Electrical Bioimpedance: Methods and Applications

Bio-electrical impedance analysis (BIA) is an inexpensive, quick and noninvasive technique for measuring body composition. Unlike other various complicated methods, bioimpedance measurement technique is simple and less time consuming for various applications including medicine, biotechnology and security system. BIA is a promising method for predicting changes in body composition and has the potential to replace the conventional methods of detection and diagnosis of diseases in near future. The results are reproducible and rapidly obtained. However it suffers from a lack of standardized methods and quality control procedures. This paper describes the theory and practical implementation of various methods to measure complex impedance of biological tissues. By reviewing the current development status of bioimpedance technology, the paper analyses the future emphasis of development and technology direction, in order to make bioimpedance technology gain wider clinical applications.