Correct Answer: A

Rationale: The correct answer is A: Decerebrate posturing. Decerebrate posturing is an abnormal body posture characterized by rigid extension of the arms and legs, which indicates severe brainstem injury affecting the midbrain and pons. This posture suggests dysfunction or damage to neural pathways controlling muscle tone. Choice B, hypervigilance, is not typically associated with brainstem injury but rather with increased alertness and arousal. Choice C, absence of deep tendon reflexes, is not a specific finding related to brainstem injury. Choice D, a Glasgow Coma Scale score of 15, indicates a fully awake and alert state, which is not expected in a client with a brainstem injury.

Correct Answer: D

Rationale: The correct answer is D. An HbA1c level less than 7% indicates good long-term glucose control for clients with diabetes. This goal reflects optimal glycemic control and reduces the risk of long-term complications. Choices A, B, and C are incorrect because they do not represent appropriate goals for managing type 1 diabetes in an adolescent. An HbA1c level greater than 8% (choice A) signifies poor glucose control, while a blood glucose level greater than 200 mg/dL at bedtime (choice B) and a blood glucose level less than 60 mg/dL before breakfast (choice C) are not within the target ranges for safe and effective diabetes management.

Correct Answer: A

Rationale: The correct answer is A: Immobility and decreased lung function. Older adults with immobility and decreased lung function are at a higher risk of developing pneumonia. Immobility can lead to decreased lung expansion and impaired clearance of secretions, predisposing to pneumonia. While poor hygiene, aspiration, use of respiratory equipment, medications, poor nutritional status, and compromised immune system can also contribute to pneumonia risk, they are not as directly associated with pneumonia in older adults as immobility and decreased lung function.

Correct Answer: C

Rationale: Placing a pillow between the legs is essential post-total hip arthroplasty to prevent adduction of the hip joint, reducing the risk of dislocation. Choices A, B, and D are incorrect. Using a walker while walking is encouraged for support and stability. Keeping the hip flexed at 90° while sitting can increase the risk of hip dislocation. Crossing legs at the ankles when sitting may also lead to hip dislocation.

Correct Answer: D

Rationale: All of these interventions are crucial in reducing the risk of falls in elderly patients. Encouraging the use of assistive devices helps provide support and stability, clearing walkways minimizes tripping hazards, and ensuring proper lighting enhances visibility and reduces the chances of falls. Therefore, choosing 'All of the above' is the most appropriate answer as each intervention plays a significant role in fall prevention.