Urgent IV solution question

  1. Am in the middle of studying for a test and read something that is causing me to draw a blank.

    Here it is

    This in reference to hypotonic solutions.

    0.45% Normal Saline The book says that is lowers the serum osmolality by moving body fluid from the blood vessels into the cells and interstitium.

    Here is my thought....if the fluid leaves the intravascular compartment, then doesn't that increase the serum osmolality because there is more solute per liter of fluid. Basically, a higher concentration in the vessels.

    Any help would be greatly appreciated.


  2. Visit mspringer profile page

    About mspringer

    Joined: Sep '02; Posts: 66; Likes: 1
    Student Nurse


  3. by   elusive
    It would increase the hematocrit.. as for the osmolality.. im not sure, id have to look it up..but its exam time for me... so later!!!!
  4. by   mspringer
    Nevermind, I just figured it out.
  5. by   zacarias
    Think about it this way and don't overthink it (like I do)...When you add hypotonic solutions, it makes the serum osmolarity go down THUS pushing fluid into the cells.