Fluid resuscitation is essential component of sepsis bundle, initial fluid resuscitation can increase the stroke volume and restore organ perfusion. However, excess fluid thereafter may damage vascular integrity leading to tissue demand organ dysfunction. Cumulative fluid balance (CFB) is total amount of fluid accumulates in body over a period of time. High CFB can increase time on mechanical ventilator, length of ICU stays and mortality.

There are various surrogate markers for CFB (e.g.-Daily weight, calculated fluid balance, clinical assessment of edema, skin turgor, lung edema, thirst, CVP) but its less subjective, poorly validated.

Bioimpedance analysis (BIA) along with calculated fluid balance, daily weight measurement will help in maintaining CFB. Calculated fluid balance is most easy, feasible and vastly used method. Intake -output calculation is considered as gold standard for CFB, but it doesn’t measure insensible loss. Daily weight measurement in ICU patient is tedious task, less precise. BIA measures electrical impedance by passing weak and small alternating current through body. It not only calculates total body water (TBW) but Intracellular weight (ICW) and Extracellular water (ECW) as well. Hence, the need to assess merit of BIA against the above parameters