A patient with severe dehydration arrives in the emergency department with low blood pressure and tachycardia. The nurse prepares to start IV therapy. Which fluid is usually the first choice for initial fluid resuscitation?

In cases of hypovolemic shock or dehydration, 0.9% normal saline is commonly used for initial fluid resuscitation. It is an isotonic crystalloid solution that expands intravascular volume and restores circulation quickly. It helps maintain tissue perfusion until the underlying cause is corrected.