Medical Surgical Sodium Na+ #12

Question

The nurse is caring for a client with hyponatremia secondary to syndrome of inappropriate antidiuretic hormone (SIADH). Which intravenous solution will the nurse expect to be prescribed?

Answers

  1. Isotonic
    • Rationale:

      This answer is not correct because in SIADH, isotonic solutions are not indicated because urine output is minimal and water is retained thus exacerbating fluid overload.

  2. Hypotonic
    • Rationale:

      This answer is not correct because in SIADH, hypotonic solutions are not indicated because urine output is minimal and water is retained thus exacerbating fluid overload.

  3. Hypertonic
    • Rationale:

      This answer is correct because hypertonic solutions are administered for clients who are diagnosed with SIADH who are experiencing dilutional hyponatremia to restore homeostasis.

  4. Lactated Ringers
    • Rationale:

      This answer is not correct because while Lactated Ringer’s solution is appropriate for the treatment of hyponatremia, this IV fluid is not used for clients who experience dilutional hyponatremia as a result of SIADH.

Overview

Syndrome of inappropriate antidiuretic hormone secretion (SIADH) is a condition in which the body makes too much antidiuretic hormone (ADH). ADH helps the kidneys control the amount of water the body loses through the urine.

Explanation

Learning Outcomes

ADH helps the kidneys control the amount of water the body loses through the urine. SIADH causes the body to retain too much water thereby causing dilutional hyponatremia. When hyponatremia is severe, hypertonic solutions may be used but should be infused with caution due to the potential for development of heart failure.

Test Taking Tip

Consider the pathophysiology of SIADH to answer this question correctly.

Video Rationale