Help Hypotonic, Isotonic, & Hypertonic Solutions - page 3

can anyone please help me understand the use of these solutions?:o... Read More

  1. by   xtxrn
    Quote from fmeu6038
    hi need more understanding..if d5% becomes hypotonic or free water as soon as its infused (VickyRN), then why can't we just infuse bottled or mineral water??
    they're hypotonic as well- besides being for oral use and not sterile.... too much free water puts the patient at risk for cerebral edema, CHF, and other excess fluid issues.
  2. by   ELIZABETH KUSI
    I am very happy to join this learning network
  3. by   ELIZABETH KUSI
    I am confused of how excessive administration of d5w can cause increased intracranial pressure
  4. by   choralguy
    I am in A&P and have a question...A woman is passing blod clots. Her hemoglobin level is 10.4 and she has been diagnosed as slightly anemic. Admissions orders include starting an IV solution of dextrose 5% and lactated Ringer's solution.

    Do you expect the IV solution to be hypertonic, hypotonic, or isotonic? Why?

    A. Hypertonic - to decrease the size of the red blood cell
    B. Isotonic - becacuse this solution does not change the size of the red blood cell
    C. Hypotonic - to increase the size of the red blood cell and thus enable it to carry more oxygen
    D. Hypertonic - to cause fluid shifts from the intracellular space to the extra-cellular space and thus replace the blood lost by the patient from the uterine bleeding.

    I do not see how A could help. B would make sense for most IV fluids from what I can tell. C would be helpful if it is true that a larger cell carries more oxygen. I do not understand how D would cause the added water content to turn to blood.

    I really desire to learn this stuff, so if you could explain why one of these is the best answer, I would greatly appreciate it.
  5. by   turnforthenurse
    Quote from xtxrn
    they're hypotonic as well- besides being for oral use and not sterile.... too much free water puts the patient at risk for cerebral edema, CHF, and other excess fluid issues.
    Plain 'ole free water just isn't safe to give, period. D5W becomes hypotonic once it enters the body because the dextrose is metabolized...but that is a safe way of giving free water. The IV solution also has a little bit of calories because of the dextrose.

    Quote from choralguy
    I am in A&P and have a question...A woman is passing blod clots. Her hemoglobin level is 10.4 and she has been diagnosed as slightly anemic. Admissions orders include starting an IV solution of dextrose 5% and lactated Ringer's solution.

    Do you expect the IV solution to be hypertonic, hypotonic, or isotonic? Why?

    A. Hypertonic - to decrease the size of the red blood cell
    B. Isotonic - becacuse this solution does not change the size of the red blood cell
    C. Hypotonic - to increase the size of the red blood cell and thus enable it to carry more oxygen
    D. Hypertonic - to cause fluid shifts from the intracellular space to the extra-cellular space and thus replace the blood lost by the patient from the uterine bleeding.

    I do not see how A could help. B would make sense for most IV fluids from what I can tell. C would be helpful if it is true that a larger cell carries more oxygen. I do not understand how D would cause the added water content to turn to blood.
    In regards to blood administration and hanging fluids, you should always hang an isotonic solution - 0.9% NS. A hypertonic or hypotonic solution will damage the blood cells.

    As for D5LR, the solution itself is hypertonic. A hypertonic fluid will pull fluid from the cells (cells shrink) and into the intravascular space. It wouldn't "turn to blood" but will help restore intravascular volume.

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