Correct Answer: A

Rationale: To calculate the correct dose for each administration, you first need to find the total daily dose: 300 mg/kg * 25 kg = 7500 mg/day. Since this total dose is divided into equally divided doses every 4 hours, there are 6 doses in 24 hours. Therefore, 7500 mg · 6 doses = 1250 mg per dose. The nurse should administer 1250 mg every 4 hours, resulting in a total of 1875 mg for each dose in a 24-hour period. Choice A, 1875 mg, is the correct answer. Choice B, 625 mg, is incorrect as it does not consider the total daily dose and the frequency of administration. Choice C, 2000 mg, is incorrect as it is not the calculated dosage based on the given parameters. Choice D, 1500 mg, is also incorrect as it does not reflect the correct dosage calculation for each dose.

Correct Answer: C

Rationale: If a child with tetralogy of Fallot becomes pale, cool, and lethargic, these symptoms may indicate a hypoxic episode or worsening condition. It is crucial to contact the healthcare provider immediately for further evaluation and management to ensure the child's safety and well-being. Option A is incorrect because electrolyte solution intake is not the immediate action needed for these symptoms. Option B is incorrect as positioning alone may not address the underlying issue. Option D is incorrect as providing a quiet time is not appropriate if the child is experiencing concerning symptoms that require prompt medical attention.

Correct Answer: D

Rationale: It is crucial for the nurse to educate the mother that giving pain medication around the clock helps manage pain effectively and improves the child's quality of life. This approach ensures a more consistent level of pain relief and prevents the pain from becoming severe, which can be more challenging to manage. Choices A, B, and C do not address the importance of consistent pain management and may not provide adequate relief for the child's condition.

Correct Answer: C

Rationale: Children with von Willebrand disease have a deficiency in a clotting protein, putting them at risk of bleeding episodes. The priority nursing intervention for a child with von Willebrand disease is to guard against bleeding injuries to prevent excessive bleeding or hemorrhage. Choices A, B, and D are not the priority interventions for von Willebrand disease. While reducing exposure to infection is important for any hospitalized child, it is not the priority for von Willebrand disease. Eliminating contact with cold objects is more relevant for conditions like Raynaud's disease. Reducing contact with other children is not a specific priority related to managing von Willebrand disease.

Correct Answer: D

Rationale: Acknowledging the child's anger as a coping mechanism helps validate their feelings and can open a dialogue for further support.