64. Which change in fluid or electrolyte status would a nurse identify as being consistent with syndrome of inappropriate antidiuretic hormone (SIADH)?
64. Which change in fluid or electrolyte status would a nurse identify as being consistent with syndrome of inappropriate antidiuretic hormone (SIADH)?
. Serum sodium of 150 mEq.
. Urine output of 2,500 mL/24 hr.
. Urine specific gravity of 1.036.
. Presence of edema.
Test-Taking Tip
Look for key words in the stem—inappropriate ADH means too much ADH.
Content Area: Adult Health, Fluid and Electrolyte Imbalances; Integrated Process: Nursing Process, Analysis; Cognitive Level: Application; Client Need/Subneed: Physiological Integrity/Physiological Adaptation/Fluid and Electrolyte Imbalances
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Answer 1 is incorrect because the increase in intravascular volume causes a hemodilution of the serum sodium. Answer 2 is incorrect because output is decreased, not increased. Answer 3 is correct because, in SIADH, there is an increase in the antidiuretic hormone, which results in increased total body water and hyponatremia. Urine is concentrated and volume is decreased. Answer 4 is incorrect because intravascular volume and weight increase, but there is no interstitial edema.