free water

  1. 0
    In regards to NG tube, what does the term free water mean?
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  4. 0
    As far as I understand it's water that is necessary for hydration, in other words the water you would drink on a daily basis to prevent dehydrating yourself. For me that's roughly 2000cc/day. If I was unable to drink and was relying solely on the NG tube for nourishment and hydration, the free water would be used in place of my oral fluids. I could be wrong and I am sure its probably a bit more complicated than that but that's the way I understand it?
  5. 0
    Quote from SimonTan
    In regards to NG tube, what does the term free water mean?
    We had a formula with our tube feed. The machine would give tube feed followed by water every so often.
  6. 4
    Free water is water without solutes-- plain, ordinary water. Bouillon, for example, is not free water. NS is not free water. Juice is not free water.

    People who have low serum sodium are often on a free water restriction. Why is that?
    Always_Learning, Malorymug, KelRN215, and 1 other like this.
  7. 5
    Quote from GrnTea
    Free water is water without solutes-- plain, ordinary water. Bouillon, for example, is not free water. NS is not free water. Juice is not free water.

    People who have low serum sodium are often on a free water restriction. Why is that?
    I always enjoy reading your posts. I knew it was more complicated. I have dubbed you the fluid queen. Your posts helped me pass my fluid test.
    poppycat, SunshineDaisy, krisiepoo, and 2 others like this.
  8. 1
    Quote from quirkystudent
    I always enjoy reading your posts. I knew it was more complicated. I have dubbed you the fluid queen. Your posts helped me pass my fluid test.

    Happy to hear it! You have made my day.

    Now, tell the OP why people with low serum Na+ are on free water restrictions! (You know how I cranky I get about memorize-for-the-test-and-forget-it!!)
    poppycat likes this.
  9. 1
    Quote from GrnTea
    Free water is water without solutes-- plain, ordinary water. Bouillon, for example, is not free water. NS is not free water. Juice is not free water. People who have low serum sodium are often on a free water restriction. Why is that?
    Huh. For some reason I thought it meant "all the water you want!"

    Learn something (or multiple somethings in this field) every day!
    NutmeggeRN likes this.
  10. 3
    Quote from GrnTea
    Happy to hear it! You have made my day. Now, tell the OP why people with low serum Na+ are on free water restrictions! (You know how I cranky I get about memorize-for-the-test-and-forget-it!!)
    This is how out instructor explained it. When your electrolytes are imbalanced you don't want to add more of the opposite. Water and Na are buddies and need to balance so if your serum sodium is low you wouldn't want to make it a worse ratio by adding more of the opposite to the body... ie: water. It'll only cause a larger and worse imbalance. You would treat it by bringing the Na levels up, not the fluids to restore the balance.
  11. 9
    The short way to think about this is that serum sodium is not telling you about sodium; it really is telling you about water balance. Low water balance (de-hydrat-ion) makes the sodium more concentrated-> higher serum sodium. Water excess dilutes serum sodium -> lower serum sodium.

    You change these not by adding or withholding sodium, but by regulating the water.

    So someone with hyponatremia is usually on a free water restriction to prevent further dilution.
    tigerRN2013, canigraduate, Alana R., and 6 others like this.
  12. 4
    Quote from GrnTea
    The short way to think about this is that serum sodium is not telling you about sodium; it really is telling you about water balance. Low water balance (de-hydrat-ion) makes the sodium more concentrated-> higher serum sodium. Water excess dilutes serum sodium -> lower serum sodium. You change these not by adding or withholding sodium, but by regulating the water. So someone with hyponatremia is usually on a free water restriction to prevent further dilution.
    And just like that, GrnTea rocked.
    canigraduate, GrnTea, Amnesty, and 1 other like this.


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