Correct Answer: C

Rationale: The correct action the nurse should take when administering vancomycin IV is to assess the IV site for infiltration during administration. Vancomycin is known to cause tissue damage if it infiltrates, making close monitoring crucial. Administering the medication over 30 minutes (Choice A) is a common practice but not the priority in preventing infiltration. Monitoring for a decrease in blood pressure (Choice B) is not directly related to vancomycin administration. Premedicating with an antiemetic (Choice D) is not typically required for vancomycin administration.

Correct Answer: D

Rationale: The correct answer is D: a low WBC count. Clozapine can suppress bone marrow function, leading to a decreased white blood cell count. This condition, known as agranulocytosis, increases the risk of severe infections. Monitoring WBC counts is essential during clozapine therapy. Choices A, B, and C are within normal ranges and are not contraindications for administering clozapine.

Correct Answer: C

Rationale: The correct action for the nurse to take while caring for a newborn with jaundice receiving phototherapy is to ensure that the newborn wears a diaper. This is essential to prevent skin irritation during phototherapy. Feeding the infant glucose water or applying lotion are not pertinent to managing jaundice or phototherapy. Keeping the infant's head covered with a cap is also not necessary for this specific situation.

Correct Answer: B

Rationale: The correct answer is B: Consume foods high in fiber and low in fat. Following a colon resection and a new colostomy, a high-fiber, low-fat diet is recommended to promote healing and reduce the risk of complications. Foods high in fiber help maintain bowel regularity and prevent constipation, which is crucial after this type of surgery. Choices A, C, and D are incorrect because avoiding foods high in protein, consuming foods high in vitamin C, or avoiding all raw vegetables are not the most appropriate dietary advice in this situation.

Correct Answer: D

Rationale: The correct answer is D: Decreased deep tendon reflexes. In myasthenia gravis, muscle weakness is a common manifestation, leading to decreased deep tendon reflexes. Bradycardia (choice A) is not typically associated with myasthenia gravis. Increased muscle strength (choice B) is unlikely as muscle weakness is a hallmark of this condition. Diarrhea (choice C) is not a typical finding in myasthenia gravis.