Correct Answer: C

Rationale: The correct answer is C: 'Support your weight on your hands.' When using crutches, it is important to support your weight on your hands rather than underarms to prevent injury to the axillary nerves and blood vessels. Placing weight on the underarms can lead to nerve damage and circulatory issues. Choices A, B, and D are incorrect. Keeping the elbows extended when walking is important for stability, holding the crutches slightly in front of you allows for proper balance, and supporting weight on the hands maintains the correct weight-bearing position.

Correct Answer: B

Rationale: The correct intervention for a client experiencing alcohol withdrawal is to administer lorazepam. Lorazepam, a benzodiazepine, is commonly used to manage the symptoms of alcohol withdrawal by preventing seizures and reducing agitation and anxiety. Encouraging frequent ambulation (choice A) may not be safe during alcohol withdrawal due to potential instability and confusion. Providing a low-calorie diet (choice C) is not a priority during alcohol withdrawal, as the focus is on managing withdrawal symptoms. Administering insulin as prescribed (choice D) is unrelated to managing alcohol withdrawal symptoms.

Correct Answer: B

Rationale: The correct answer is B: Hyperkalemia. Enalapril, an ACE inhibitor, can lead to hyperkalemia by reducing aldosterone levels, which results in potassium retention. Bradycardia (Choice A) is not a common adverse effect of enalapril. Hyperglycemia (Choice C) and tinnitus (Choice D) are also not typically associated with enalapril use.

Correct Answer: B

Rationale: A PaCO2 level of 55 mm Hg indicates hypercapnia, which is common in clients with emphysema but may require further treatment if it leads to respiratory acidosis or distress. Elevated PaCO2 levels can indicate inadequate ventilation and impaired gas exchange, potentially leading to respiratory acidosis. The other results fall within normal ranges or compensated values for a client with chronic emphysema and do not necessarily indicate the need for immediate intervention.

Correct Answer: D

Rationale: The correct answer is to leave one side rail up on the client's bed. This action can help prevent falls while allowing the client to get up safely when needed, reducing the risk of injury from wandering. Placing the client in seclusion (Choice A) is not appropriate as it can lead to increased agitation and distress. Requesting restraints (Choice B) should be avoided as it can increase the risk of injuries and is not recommended for clients with Alzheimer's. Dimming the lighting (Choice C) may increase confusion and disorientation in clients with Alzheimer's disease.