According to the provided material, SIADH is associated with which fluid status?

According to the provided material, SIADH is associated with which fluid status?

• A. Hypovolemia
• B. Euvolemia
• C. Fluid Overload
• D. Dehydration

Answer: (C)

Excess ADH in SIADH causes the kidneys to reabsorb water, diluting the blood and producing hyponatremia with low serum osmolality. However, the body’s effective circulating volume stays normal, so the patient appears euvolemic—not dehydrated and not fluid overloaded. Clinically that means no signs of volume depletion (no dehydration) and typically no edema (no overt fluid overload). Lab clues support this: low serum osmolality with inappropriately concentrated urine and high urine sodium, all in the setting of preserved volume status.

Excess ADH in SIADH causes the kidneys to reabsorb water, diluting the blood and producing hyponatremia with low serum osmolality. However, the body’s effective circulating volume stays normal, so the patient appears euvolemic—not dehydrated and not fluid overloaded. Clinically that means no signs of volume depletion (no dehydration) and typically no edema (no overt fluid overload). Lab clues support this: low serum osmolality with inappropriately concentrated urine and high urine sodium, all in the setting of preserved volume status.