Correct Answer: D

Rationale: In hyperkalemia, cardiac arrhythmias are the most critical and life-threatening manifestation that requires immediate intervention. Hyperkalemia can lead to dangerous heart rhythm disturbances, potentially resulting in cardiac arrest. Prompt treatment is essential to stabilize the heart rhythm and prevent life-threatening complications.

Correct Answer: C

Rationale: The nurse should identify the sound heard during auscultation as tachypnea, which is a rapid, regular breathing pattern. This breathing pattern often occurs with anxiety, fever, metabolic acidosis, or severe anemia.

Correct Answer: A

Rationale: When a child is receiving prednisone to treat nephrotic syndrome, it is crucial to assess for infection. Prednisone suppresses the immune system, making the child more vulnerable to infections. Since steroids can mask typical signs of infection, it is essential to look for subtle symptoms to ensure prompt treatment and prevent complications.

Correct Answer: A

Rationale: The total intake is 440 mL (4 oz of Pedialyte = 120 mL, half of an 8 oz Jell-O = 120 mL, and 200 mL of IV fluids). Therefore, the correct answer is 440.

Correct Answer: C

Rationale: The nurse should inform the parent that the child will need pulmonary function tests every 12 to 24 months to assess lung function and response to treatment. These tests help evaluate the presence of lung disease, monitor disease progression, and assess the effectiveness of the current therapeutic regimen in managing asthma.