Correct Answer: B

Rationale: The correct answer is B: Lowered cholesterol levels. Atorvastatin is a medication commonly prescribed to lower cholesterol levels, which is crucial in reducing the risk of further cardiovascular events, including myocardial infarction (MI). Monitoring cholesterol levels is essential to assess the effectiveness of atorvastatin therapy and its role in preventing future cardiac complications. Choices A, C, and D are incorrect because increased blood pressure, decreased heart rate, and improved liver function are not direct indicators of atorvastatin's effectiveness in a client with a history of MI.

Correct Answer: B

Rationale: An LDL level of 200 mg/dL is significantly elevated and requires immediate intervention to reduce the risk of cardiovascular events in a client with coronary artery disease (CAD). High LDL levels contribute to the development and progression of atherosclerosis, which can lead to complications like heart attacks and strokes. Lowering LDL levels is a key goal in managing CAD and preventing further cardiovascular damage. Total cholesterol of 180 mg/dL, triglycerides of 150 mg/dL, and HDL of 40 mg/dL are within acceptable ranges and do not pose an immediate risk that necessitates urgent intervention.

Correct Answer: B

Rationale: Nausea is a common side effect of levodopa-carbidopa (Sinemet). Consuming a low-protein snack with the medication can help reduce nausea. The protein in food can compete with levodopa for absorption, so taking it with a low-protein snack may improve its effectiveness and reduce gastrointestinal side effects. Option A is incorrect as taking the medication on an empty stomach may exacerbate nausea. Option C is incorrect because increasing intake of dairy products is not recommended to alleviate nausea. Option D is incorrect because abruptly stopping the medication without healthcare provider guidance can lead to adverse effects.

Correct Answer: A

Rationale: The correct first action for a client presenting with confusion, sweating, and palpitations, suggestive of hypoglycemia, is to check the client's blood glucose level. This step helps to confirm if the symptoms are due to low blood sugar levels and guides appropriate interventions. Administering insulin without knowing the current blood glucose level can be dangerous and is not recommended as the initial step. Offering a high-protein snack may be necessary after confirming hypoglycemia, but checking the blood glucose level takes precedence. Measuring blood pressure is not the priority in this situation; addressing hypoglycemia is the immediate concern.

Correct Answer: A

Rationale: Continuous bubbling in the water seal chamber indicates an air leak, which requires immediate intervention to prevent complications such as pneumothorax. An air leak can lead to ineffective lung expansion, respiratory distress, and compromised gas exchange. Therefore, prompt action is necessary to maintain the integrity of the closed drainage system and prevent further complications. Choices B, C, and D are incorrect because serosanguineous drainage is an expected finding post-thoracotomy, intermittent bubbling in the suction control chamber is normal, and having the chest tube secured to the client's chest wall is essential for stability and proper functioning.