Which of the following methods is not correctly matched?

NEET SS
#1

Which of the following methods is not correctly matched?

  1. Antipyrine for total body water

  2. Inulin for extracellular fluid

  3. Evans blue for plasma volume

  4. I125 albumin for blood volume

Explanation:

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

I125 labelled albumin is used for assessing plasma volume, not blood volume.