Correct Answer: A

Rationale: The correct answer is A: Administer epinephrine. Epinephrine is the first-line treatment for severe allergic reactions as it acts quickly to reverse symptoms like airway swelling and low blood pressure. It helps to open airways and increase blood pressure. Antihistamines (B) are not as fast-acting as epinephrine in severe reactions. Applying a cold compress (C) is not effective in treating anaphylaxis. Placing the client in a supine position (D) can worsen breathing difficulties. Administering epinephrine is crucial in managing severe allergic reactions promptly and effectively.

Correct Answer: A

Rationale: The correct answer is A: Administer nitroglycerin. The nurse should first assess the client's chest pain, then administer nitroglycerin if indicated for suspected cardiac origin. Nitroglycerin helps dilate blood vessels, improving blood flow to the heart. This can alleviate chest pain associated with angina or myocardial infarction. Administering morphine or aspirin should come after nitroglycerin if needed. Performing an ECG is important but should not delay immediate treatment with nitroglycerin for chest pain of cardiac origin.

Correct Answer: A

Rationale: The correct answer is A: Administer epinephrine. Epinephrine is the first-line treatment for severe allergic reactions as it acts quickly to reverse symptoms like airway swelling and low blood pressure. It helps to open airways and increase blood pressure. Antihistamines (B) are not as fast-acting as epinephrine in severe reactions. Applying a cold compress (C) is not effective in treating anaphylaxis. Placing the client in a supine position (D) can worsen breathing difficulties. Administering epinephrine is crucial in managing severe allergic reactions promptly and effectively.

Correct Answer: D

Rationale: The correct answer is D: cirrhosis. Cirrhosis leads to impaired liver function, causing the liver to be unable to effectively metabolize ammonia, leading to high ammonia levels in the blood. Renal failure (choice A) is associated with high creatinine levels, not ammonia. Psoriasis (choice B) is a skin condition unrelated to ammonia levels. Lupus (choice C) is an autoimmune disease affecting various organs, not directly linked to high ammonia levels. In summary, cirrhosis is the only condition among the options that directly impacts liver function and can lead to high ammonia levels in the blood.

Correct Answer: D

Rationale: The correct answer is D - unexplained vaginal bleeding. This is a contraindication for hormone replacement therapy as it could indicate a serious underlying condition such as endometrial cancer. Hormone replacement therapy can increase the risk of endometrial cancer, so it should not be used in the presence of unexplained vaginal bleeding. A, B, and C are incorrect: A: Family history of stroke is not a direct contraindication for hormone replacement therapy. It may influence the decision-making process, but it is not a definitive contraindication. B: Ovaries removed before age 45 may actually be an indication for hormone replacement therapy to manage symptoms of menopause. C: Frequent hot flashes and/or night sweats are common symptoms of menopause and are not contraindications for hormone replacement therapy.