Electrical Impedance Signal Analysis for Medical Diagnosis

Electrical bioimpedance (EBI) depends on physical, biological, or chemical characteristics of the biological sample. EBI measurements provide an alternative to observe in human and nonhuman subjects the following aspects: special features, biological changes compared with controls, different stages, changes in time, or any other issue to establish identification or association with a disease condition, stage, or evolution. Many researchers have addressed this relationship, with a huge amount of possibilities, for example, in body composition, skin and breast tumor/cancer, kidney problems, edema, in the quality and quantity of muscle/fat/water, in the case of lung function/condition, gastric motility, knee injuries, etc. How safe, accurate, sensitive, and specific are these alternatives in medical diagnosis is the subject of this chapter.