In the management of Hyperosmolar Hyperglycemic State, what is the role of hydration status and initial fluid choice?

• A. Aggressive rehydration with isotonic saline as initial fluid
• B. Focus on correcting hyperglycemia first and fluids later
• C. Oral rehydration alone is sufficient
• D. Start with hypotonic fluids to avoid fluid overload

Answer: (A)

Profound dehydration from osmotic diuresis in Hyperosmolar Hyperglycemic State makes restoring circulating volume the top priority. Aggressive fluid replacement with isotonic saline strengthens intravascular volume, improves renal perfusion, and helps dilute the high blood glucose, all of which support better overall stabilization. Isotonic fluids are chosen initially because they expand the extracellular fluid without causing rapid shifts in plasma osmolality; using hypotonic fluids too early can worsen hypernatremia and risk cerebral edema, and oral rehydration alone cannot correct the severe dehydration seen in this state. After the patient is hemodynamically stable and glucose begins to come down—typically when it approaches about 200 mg/dL—fluids containing dextrose are started to prevent hypoglycemia and allow insulin to continue correcting hyperglycemia and electrolytes. Potassium and other electrolytes are monitored and corrected as needed during this process.