Correct Answer: C

Rationale: The correct answer is to instruct the client to use a disposable mask when in contact with others. TB is highly contagious, and wearing a mask can help prevent the spread of the disease to others. Choice A is important but not the priority as using a mask directly impacts public health. Choice B is related to a potential side effect of isoniazid, peripheral neuropathy, but immediate healthcare provider notification is not required. Choice D is relevant due to the potential hepatotoxicity of isoniazid and rifampin, but it is not the priority instruction in this scenario.

Correct Answer: B

Rationale: The correct first action when a client receiving a blood transfusion develops a fever is to stop the transfusion and notify the healthcare provider. This is crucial to prevent further reactions and ensure prompt intervention. Administering an antipyretic (Choice A) may mask symptoms and delay appropriate treatment. Slowing the rate of the transfusion (Choice C) might not address the underlying cause of the fever. Continuing the transfusion and reassessing in 15 minutes (Choice D) could worsen the client's condition if there is a severe reaction occurring.

Correct Answer: C

Rationale: The correct answer is C, 'Diminished breath sounds bilaterally.' This finding should be reported immediately as it could indicate a serious complication such as increased intracranial pressure or respiratory compromise. In a post-craniotomy client, changes in breath sounds may be a sign of developing issues that need prompt intervention. Choices A, B, and D are not as critical in the immediate post-craniotomy period. Pupils equal and reactive to light are expected findings, a sudden increase in urine output may require monitoring but not immediate reporting, and a small increase in blood pressure may not be alarming unless it is significantly high or accompanied by other concerning signs.

Correct Answer: C

Rationale: The correct answer is C: 'NPO reduces the risk of aspiration during surgery.' When a client is NPO (nothing by mouth) before surgery, it is to prevent aspiration, which can lead to serious complications such as pneumonia. Choice A is incorrect because being NPO is more about preventing aspiration than nausea. Choice B is a general statement without specifying the reason for being NPO. Choice D is partially correct but does not emphasize the crucial aspect of preventing aspiration, which is the primary reason for fasting before surgery.

Correct Answer: B

Rationale: The correct answer is B: Decreased fatigue and improved energy levels. Levothyroxine is a medication used to treat hypothyroidism by providing the body with the thyroid hormone it lacks. Therefore, a positive response to the medication would manifest as decreased fatigue and improved energy levels due to the correction of the thyroid hormone imbalance. Choices A, C, and D are incorrect because improved tolerance to cold, reduced anxiety, and increased sensitivity to heat are not direct indicators of the effectiveness of levothyroxine in managing hypothyroidism.