When caring for a patient with syndrome of inappropriate antidiuretic hormone (SIADH), the nurse anticipates which electrolyte abnormality characteristic of this disease?



• SIADH is the inappropriate secretion of ADH despite normal or increased plasma volume that results in hyponatremia and hypo-osmolality. These actions result in impaired water excretion

• The decrease in sodium is due to hemodilution, not due to a sodium deficiency

• Potassium and calcium concentrations generally remain within normal limits

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