A nurse is caring for a client who is taking clopidogrel to prevent stent restenosis. The nurse should monitor the client for which of the following adverse reactions?

Correct Answer: D

Rationale: The correct answer is D: Thrombocytopenia. Clopidogrel is an antiplatelet medication that works by preventing blood clots. Thrombocytopenia is a decrease in platelet count, which can lead to bleeding issues. Monitoring for thrombocytopenia is essential as it can be a potential adverse reaction of clopidogrel. A: Hyperuricemia is not typically associated with clopidogrel. B: Hyponatremia is not a common adverse reaction of clopidogrel. C: Lymphocytopenia is not a common side effect of clopidogrel. In summary, the nurse should monitor for thrombocytopenia as a potential adverse reaction when caring for a client taking clopidogrel.

Correct Answer: D

Rationale: The correct answer is D: Inhibiting cyclooxygenase action in platelets. Aspirin works by irreversibly inhibiting cyclooxygenase, specifically COX-1, in platelets. By inhibiting COX-1, aspirin prevents the formation of thromboxane A2, which is a potent platelet aggregator. This action reduces platelet aggregation and ultimately decreases the risk of clot formation leading to a cardiovascular event. Choice A is incorrect because aspirin does not activate thromboxane A2, but rather inhibits its formation. Choice B is incorrect as aspirin does not block adenosine diphosphate receptors. Choice C is incorrect as aspirin does not suppress specific clotting factors, but rather inhibits platelet function through the mechanism described above.

Correct Answer: C

Rationale: Normocytic normochromic anemia is characterized by normal-sized red blood cells with normal hemoglobin content. Pregnancy is associated with increased blood volume and physiological hemodilution, leading to normocytic normochromic anemia. Iron deficiency (choice A) typically presents as microcytic hypochromic anemia. Primaquine (choice B) is associated with hemolytic anemia. Sickle cell disease (choice D) is characterized by sickle-shaped red blood cells and is associated with hemolytic anemia, making it different from normocytic normochromic anemia.

Correct Answer: D

Rationale: In microcytic hypochromic anemia, red cells are smaller with decreased hemoglobin content, leading to pale appearance. Choice D is correct as it describes the typical characteristics of microcytic hypochromic anemia. Choice A is incorrect as red cells are smaller, not larger. Choice B is incorrect as red blood cell count is usually decreased. Choice C is incorrect as both hematocrit and mean corpuscular hemoglobin are decreased in microcytic hypochromic anemia.

Correct Answer: B

Rationale: Platelets are responsible for clot formation in the body. When a wound occurs, platelets are activated and adhere to the site, forming a plug to stop bleeding. They release chemicals to further enhance clot formation. Plasma is the liquid component of blood, red blood cells carry oxygen, and white blood cells are part of the immune system, none of which are directly involved in clot formation.