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I think that first of all we have to assess hypovolemia. If there are true signs of hypovolemia, I think that this topic should be addressed first, because correcting the extracellular fluid volume will lead to correction of sodium concentration. So, in a pt with apparent signs of hypovolemic shock I would administer normal saline.

If the pt is euvolemic (and even worse hypervolemic), there is a considerable risk of volume overload, which would secondarily lead to edema (pulmonary, anasarca, heart congestion etc). In this case, I think the appropriate management should involve D5W & 1/2NS, in order to cause osmotic diuresis & consequent natriuresis at the same time.
 
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