Correct Answer: C

Rationale: The correct answer is to provide standby assistance when the client gets out of bed. Lisinopril can cause hypotension, especially after the first dose, which can lead to dizziness and falls. Standby assistance helps prevent potential injury. Placing the client on cardiac monitoring (choice A) or monitoring oxygen saturation (choice B) are not typically necessary after the first dose of lisinopril unless specific symptoms are present. Encouraging foods high in potassium (choice D) is not directly related to the immediate concern of postural hypotension associated with lisinopril.

Correct Answer: C

Rationale: The correct answer is C. This statement indicates understanding because the client recognizes that they should use the PCA pump when they start to feel pain. Waiting for the pain to become severe is not recommended as it may lead to inadequate pain control. Option B is incorrect because only the client should control the PCA pump to ensure safety and appropriate dosing. Option D is also incorrect as there is no set limit on how often the button can be pressed, as it should be used as needed when pain is felt.

Correct Answer: D

Rationale: The correct answer is to elevate the affected leg while in bed. Elevating the leg helps reduce swelling and promotes venous return, aiding in the management of DVT. Positioning the affected leg below the heart can worsen the condition by increasing the risk of clot dislodgment. Massaging the affected extremity can also dislodge the clot and should be avoided. Cold compresses are not recommended as they can cause vasoconstriction, potentially worsening the condition.

Correct Answer: B

Rationale: Monitoring oxygen saturation levels is the most important intervention in this scenario. It ensures that the client is receiving adequate oxygenation, which is crucial for a client with pneumonia. By monitoring saturation levels, the nurse can promptly identify any oxygenation issues and adjust the oxygen delivery if necessary. Encouraging fluid intake, changing oxygen tubing daily, and assisting with frequent position changes are also important aspects of care for a client with pneumonia, but they are not as critical as monitoring oxygen saturation levels in ensuring immediate respiratory support.

Correct Answer: B

Rationale: To ensure proper functioning of a chest tube, the nurse should keep the drainage system below chest level. This position allows for proper drainage by gravity and prevents backflow into the pleural space. Clamping the chest tube intermittently can lead to a buildup of pressure and should be avoided. Emptying the drainage chamber every 4 hours is important but not directly related to maintaining the chest tube's function. Applying sterile gauze around the insertion site daily is essential for infection prevention but does not specifically ensure the proper functioning of the chest tube.