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: Hypotension is a common adverse effect of morphine due to its vasodilatory properties. It can lead to a drop in blood pressure, which should be closely monitored during administration. Diarrhea (Choice A) is not a typical adverse effect of morphine. Urinary retention (Choice B) is a side effect of morphine due to its impact on the bladder muscles, but it is not classified as an adverse effect. Bradycardia (Choice D) is not a common adverse effect of morphine; instead, it tends to cause tachycardia.

Correct Answer: B

Rationale: The correct answer is to change the TPN tubing every 24 hours. This action helps reduce the risk of infection because the high glucose content of TPN promotes bacterial growth. Choice A is incorrect as changing the tubing every 48 hours would not provide adequate infection prevention. Option C, monitoring urine output, is important for assessing renal function but is not directly related to preventing TPN-related infections. Option D, monitoring weight, is essential for assessing nutritional status but does not directly address infection prevention in TPN administration.

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: D

Rationale: Placing a pillow under the client's lower legs is the correct intervention because it helps prevent pressure on the incision site and promotes circulation. Elevating the lower legs also aids in reducing swelling and improving blood flow. Applying heat to the incision site (Choice A) is contraindicated in the early postoperative period as it can increase inflammation and the risk of infection. Keeping the client's knee flexed while in bed (Choice B) may lead to contractures or limited extension of the knee joint. Placing a pillow under the client's knee (Choice C) may cause hyperextension of the knee, which is also not recommended post knee arthroplasty.