Correct Answer: B

Rationale: Long-term aspirin therapy, especially at higher doses, can increase the risk of gastrointestinal bleeding. Aspirin irreversibly inhibits cyclooxygenase enzyme, which is essential for the production of prostaglandins involved in mucosal protection of the gastrointestinal tract. Without these protective prostaglandins, the stomach lining becomes more susceptible to damage from gastric acid, leading to potential ulcer formation and bleeding. Patients with a history of coronary artery disease may be on aspirin for secondary prevention, and it is crucial to monitor for signs of bleeding such as black, tarry stools or abdominal pain. The benefits of aspirin in preventing cardiovascular events need to be weighed against the risk of adverse effects like gastrointestinal bleeding, especially in patients on long-term therapy.

Correct Answer: A

Rationale: The nurse should monitor serum potassium levels closely during ACE inhibitor therapy because ACE inhibitors can lead to an increase in serum potassium levels, known as hyperkalemia. ACE inhibitors block the conversion of angiotensin I to angiotensin II, which in turn decreases aldosterone secretion. Aldosterone normally acts in the kidneys to reabsorb sodium and water and excrete potassium. Therefore, when aldosterone secretion is decreased due to ACE inhibitor therapy, there can be an increase in potassium retention, potentially leading to hyperkalemia. Monitoring serum potassium levels is essential to prevent complications associated with hyperkalemia, such as cardiac arrhythmias.

Correct Answer: A

Rationale: The correct practice in this situation would be to have a dedicated fire extinguisher in every strategic location throughout the hospital. Having fire extinguishers readily available in key areas ensures that they can be accessed quickly in case of a fire emergency. Placing one fire extinguisher between two units may not be sufficient as it may not be easily accessible in the event of a fire. Fire extinguishers should not be replaced with fire sensors as these serve different functions. Additionally, borrowing fire extinguishers may not be a safe or reliable practice, as they should be properly maintained and placed according to safety standards. Therefore, having dedicated fire extinguishers in every strategic location is the best practice to ensure the safety and well-being of individuals in the hospital.

Correct Answer: D

Rationale: Pelvic ultrasound can detect fetal congenital defects, placenta previa, and fetal lung maturity.

Correct Answer: A

Rationale: The clinical presentation of fatigue, pallor, exertional dyspnea along with the laboratory findings of severe anemia, low serum iron, low transferrin saturation, and elevated TIBC are consistent with iron deficiency anemia. In iron deficiency anemia, there is inadequate iron available for erythropoiesis leading to microcytic hypochromic anemia. The low serum iron and transferrin saturation, along with the elevated TIBC, indicate decreased iron stores and increased iron-binding capacity as the body tries to compensate for the deficiency by increasing absorption and recycling of iron. Anemia of chronic disease typically presents with mild to moderate anemia, normal to low TIBC, and low transferrin saturation due to iron sequestration in macrophages. Sideroblastic anemia usually has elevated serum iron, high saturation, and normal to low TIBC. Thalassemia presents with microcytic hyp