What is the nurse's first action when planning to teach the parents of an infant with a congenital heart defect (CHD)?

Choice A rationale:

A stat magnesium sulfate level (Choice A) is unnecessary in this situation. The symptoms described - increased temperature, pulse rate, and blood pressure, along with absent deep tendon reflexes - indicate magnesium sulfate toxicity. Discontinuing the infusion and managing the symptoms take precedence over checking the magnesium sulfate level.

Choice B rationale:

Administering oxygen (Choice B) is important for maintaining the patient's oxygenation levels, but it does not address the magnesium sulfate toxicity. The primary intervention should be to discontinue the infusion and manage the symptoms.

Choice C rationale:

Discontinuing the magnesium sulfate infusion (Choice C) is the correct action in this situation. The symptoms, including absent deep tendon reflexes and the patient's complaint of thirst and warmth, indicate magnesium sulfate toxicity. Stopping the infusion is crucial to prevent further complications.

Choice D rationale:

Hydralazine (Choice D) is an antihypertensive medication and is not the appropriate intervention for magnesium sulfate toxicity. Managing magnesium sulfate toxicity involves discontinuing the infusion and providing supportive care.

This question assesses the nurse's ability to differentiate between pathological apnea and normal physiological variations in preterm neonates. Understanding neonatal respiratory development is crucial for distinguishing between clinical distress and common, benign breathing patterns observed in the premature population.

Choice A rationale: Apnea in infants is clinically defined as a cessation of breathing lasting 20 seconds or longer, or shorter if associated with bradycardia or cyanosis. Shorter pauses are considered periodic breathing, which is distinct from true apneic episodes.

Choice B rationale: While preterm infants have immature cardiovascular regulation, brief respiratory pauses followed by rapid breathing do not directly indicate fluctuating blood pressure. These patterns are primary reflections of an underdeveloped brainstem control of the respiratory rhythm and ventilation.

Choice C rationale: Maintaining a neutral thermal environment is vital for preventing cold stress, which increases oxygen consumption. However, this periodic breathing pattern is a developmental neurological phenomenon rather than a direct metabolic or thermoregulatory compensation for thermal instability.

Choice D rationale: Periodic breathing, characterized by brief pauses followed by rapid respiration, is a common and typically benign pattern in premature infants. It is attributed to the immaturity of the respiratory center in the brain and generally resolves as the infant matures.