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: B

Rationale: The Partial Thromboplastin Time (PTT) is the correct laboratory value to monitor heparin therapy. PTT measures the time it takes for blood to clot and is specifically used to evaluate the effectiveness of anticoagulation therapy such as heparin. Monitoring the PTT helps ensure that the heparin dose is within the therapeutic range. Platelet count, Prothrombin time (PT), and Bleeding time are not specific laboratory values for monitoring the therapeutic effect of heparin therapy. Platelet count is more indicative of platelet function, PT is used to monitor warfarin therapy, and Bleeding time assesses platelet function rather than the effect of heparin therapy.

Correct Answer: B

Rationale: The correct recommendation to reduce the risk of coronary artery disease is to exercise for at least 150 minutes per week. Regular exercise is crucial in maintaining cardiovascular health and reducing the chances of developing heart disease. Increasing intake of saturated fats (Choice A) is counterproductive as it can raise cholesterol levels and contribute to arterial plaque formation. Taking iron supplements daily (Choice C) is not directly related to reducing the risk of coronary artery disease. Limiting fruits and vegetables in the diet (Choice D) is also not advisable, as they are essential components of a heart-healthy diet due to their high fiber and nutrient content.

Correct Answer: B

Rationale: The correct answer is to instruct the client to reduce potassium intake. Clients with chronic kidney disease should limit potassium intake to prevent hyperkalemia, as the kidneys may struggle to remove excess potassium. Increasing protein intake between dialysis sessions (Choice A) is not recommended as it can increase urea production, adding to the workload of the kidneys. Avoiding iron supplements (Choice C) is not necessary unless iron levels are high. Expecting weight gain after each dialysis session (Choice D) is incorrect as patients typically experience weight loss due to fluid removal during dialysis.

Correct Answer: B

Rationale: The correct answer is B. Radiating pain, especially to the left arm, is a classic sign of myocardial infarction. Pain that radiates to the left arm indicates cardiac involvement, making it a significant finding. Choices A, C, and D are incorrect because chest pain that improves with rest, worsens with deep breathing, or is relieved by antacids is less likely to be associated with a myocardial infarction.