Correct Answer: A

Rationale: The nurse plays a crucial role in preoperative patient care by providing education and ensuring NPO (nothing by mouth) status. This helps prepare the patient for surgery by ensuring they understand the procedure, what to expect, and also by following necessary preoperative fasting guidelines. While obtaining the patient's health history (choice C) is important for overall patient assessment, it is typically done during the preoperative assessment but does not specifically pertain to the nurse's role. Ensuring informed consent (choice B) is primarily the responsibility of the healthcare provider performing the procedure. Confirming the patient's surgical site (choice D) is usually the responsibility of the surgical team and is done immediately before the surgery to prevent errors.

Correct Answer: A

Rationale: The correct answer is to ensure the blood is compatible with the recipient's blood type. This is crucial to prevent transfusion reactions, which can be life-threatening. Choice B is incorrect because warming blood to body temperature is not a standard practice and may lead to hemolysis. Choice C is incorrect as blood products are carefully screened for clots before distribution. Choice D is incorrect because it is not necessary for the recipient to eat before a blood transfusion.

Correct Answer: B

Rationale: Assessing the client's gait for steadiness is the most appropriate action to ensure the safety of a client with dementia while walking. This allows the nurse to identify any issues that may increase the risk of falls or accidents. Administering PRN haloperidol or lorazepam is not indicated as the first-line approach in managing wandering behavior and can have adverse effects like increased risk of falls, confusion, or oversedation. Restraint use should be avoided whenever possible, as it can lead to physical and psychological harm to the client.

Correct Answer: A

Rationale: The correct answer is A: 'Sweating and trembling.' These are classic early signs of hypoglycemia in a diabetic patient. Sweating occurs due to the activation of the sympathetic nervous system in response to low blood sugar levels, while trembling is a result of the body's attempt to increase muscle activity to raise blood sugar levels. Confusion and irritability (Choice B) are more advanced signs of hypoglycemia that occur if the condition is not treated promptly. Dizziness and increased heart rate (Choice C) can also occur but are not as specific and early as sweating and trembling. Nausea and vomiting (Choice D) are more commonly associated with other conditions or severe hypoglycemia, rather than being early signs.

Correct Answer: A

Rationale: The signs of opioid withdrawal typically include sweating and nausea. The correct management approach involves administering methadone to alleviate the symptoms. Choice B is incorrect because naloxone is used to reverse opioid overdose, not for managing withdrawal symptoms. Choice C is incorrect as buprenorphine is typically used to treat opioid addiction, not just withdrawal symptoms. Choice D is incorrect as sedatives are not the primary treatment for opioid withdrawal.