Abstract: 【Abstract】Overhydration is closely related to cardiac mortality and all- cause mortality in maintaining hemodialysis (MHD) patients. On the other hand, hypohydration may lead to hypotension-associated adverse events, decrease of residual renal function and even cardiac stunning. Thus, accurate management of body hydration is essential to the outcome of MHD patients. Clinical observation cannot be used for the objective and accurate assessment of body hydration status in MHD patients due to the unwarranted interference of many factors. Bioimpedance analysis (BIA) is accurate, non- invasive, convenient and inexpensive, becoming the most useful method for objective assessment of body hydration status in MHD patients. In this review, we summarize BIA for the management of blood pressure and hydration status as well as the effects of BIA on residual kidney function and long-term outcomes such as cardiovascular complications, hospitalization rate and mortality.

Key words: bioimpedance analysis, body hydration status, blood pressure, long-term outcome, maintaining hemodialysis