguancun, Beijing, China | Artificial Liver Center, Beijing You' an Hospital, Capital University of Medical Sceiences, No. 8, Xi Tou Tiao, Youanmen wai, Fengtai District, Beijing, China

Note: [] Corresponding author: Xiaolin Huo, Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, No. 6 Beiertiao, Zhongguancun, Beijing, China. Tel.: 86-10-82547242; Fax: 86-10-82547242; E-mail: huoxl@mail.iee.ac.cn.

Keywords: Phase angle, bioelectrical impedance, nutritional status

DOI: 10.3233/BME-141193

Journal: Bio-Medical Materials and Engineering, vol. 24, no. 6, pp. 3657-3664, 2014

Published: 2014
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Abstract

Bioelectrical impedance phase angle has been recommended as a tool to assess nutrition state, but there are no measuring devices have been specially designed for hospital residents. In this study, a system was established for the measurement of bioelectrical impedance phase angle. The electrical composition, calculation method and measuring method of this system are presented in this paper. Experiments showed excellent performance of this system in measuring impedance made of resistors and capacitors. The designed system was also used to measure the bioelectrical impedance phase angle of both healthy subjects and patients with malnutrition, and the results demonstrated that the phase angle of patients with malnutrition is lower than that of healthy subjects (P < 0.01 for male and P < 0.05 for female). These results suggest that phase angle has the potential to be a useful tool for the quantitative assessment of nutritional status.

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