Correct Answer: A

Rationale: The correct answer is to administer nitroglycerin sublingually. Administering nitroglycerin sublingually is the priority action for a client with chest pain and a history of coronary artery disease. Nitroglycerin helps dilate the coronary arteries, improving blood flow to the heart muscle and providing rapid relief of chest pain. Obtaining a 12-lead ECG, measuring vital signs, and administering oxygen are important actions but should follow the administration of nitroglycerin in the management of chest pain in a client with coronary artery disease.

Correct Answer: B

Rationale: The best nursing action in response to a terminally ill client stating their agnostic beliefs is to document the client's spiritual assessment. By documenting this information, the healthcare team can ensure that the client's beliefs are acknowledged and respected in their care plan. Providing information about the chapel's hours or inviting the client to a healing service may not align with the client's beliefs and preferences. Offering to contact a spiritual advisor of the client's choice may not be necessary if the client has clearly stated their agnostic beliefs, as they may not wish to engage in spiritual counseling.

Correct Answer: A

Rationale: Monitoring the white blood cell count is crucial when a patient is undergoing chemotherapy for breast cancer. Chemotherapy can lead to neutropenia, a condition of low white blood cell count, which significantly increases the risk of infections. Monitoring white blood cell count helps healthcare providers intervene promptly to prevent severe infections. Hemoglobin level, while important in assessing oxygen-carrying capacity, is not the priority in this scenario. Serum creatinine and blood glucose levels are not directly impacted by chemotherapy for breast cancer.

Correct Answer: A

Rationale: The correct answer is to administer insulin as prescribed. When a client with diabetes mellitus presents with a critically high blood glucose level like 600 mg/dL, the priority action is to lower the blood glucose level promptly to prevent complications. Insulin is the appropriate medication to rapidly reduce high blood glucose levels. Administering oral hypoglycemic agents may not act quickly enough in this critical situation. While monitoring blood glucose levels frequently is important, immediate intervention to lower the high blood glucose level takes precedence. Providing a high-calorie diet is contraindicated in this scenario as it would further elevate the blood glucose level.

Correct Answer: A

Rationale: Heparin is typically administered in the abdomen for self-injection to avoid muscle tissue and for better absorption. The subcutaneous tissue in the abdomen provides a larger area for injection and is usually recommended for heparin administration. Administering heparin in the thigh, upper arm, or buttock may not be as effective or safe as the abdomen due to variations in absorption rates and potential risks associated with muscle injection.