Which intravenous fluid is recommended for treating severe hypovolemic hypernatremia?

In the context of treating severe hypovolemic hypernatremia, it is essential to restore both volume and correct the sodium concentration safely. Intravenous fluids that provide both sodium and water are generally used in these cases. Normal saline (NS) is a solution that contains a balanced concentration of sodium (154 mEq/L) and chloride, making it effective in volume resuscitation.

When managing severe hypovolemic hypernatremia, isotonic fluids like normal saline help expand the intravascular volume and provide necessary sodium, which can be beneficial in a patient who has lost significant volume. However, while it does not directly lower serum sodium levels, it is vital that the fluid resuscitation occurs in a controlled manner to avoid overly rapid correction of hypernatremia, which can lead to neurological complications.

Other options may not be suitable for this specific condition. For example, 5% dextrose in water (D5W) would provide free water but lacks electrolytes and can exacerbate hypernatremia if used alone. Lactated Ringer's solution contains less sodium than NS and may not be as effective for volume resuscitation in hypernatremic patients. Lastly, 5% dextrose