A nurse cares for a patient with a possible diagnosis of syndrome of inappropriate antidiuretic hormone (SIADH). The patient's serum sodium level is 114 mEq/L. What nursing action is appropriate?

Consult with the dietitian about increased dietary sodium.

Restrict the patient's fluid intake to between 500 to 1000 mL/day.

Instruct assistive personnel to measure intake and output.

Handle the patient gently by using turn sheets for repositioning.