A parent asks why their 12-month-old can pull to stand but cannot walk alone. Which explanation reflects the sequential trend in development?

A. Hydralazine is incorrect because it is an antihypertensive used to lower blood pressure in preeclampsia or eclampsia, but it does not reverse magnesium sulfate toxicity, which is the immediate concern given the symptoms of respiratory depression, oliguria, and absent deep tendon reflexes.

B. Methylergonovine is incorrect because it is a uterotonic used to control postpartum hemorrhage. It is not indicated for magnesium toxicity and would not address the life-threatening respiratory and neuromuscular effects of magnesium sulfate overdose.

C. Calcium gluconate is correct because it is the antidote for magnesium sulfate toxicity. Symptoms of toxicity include respiratory depression (RR <12), oliguria (<30 mL/hr), absent deep tendon reflexes, and eventually cardiac arrhythmias or arrest. Administering 10 mL of 10% calcium gluconate IV over 3–5 minutes can rapidly reverse neuromuscular and cardiac effects while supportive care (e.g., stopping magnesium infusion and monitoring) is continued.

D. Narcan is incorrect because it is an opioid antagonist used to reverse opioid overdose. It has no effect on magnesium sulfate toxicity and would not address the neuromuscular or respiratory compromise in this patient.

A. Performing all intrusive procedures first is incorrect because starting with invasive or uncomfortable procedures can cause significant anxiety and fear in a toddler. This approach often results in the child resisting further assessment, making it more difficult to complete the exam accurately and safely. Toddlers respond better when trust is gradually built, and starting with procedures that are frightening can interfere with cooperation.

B. Removing all clothing at once is incorrect because toddlers often feel vulnerable and frightened when fully exposed. Gradual undressing allows the child to maintain a sense of security and modesty. Keeping parts of the body covered until each area is assessed helps minimize distress, making the assessment smoother and safer for both the child and the nurse.

C. Allowing the toddler to sit in the parent's lap and examining the least invasive areas first is correct. This approach provides comfort and reassurance through physical proximity to the parent, which helps the toddler feel safe. Starting with non-threatening areas, such as observing the child’s general appearance or auscultating the heart and lungs, builds trust and reduces anxiety. Offering simple choices, such as letting the child choose which arm to examine first, gives the toddler a sense of control and autonomy. Praise and positive reinforcement further encourage cooperation, making the examination more effective and less stressful. This approach aligns with developmentally appropriate care for toddlers, emphasizing safety, emotional support, and gradual progression from non-invasive to more invasive procedures.

D. Starting the examination with the toddler on the exam table immediately is incorrect because forcing the child to separate from the parent can increase anxiety and resistance. Toddlers are more cooperative when they feel secure, so placing them directly on an exam table without parental support can lead to distress, crying, and possible refusal to participate, which may compromise the quality and safety of the assessment.