Correct Answer: A

Rationale: The correct answer is to monitor INR levels for patients on warfarin therapy. INR monitoring is essential because it helps assess the clotting tendency of the blood and ensures that patients are within the therapeutic range to prevent both blood clots and excessive bleeding. Monitoring potassium levels (Choice B), sodium levels (Choice C), or platelet count (Choice D) is not specifically required for patients on warfarin therapy and does not directly impact the effectiveness or safety of the medication.

Correct Answer: B

Rationale: The most appropriate intervention for a patient with a suspected stroke is to perform a CT scan. A CT scan is crucial for diagnosing a stroke by visualizing any bleeding or blockages in the brain. Administering IV fluids (Choice A) may be necessary based on the patient's condition, but it is not the primary intervention for a suspected stroke. Performing a lumbar puncture (Choice C) is not indicated for stroke evaluation and may not provide relevant information. Administering anticoagulants (Choice D) is a treatment option for certain types of strokes but should be based on the CT scan results and specific guidelines.

Correct Answer: C

Rationale: The correct answer is C. A serum creatinine level of 2.8 mg/dL indicates impaired kidney function and should be reported to the healthcare provider. Elevated serum creatinine levels are indicative of decreased kidney function and potential progression of chronic kidney disease. Choices A, B, and D are within normal ranges and do not signify immediate concerns related to kidney disease. Urine output of 80 mL/hr is appropriate, a blood pressure of 140/90 mm Hg is considered prehypertensive but not acutely concerning, and a heart rate of 72/min falls within the normal range.

Correct Answer: C

Rationale: A respiratory rate of 12/min may indicate respiratory depression, a potential side effect of opioid analgesics. Respiratory depression can be a serious complication that requires immediate intervention. Monitoring the respiratory rate is crucial in clients receiving opioids to prevent adverse events. Oxygen saturation, blood pressure, and heart rate are important parameters to assess, but a low respiratory rate is a more critical finding that warrants immediate reporting to the healthcare provider.

Correct Answer: B

Rationale: The correct answer is B: "Exercise for 30 minutes at least 5 days a week." Regular exercise helps promote cardiovascular health and manage hypertension. Choice A is incorrect because increasing sodium intake is not recommended for hypertension. Choice C is incorrect because while sleep is important, excessive sleep duration is not typically part of hypertension management. Choice D is incorrect because fluid intake should be adequate unless advised otherwise by a healthcare provider.