Correct Answer: B

Rationale: The correct answer is B. Using nitroglycerin as needed, every 5 minutes, up to 3 doses, is the appropriate management for angina at rest. This helps dilate blood vessels, improving blood flow to the heart. Choice A is incorrect because chest pain that persists at rest should be addressed immediately, not waiting for 30 minutes. Choice C is incorrect as avoiding physical activity is not a recommended approach during an angina episode. Choice D is incorrect because nitroglycerin should be used during chest pain episodes, not as a preventive measure before physical activity.

Correct Answer: C

Rationale: In clients receiving digoxin therapy, low potassium levels can increase the risk of digoxin toxicity. Therefore, when the nurse notes a serum potassium level of 3.0 mEq/L, it is crucial to hold the next dose of digoxin. Notifying the healthcare provider is essential to ensure appropriate interventions, such as potassium supplementation, can be implemented. Administering a potassium supplement without healthcare provider guidance may lead to rapid potassium level changes and potential adverse effects. Increasing dietary potassium intake alone may not promptly address the low serum potassium level in this acute situation.

Correct Answer: A

Rationale: The correct answer is A: 'Antiembolism stockings on, leg exercises performed hourly.' This documentation indicates the correct performance of activities to prevent postoperative venous stasis, as both components are crucial for prevention. Choice B is incorrect because removing stockings hourly is not recommended. Choice C is incorrect as leg exercises should be performed despite wearing antiembolism stockings. Choice D is incorrect as demonstrating the ability to move extremities well does not specifically address the prevention of venous stasis.

Correct Answer: C

Rationale: The correct answer is C: 'Check for bowel movement and changes in stool.' Intussusception can cause obstruction in the bowel, leading to symptoms like abdominal pain, vomiting, and 'currant jelly' stools. Monitoring for changes in bowel movement, especially the passage of 'currant jelly' stools, is crucial for early detection of worsening conditions. Choices A, B, and D are important assessments in pediatric care but are not as specific or crucial as checking for changes in bowel movement in a child diagnosed with intussusception.

Correct Answer: D

Rationale: The correct answer is D because tasks like applying and caring for a client's rectal pouch are within the UAP's scope of practice, as they do not require clinical judgment. Choices A, B, and C involve more complex assessments or interventions that require clinical judgment and should be performed by licensed nursing staff.