A method for determining an intracellular volume ICV of a comprising the steps of patient: determining an intracellular electrical resistance rmix patient, obtain the intracellular volume ICV using rmix considering a cell of a first type of tejidocontribuye differently resistance electric rmix the intracellular volume ICV compared witha cell of a second type of tissue, wherein the first type of tissue is adipose tissue and the second type of tissue is lean tissue, determine an extracellular electrical resistance RE of the patient, wherein the total mass is determined M patient wherein the preparation is carried out by iteraciónutilizando normal starting value for the intracellular volume ICV, iteration comprising the siguientespasos: obtain extracellular water volume ECW patient using RE, obtain volume ECWEX ill-hydration and thus the mal-hydration mass MEX of pacienteutiliz ando the extracellular water volume ECW and the total mass M of the patient, obtaining the mass MLT compartment lean tissue from the patient using an equation based inthe mass of mal-hydration MEX patient, the total mass M of the patient, the intracellular volume constant ICVy proportionality ζLT and ζAT constant proportion relating the tissue masasde lean MLT and compartment adipose tissue MAT with corresponding components detejido lean and adipose tissue ICVLT and ICVAT intracellular volume ICV and equation siendoobtener mass MAT compartment human adipose tissue by subtracting the masasMLT and MEX of the total mass M, obtain the resistivity mixed ρmix from baseline for healthy subjects endependencia the proportion MAT / MLT, using resistivity mixed ρmix thus determined to obtain a new volumenintracelular value for ICV and repeat iteration until it is achieved CONVERGENCE ia sufficient.Un método para determinar un volumen intracelular ICV de un paciente comprendiendo los pasos de:determinar una resistencia eléctrica intracelular Rmix del paciente, obtener el volumen intracelular ICV utilizando
