The intracellular fluid is the fluid contained within cells.
It differs from intracellular fluid (fluid within the cells) in that it generally has a high concentration of sodium and low concentration of potassium, while intracellular fluid is high in potassium and low in sodium.
Though changes in intracellular fluid volume occur in some diseases, especially when the potassium content of the body is affected, there is no easy way of detecting them.
This method can have some drawbacks, such as intracellular fluid leakage and local inflammations.
In contrast, the major cation of the intracellular fluid is potassium, and the major anions are proteins and organic phosphates.
Potassium is important for normal muscle and nerve responsiveness, heart rhythm, and, in particular, intracellular fluid pressure and balance.
Though body fluid is most readily apparent in the bloodstream, it is present, and in larger amounts, in the tissues, both between the cells (interstitial fluid) and within them (intracellular fluid).
Membrane ion-selective magnesium electrodes are commonly used to determine ionized magnesium concentration in blood serum and intracellular fluid by potentiometric clinical analyzers.
In addition, a higher viscosity of intracellular fluid results in lower critical wall shear stress for cell detachment, dramatically reducing cell detachment rate.
and the intracellular fluid, those components were also measured to determine 241Am activity.
TLC of extra- and intracellular fluid at 60 min of incubation showed the 18F-FDG ratio of extracellular fluid (release) was 92.6%, while that of intracellular fluid (hemolysis) was 4.7% (Fig. 2b).
