Maternal / Newborn Question #46


The nurse is assessing a 3-year-old with a diagnosis of Tetralogy of Fallot. The child becomes short of breath with ambulation. Which action will the nurse perform next?


  1. Apply oxygen per nasal cannula at 3 L/min.
    • Rationale:
  2. Place the child in knee-chest position.
    • Rationale:
  3. Lay the child supine
    • Rationale:
  4. Call for a crash cart.
    • Rationale:



The correct answer is B because the knee-chest position decreases blood return to the heart and increases cardiac output. This intervention will relieve the cardiac load. Selection A, C, and D are incorrect as oxygen will not decrease the cardiac load, supine position will not help hemodynamics, and the crash cart is not called for since knee-chest may relieve the symptoms.

Learning Outcomes

Test Taking Tip

Video Rationale