I was giving a hypothetical scenario with the vomiting and dehydration. The question I received was super vague. All the info it gave was the patient had a bowel obstruction and the fluid to be given was D5W in .9% saline. Would I be correct in thinking that the reason to give a patient D5 in .9% would be because the patient has become hyponatremic? If lab values were to hypothetically to come back as normal in the relation to that of sodium, the standard would an isotonic solution such as .9%? I have gone off on a tangent a bit with its relation to the actual quiz question, but I am just trying to critically think about why we would choose one solution over the other and whether my reasoning is on the right track. From my understanding, we'd want to check the lab values before giving the solution because we cannot determine whether or not the solution is correct going just based on the diagnosis?