Correct Answer: C

Rationale: The correct answer is C: "You may feel a burning sensation when the dye is injected." This is important preprocedure teaching for carotid angiography because it prepares the patient for a common sensation during the procedure, helping to manage their expectations and reduce anxiety. This information is crucial for informed consent. Choice A is incorrect because carotid angiography is usually done under local anesthesia, not general anesthesia. Choice B is incorrect as carotid angiography typically takes about 1-2 hours, not several hours. Choice D is incorrect because all medical procedures, including carotid angiography, carry potential risks and complications, which should be discussed with the patient.

Correct Answer: C

Rationale: The correct answer is C: Bronchospasm. Antiplatelet drugs commonly cause hypersensitivity reactions like bronchospasm due to their effects on platelet function. They can trigger an allergic response leading to bronchoconstriction. Difficulty hearing (A) is not a common hypersensitivity reaction to antiplatelet therapy. Confusion (B) is more commonly associated with central nervous system effects rather than hypersensitivity reactions. Agranulocytosis (D) is a severe drop in white blood cells and is not typically a hypersensitivity reaction to antiplatelet drugs.

Correct Answer: C

Rationale: The correct answer is C: Serum calcitonin level. Smoking can elevate serum calcitonin levels due to the effect of nicotine. However, an elevated serum calcitonin level is not a general indicator of cancer. Step 1: Understand that smoking can increase serum calcitonin levels. Step 2: Recognize that elevated serum calcitonin levels are not specific to cancer and can be influenced by other factors. Step 3: Differentiate between a marker that is specific to cancer (such as carcinoembryonic antigen) and one that can be affected by smoking but not necessarily indicative of cancer (serum calcitonin). Thus, while smoking can elevate serum calcitonin levels, it is not a reliable indicator of cancer.

Correct Answer: A

Rationale: The correct answer is A: Oxygen saturation above 90%. This is a discharge criterion because adequate oxygen saturation indicates the patient is breathing well and there is no immediate respiratory compromise. Oxygen saturation below 90% (choice C) would indicate hypoxemia and would not be safe for discharge. IV narcotics given less than 15 minutes ago (choice B) can still be in effect and may impair the patient's ability to function post-surgery. IV narcotics given less than 30 minutes ago (choice D) is a longer timeframe but still not ideal for discharge as the effects of the narcotics may not have fully worn off.

Correct Answer: A

Rationale: The correct answer is A: A hemolytic reaction to mismatched blood. Chills, dyspnea, and urticaria are indicative of a hemolytic transfusion reaction, which occurs when the recipient's immune system attacks the donor's red blood cells. This can lead to various symptoms, including fever, chills, difficulty breathing, and hives. This type of reaction is most commonly seen with mismatched blood types. Option B (A hemolytic reaction to Rh-incompatible blood) is incorrect because Rh incompatibility typically leads to hemolytic disease of the newborn, not an immediate transfusion reaction. Option C (A hemolytic allergic reaction caused by bacterial contamination of donor blood) is incorrect as bacterial contamination would present with symptoms such as fever and sepsis, not chills, dyspnea, and urticaria. Option D (None of the above) is incorrect as the symptoms presented align with a hemolytic transfusion reaction.