Correct Answer: B

Rationale: Corrected Rationale: When caring for a patient on warfarin, monitoring prothrombin time (PT) is crucial. PT helps assess the blood's ability to clot properly, ensuring the patient maintains therapeutic anticoagulation levels while minimizing bleeding risks. Platelet count (Choice A) is important but not the most critical for warfarin therapy. Hemoglobin level (Choice C) and white blood cell count (Choice D) are not directly related to monitoring the effects of warfarin.

Correct Answer: B

Rationale: The correct pre-procedure instruction the nurse should provide to a client with chronic kidney disease (CKD) scheduled for a renal biopsy is to avoid taking anticoagulant medications for one week before the biopsy. This instruction is crucial to reduce the risk of bleeding during the procedure, as anticoagulants can increase the chance of bleeding complications. Choices A, C, and D are incorrect because maintaining a low-protein diet, drinking plenty of fluids, or taking routine medications with water are not specifically related to reducing the risk of bleeding associated with a renal biopsy in a client with CKD.

Correct Answer: D

Rationale: Both Brudzinski's sign and Kernig's sign are classic signs of meningeal irritation, commonly associated with meningitis. Brudzinski's sign is positive when flexing the neck causes involuntary flexion of the hips and knees due to irritation of the meninges. Kernig's sign is positive when there is pain and resistance with knee extension after hip flexion, indicating meningeal irritation or inflammation. The Babinski reflex, mentioned in choice B, is a test used to assess upper motor neuron damage and is not specific to meningitis. Therefore, choices A and C are the correct options as they are indicative of meningeal irritation in a suspected case of meningitis.

Correct Answer: B

Rationale: The best action for the nurse to take in this situation is to help the client directly contact the HMO to seek information about limitations of coverage. This approach addresses the client's immediate concerns and clarifies the situation, enabling the client to understand the coverage and potential outcomes regarding the bone marrow transplant. Choice A is not the best option as having the healthcare provider write a letter may not provide immediate clarification on coverage. Choice C is inappropriate as legal action should be considered as a last resort, and choice D involving the state board of insurance is not necessary at this initial stage of addressing the client's concern.

Correct Answer: C

Rationale: The correct instruction for a client prescribed levothyroxine (Synthroid) is to take the medication on an empty stomach. This ensures optimal absorption of levothyroxine. Taking it with a meal can interfere with absorption due to food interactions. Taking it at bedtime may lead to inconsistent absorption as it should be taken at the same time every day in the morning. Taking it with an antacid can reduce the absorption of levothyroxine, making it less effective.