All of the following are used to measure ECF volume, excepta) Sucroseb) Sodium chloridec) Inulind) Heavy water: (A) c, (B) d, (C) ab, (D) bd
Answer is C. Indicators used for fluid volumes
1.       Total body water (TBW)- Deuterium Oxide D2O, Tritium oxide, Aminopyrine, Antipyrine
2.       ECF- Inulin, Sucrose, Mannitol, Sodium thiosulphate, Na22
3.       Plasma volume- Evan’s blue, radioactive iodine labelled serum albumin (I125)
 
4.       Blood cell volume- Cr51 labelled RBC