Correct Answer: A

Rationale: The correct action for the nurse to take is to keep objects in the client's room in the same place. This helps individuals with vision loss navigate their environment more easily by creating a familiar and consistent layout. Choice B, ensuring high-wattage lighting, may not be suitable for all clients with vision loss and can cause discomfort or glare. Approaching the client from the side (Choice C) can startle them and is not recommended. Touching the client (Choice D) without warning may cause anxiety or distress, so it's important to announce presence verbally.

Correct Answer: C

Rationale: The correct answer is C: Decreased serum ammonia. Lactulose is prescribed to decrease serum ammonia levels in clients with cirrhosis and hepatic encephalopathy. By reducing serum ammonia, lactulose helps improve the mental status of these clients. Therefore, monitoring for decreased serum ammonia is crucial to assess the effectiveness of lactulose therapy. Choice A (Improved mental status) is indirectly related as it is the desired outcome of decreasing ammonia levels. Choices B (Increased urine output) and D (Decreased bilirubin levels) are not directly associated with the therapeutic effects of lactulose in cirrhosis and hepatic encephalopathy.

Correct Answer: B

Rationale: Keeping the client's legs elevated is the appropriate action to prevent venous thromboembolism following a total knee arthroplasty. Elevating the legs helps promote circulation and reduce the risk of blood clots. Placing a pillow under the client's knees may provide comfort but does not address the specific postoperative complication. Flexing the client's knee every 2 hours may be contraindicated as excessive movement can disrupt the surgical site. Applying heat to the operative knee is not recommended immediately postoperatively as it can increase swelling and discomfort.

Correct Answer: B

Rationale: The correct answer is B: Barley soup. Barley contains gluten, which is harmful to individuals with celiac disease. Therefore, the nurse should instruct the client to avoid barley-containing foods like barley soup. Choices A, C, and D are safe options for individuals with celiac disease as they do not contain gluten. Rice, cornbread, and potatoes are gluten-free and can be included in the client's diet.

Correct Answer: C

Rationale: After a total hip arthroplasty, it is crucial to prevent hip dislocation. Placing an abduction pillow between the client's legs helps maintain proper alignment and prevents the hip from dislocating. This position aids in keeping the hip in a neutral or slightly outwardly rotated position, reducing the risk of dislocation. Placing the client supine with a pillow between the legs (Choice A) or using a trochanter roll (Choice D) may not provide the same level of abduction and support needed to prevent hip dislocation. Placing a pillow under the client's knees (Choice B) does not provide the necessary support to maintain proper hip alignment in this situation.