Inulin is used for the measurement of-
Correct Answer: ECF
Description: Ans. is 'a' i.e., ECF * The volume of the various body compartments can be measured by injecting into them an indicator substance (marker or dye) and estimating its volume of distribution.* Measurement of body fluid volumes is done by 'Dilution method' i.e., by knowing the diluted concentration of dye in the fluid. Suppose 5 gm of dye is added to a beaker containing unknown volume of water. After equilibrium, if the marker concentration in water is lg/100 ml, the waterin the beaker can calculated as follows : Volume of water =Total amount of marker--------------------Concentration of marker in water=5g-----1g/100 ml= 500 ml Volume of fluid =Total amount of marker injected------------------------------Concentration of marker in the fluid, to be measured* Most of the fluid are calculated directly by dilution method, except for intracellular fluid (ICF) and interstitial fluid. Both these are calculated indirectly by calculating other body fluids.ICF = Total body water volume - ECF volumeInterstitial fluid = ECF volume - Plasma volume* Dyes used for various fluid volume measurement are : -Fluid volumeDye/indicator usedTotal body water (TBW) volumeDeuterium oxide: D2O (most commonly used), tritium oxide (3H2O), Aminopyrine, AntipyrineExtracellular fluid (ECF) volumeInulin (most accurate), Sucrose, Mannitol, Sodium thiosulfate, Na22, I125- iothalamatePlasma volume (PV)Evans Blue (T-1824), Serum albumin labeled with radioactive iodine(I125)Blood cell volumeCr51 labeled RBC
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now