Correct Answer: C

Rationale: Nifedipine primarily acts as a calcium channel blocker. It lacks significant effects on the calcium channels of the heart, making it ineffective for treating dysrhythmias like Atrial Fibrillation. Nifedipine is commonly used in conditions such as angina pectoris, essential hypertension, and vasospastic angina due to its vasodilatory effects and anti-anginal properties.

Correct Answer: D

Rationale: The correct answer is D because parents should understand the importance of medication adherence post-transplant to prevent rejection. Following the prescribed medication regimen is crucial for the success of the kidney transplant and the overall health of the child. Monitoring and ensuring the child takes their medications as directed by the healthcare provider are essential components of post-transplant care.

Correct Answer: B

Rationale: The nurse should avoid venipunctures whenever possible to minimize the risk of bleeding in a child with thrombocytopenia.

Correct Answer: B

Rationale: When a patient is already receiving glucocorticoids for rheumatoid arthritis and complains of a headache, it is essential to consider the potential interactions and side effects of additional medications. Aspirin and NSAIDs like ibuprofen and naproxen sodium can increase the risk of gastrointestinal irritation and ulceration when used concurrently with glucocorticoids. Acetaminophen is a safer choice in this scenario for managing the patient's headache without exacerbating the gastrointestinal issues associated with the use of glucocorticoids.

Correct Answer: A

Rationale: It is crucial to assess the neurovascular status of the extremities every 4 hours to monitor for any signs of complications such as impaired circulation or nerve damage. This frequent assessment helps in early detection of any issues that may arise postoperatively, allowing for timely intervention and prevention of potential complications.