A nurse is caring for a client who has hypernatremia and requires IV fluid therapy due to his NPO status. Which of the following solutions should the nurse prepare to infuse for this client?
A.
Lactated Ringer’s
B.
0.45% sodium chloride
C.
Dextrose 5% in 0.9% sodium chloride
D.
Dextrose 10% in water
The Correct answer and Explanation is:
The correct answer is B. 0.45% sodium chloride.
Explanation
Hypernatremia is characterized by elevated sodium levels in the blood, which can lead to cellular dehydration. This condition often arises in patients who are NPO (nothing by mouth) due to inadequate fluid intake, leading to water loss exceeding sodium loss. In treating hypernatremia, the primary goal is to gradually decrease sodium levels while ensuring adequate hydration.
Option A: Lactated Ringer’s is not appropriate for hypernatremia because it contains sodium and lactate, which can further elevate sodium levels. While it is an isotonic solution commonly used for fluid resuscitation, it is not ideal for correcting hypernatremia.
Option B: 0.45% sodium chloride (hypotonic solution) is the most appropriate choice. This solution provides a lower concentration of sodium than normal serum levels, promoting the movement of water into the cells, thereby diluting the elevated sodium concentration. Administering hypotonic solutions like 0.45% NaCl helps restore the osmotic balance and rehydrate cells, making it suitable for a patient with hypernatremia.
Option C: Dextrose 5% in 0.9% sodium chloride is isotonic but contains a higher sodium concentration. Although dextrose can provide calories, the accompanying sodium is not beneficial for a patient with hypernatremia.
Option D: Dextrose 10% in water is also not suitable because it provides no sodium, which may lead to hypovolemia without addressing hypernatremia. Additionally, using dextrose solutions can lead to fluid shifts and potential worsening of hypernatremia.
In summary, 0.45% sodium chloride is the ideal choice for a client with hypernatremia who is NPO, as it effectively reduces sodium levels while rehydrating the patient. Careful monitoring of sodium levels and fluid balance is crucial during this treatment to avoid rapid shifts that can lead to complications.