Correct Answer: A

Rationale: The correct instruction to prevent bleeding complications in a client on anticoagulant therapy is to use a soft-bristle toothbrush and electric razor. These implements help reduce the risk of bleeding by being gentle on the skin and reducing the chances of cuts or abrasions that could lead to bleeding in individuals on anticoagulants.

Correct Answer: B

Rationale: Metoprolol is a beta-blocker commonly used in heart failure to reduce blood pressure. One of the common side effects of metoprolol is hypotension, which can lead to dizziness, lightheadedness, and even fainting. Therefore, monitoring for hypotension is essential to prevent adverse effects and ensure patient safety.

Correct Answer: B

Rationale: Before administering enalapril, an antihypertensive medication, the nurse should prioritize checking the client's blood pressure. Monitoring blood pressure helps ensure it is at an acceptable level before giving the medication, as enalapril can further lower blood pressure. This assessment is crucial in preventing potential hypotensive episodes and adverse effects associated with excessive blood pressure reduction.

Correct Answer: C

Rationale: Nausea is an early sign of theophylline toxicity. The nurse should closely monitor the client for this symptom as it can progress to more severe toxicity. Nausea can be a warning sign to prevent further complications and adjust the dosage as necessary.

Correct Answer: A

Rationale: Encouraging the client to cough and deep breathe every 1 to 2 hours is crucial post-CABG surgery to prevent respiratory complications, such as atelectasis and pneumonia. These actions help to expand lung volume, clear secretions, and prevent the collapse of alveoli.