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IV Fluids are of three types:

  1. ⁣Isotonic solutions = stay where 𝐈 put it⁣⁣
  2. ⁣⁣hyp𝐎tonic solutions = go 𝐎ut of the blood vessel
  3. hyp𝐄rtonic solutions = 𝐄nter the blood vessel
  1. Isotonic solutions (=)

such as 0.9% normal saline and Lactated Ringers, will stay inside the bloodstream and are used for fluid and electrolyte replacement.

Make sure you are watching for fluid overload/edema (*do not give this solution to volume overloaded patients)⁣⁣

Isotonic IV solutions restore fluid volume because they fill the tissues and maintain fluid volume more effectively than hypertonic or hypotonic solutions.

2. Hypotonic solutions, (⬇️)

such as 0.45% normal saline, will shift fluid into the cells and are used for cellular hydration.

Make sure you’re watching for hypotension (due to decreased blood volume) (*do not give to hypotensive pt or to a pt with increased ICP)⁣⁣

When hypotonic IV solutions are infused, it results in a decreased concentration of dissolved solutes in the blood as compared to the intracellular space.

3. Hypertonic solutions, (⬆️)

such as D51/2NS, will shift the fluid out of the cells and into the blood vessel.

These fluids are used for hypovolemia, vascular expansion, and third spacing.

Watch for hypervolemia, cellular dehydration, and hyperglycemia

Hypertonic fluidsΒ contain a higher concentration of solute compared to plasma and interstitial fluid; this creates an osmotic gradient and drives fluid from the interstitial space into the intravascular space.

Nepali Nurse

Nepali Nurse,RN,BSN

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