Correct Answer: B

Rationale: The correct intervention to reduce the risk of deep vein thrombosis (DVT) after surgery is to use compression stockings. Compression stockings help prevent DVT by promoting venous return, which reduces the likelihood of blood pooling in the legs and forming clots. Choices A, C, and D are incorrect because avoiding ambulation can actually increase the risk of DVT, using a heating pad does not directly address DVT prevention, and elevating the client's legs on a pillow alone may not provide sufficient compression to prevent DVT.

Correct Answer: A

Rationale: The correct instruction the nurse should include to improve oxygenation for a client with COPD is to 'Use pursed-lip breathing during activities.' Pursed-lip breathing helps improve oxygenation by slowing down the respiratory rate, reducing the work of breathing, and keeping the airways open. This technique also helps prevent the collapse of small airways during exhalation, allowing for more complete emptying of the lungs. Choices B, C, and D are incorrect because deep breathing exercises after meals, diaphragmatic breathing during exercise, and breathing in short, shallow breaths do not specifically target the improvement of oxygenation in individuals with COPD.

Correct Answer: B

Rationale: The correct answer is B: Eye contact, personal space, and touch are cultural variables that can influence healthcare interactions. These factors vary across cultures and can impact how individuals perceive communication and interactions. Choices A, C, and D include elements that are not specifically cultural variables affecting communication and interactions in the same way as eye contact, personal space, and touch.

Correct Answer: B

Rationale: The correct answer is B: 'Avoid smoking and open flames near oxygen.' This information is crucial to prevent fire hazards when using home oxygen therapy. Smoking and open flames near oxygen can lead to serious accidents. Choice A is incorrect because increasing the oxygen flow rate during activity without healthcare provider guidance can be dangerous. Choice C is incorrect as oxygen tanks should be stored in a well-ventilated area, not necessarily warm and dry. Choice D is incorrect as oxygen should not be turned off and on by the client, as it can affect the therapy's effectiveness and cause safety issues.

Correct Answer: B

Rationale: The correct answer is to increase fluid intake to 2 liters per day. Adequate fluid intake helps manage hypertension and prevent fluid retention. Limiting sodium intake, avoiding potassium-rich foods, and abstaining from alcohol are important aspects of managing hypertension; however, in this scenario, emphasizing the increase in fluid intake is crucial for the client's understanding and compliance.