Correct Answer: A

Rationale: The correct answer is A: Non-steroidal anti-inflammatory drugs (NSAIDs). When a client is on Coumadin therapy, NSAIDs should be avoided because they can increase the risk of bleeding due to their antiplatelet effects. Choices B, C, and D are incorrect. Cough medicines with guaifenesin, histamine blockers, and laxatives containing magnesium salts do not have a significant interaction with Coumadin therapy that would necessitate avoidance.

Correct Answer: B

Rationale: Corrected Hemoglobin and hematocrit levels should be monitored closely after blood transfusions to assess the effectiveness and identify any complications. Monitoring hemoglobin and hematocrit levels helps evaluate the patient's oxygen-carrying capacity and blood volume. While platelets are crucial for clotting, they are not typically affected immediately after a blood transfusion. White blood cell count monitoring is more relevant in assessing infection or immune response, not directly related to a blood transfusion. Bleeding time measures platelet function, which is not the primary concern immediately after a blood transfusion.

Correct Answer: D

Rationale: The correct answer is D. A baked potato is high in potassium and helps prevent digitalis toxicity by maintaining adequate potassium levels. While choices A, B, and C all contain some potassium, a baked potato is a more concentrated source of potassium compared to three apricots, a medium banana, or a naval orange. Therefore, the client should choose a baked potato to better meet the dietary needs for preventing digitalis toxicity.

Correct Answer: C

Rationale: The correct answer is C: 'Visitors should wash their hands before and after touching the client.' When a client is on contact precautions, it is essential for visitors to practice good hand hygiene to prevent the spread of infection. While wearing a mask and a gown might be necessary for healthcare providers, it is not typically required for visitors. Option B is incorrect because there are indeed special requirements for visitors on contact precautions, including practicing good hand hygiene. Option D is incomplete and does not provide any guidance on infection prevention measures.

Correct Answer: B

Rationale: The correct answer is B. Proper oral hygiene, including brushing and flossing carefully after every meal, is essential for children on phenytoin to prevent gingival hyperplasia, a common side effect. Choice A is incorrect because acne is not a common side effect of phenytoin and does not require immediate healthcare provider notification. Choice C is incorrect because vomiting or fever should not prompt skipping a dose without consulting the healthcare provider first. Choice D is incorrect because discontinuing phenytoin should never be done abruptly or without healthcare provider guidance, even if the child is seizure-free for 6 months.