Correct Answer: B

Rationale: Corrected Rationale: Low prealbumin levels are indicative of malnutrition, which is common in individuals with anorexia nervosa. Iron levels, serum creatinine, and calcium levels are not typically affected in the same way by anorexia nervosa, making choices A, C, and D incorrect.

Correct Answer: A

Rationale: The correct answer is A: Hypertension, high cholesterol, and smoking are major risk factors for stroke. These factors contribute to the development of atherosclerosis, which can lead to a stroke. While obesity and lack of exercise are risk factors for cardiovascular diseases, they are not as directly linked to stroke as hypertension, high cholesterol, and smoking. Family history of cardiovascular disease may increase the overall risk of heart problems, but it is not as specific to stroke as the factors listed in option A. Age and gender can influence the risk of stroke, but they are not modifiable risk factors like hypertension, high cholesterol, and smoking, which can be reduced through lifestyle changes.

Correct Answer: A

Rationale: The correct answer is to check for air leaks in the tubing every 4 hours when caring for a client with a chest tube. This responsibility is crucial because it ensures proper chest tube function and helps prevent complications such as pneumothorax or hemothorax. Clamping the chest tube (Choice B) can lead to serious issues by causing a tension pneumothorax. Encouraging deep breathing and coughing (Choice C) is important for respiratory hygiene but is not directly related to chest tube care. Keeping the client in a high Fowler's position (Choice D) may be beneficial for some conditions but is not specific to chest tube management.

Correct Answer: D

Rationale: The correct answer is to change the appliance twice each week. Changing the appliance too frequently can irritate the skin around the stoma, while not changing it often enough can lead to infection. Changing the appliance twice a week helps to maintain hygiene without causing irritation. Choices A, B, and C are incorrect because changing the appliance daily can cause irritation, cleaning the stoma once a day may not be sufficient for proper hygiene, and avoiding changing the appliance for a week can increase the risk of infection and skin breakdown.

Correct Answer: D

Rationale: All of the above options are essential in preventing deep vein thrombosis (DVT) in post-operative patients. Encouraging early ambulation helps prevent blood stasis in the lower extremities, reducing the risk of DVT. Administering anticoagulants can prevent blood clots from forming. Compression stockings promote blood flow, reducing the likelihood of clot formation. Each intervention plays a crucial role in DVT prevention, making the correct answer 'All of the above.' Choices A, B, and C are not exclusive of each other but rather work synergistically to provide comprehensive prevention against DVT.