Final answer:
The first line treatment for mild-moderate dehydration is the administration of fluids orally. Oral rehydration solutions are especially effective for rehydrating patients with diarrhea or vomiting. Intravenous fluids may be used for more severe cases of dehydration.
Step-by-step explanation:
The first line treatment for mild-moderate dehydration is the administration of fluids orally. This can be done by drinking water or consuming oral rehydration solutions that contain a balance of electrolytes and carbohydrates. Oral rehydration solutions are especially effective for rehydrating patients with diarrhea or vomiting, as they help replenish the electrolytes lost through these symptoms.
For more severe cases of dehydration or when oral rehydration is not possible, fluids may be given intravenously. This involves administering a solution directly into a vein to quickly rehydrate the body. The solution used typically contains electrolytes, such as sodium and potassium, to restore the body's electrolyte balance.