A nurse is planning care for a child who has severe diarrhea. Which of the following actions is the nurse’s priority?

Choice A reason: Maintaining fluid therapy is critical in severe diarrhea to replace ongoing losses, but it assumes prior assessment of fluid status. Without evaluating dehydration severity (e.g., skin turgor, urine output), therapy may be inadequate or excessive, risking shock or overload. Assessment is the priority to guide effective fluid management. Choice B reason: Rehydration corrects fluid deficits in diarrhea, but it follows assessment to determine the degree of dehydration (mild, moderate, severe). Administering fluids without evaluating fluid balance may lead to inappropriate volumes or electrolyte imbalances. Assessment ensures tailored rehydration, making it secondary to evaluating fluid status first. Choice C reason: Assessing fluid balance is the priority in severe diarrhea, as it determines dehydration severity using clinical signs like weight loss, sunken fontanelles, or tachycardia. This guides rehydration volume and rate, preventing hypovolemic shock or fluid overload. Accurate assessment ensures targeted therapy, making it the critical first step in care. Choice D reason: Introducing a regular diet is inappropriate in severe diarrhea, as it may worsen fluid loss by increasing osmotic load in the gut. Rehydration and electrolyte correction are prioritized. Assessment of fluid balance precedes dietary changes, ensuring stabilization before resuming normal intake, making this a non-priority action.