A Survey on Various Total Body Water Detection Techniques to Develop a Wearable Device

The World Health Organization has defined dehydration as the condition that results from excessive loss of body water. A 3–4% decline in total body water (TBW) can be endured by individuals, and 5–8% abatement causes exhaustion and dizziness. A 10% loss of TBW causes physical and mental deterioration. A loss between 15 and 25% leads to death. Hence, regular monitoring of TBW is vital. In physiology, TBW is the water contained in the tissues, blood and bones of an organism. TBW in humans is largely altered by dehydration. The precise estimation of TBW requires complex techniques that are not effectively material to the clinical setting. Therefore, a few strategies are utilized by clinicians and scientists for assessment. Involving little research, these methodologies require vast setups and high investments. In this paper, authors aim to analyze different non-invasive techniques to compute TBW of a human being and to suggest the most feasible technique among them.