Correct Answer: A

Rationale: The correct answer is A: PT and INR. Warfarin is an anticoagulant that affects the clotting mechanism by inhibiting vitamin K-dependent clotting factors. The PT (Prothrombin Time) and INR (International Normalized Ratio) are specific laboratory values used to monitor the effectiveness and safety of warfarin therapy. These values help healthcare providers adjust the warfarin dosage to maintain the desired level of anticoagulation. Choices B, C, and D are incorrect because blood glucose levels, complete blood count (CBC), and platelet count are not directly monitored to assess the effects of warfarin therapy.

Correct Answer: B

Rationale: The correct first action the nurse should take when preparing to administer a blood transfusion is to verify the blood type and crossmatch. This step is crucial to ensure compatibility and prevent transfusion reactions. Obtaining the client's consent is important but should follow the verification process. Taking baseline vital signs is necessary before starting the transfusion, but confirming compatibility takes precedence. Priming the IV with normal saline is a step done before starting the transfusion, after ensuring blood compatibility.

Correct Answer: A

Rationale: The correct answer is A. Trazodone can cause sedation, so clients should be cautioned about activities requiring alertness, like driving. Choice B is incorrect because trazodone is not a stimulant; it is actually a sedating antidepressant. Choice C is incorrect as all medications have potential side effects. Choice D is not specifically indicated for trazodone; the client should follow the prescribing healthcare provider's instructions regarding food intake.

Correct Answer: B

Rationale: During a seizure, the priority action for the nurse is to place the client on their side with their head forward. This position helps maintain an open airway and prevents aspiration of fluids or secretions. Restraint should never be used during a seizure as it can cause harm to the client. Performing a neurological assessment is important but not the immediate priority during an active seizure. While monitoring vitals is essential, ensuring the client's airway is clear takes precedence.

Correct Answer: A

Rationale: Corrected Rationale: Atorvastatin, an HMG CoA reductase inhibitor, can lead to hepatotoxicity. Therefore, monitoring liver function through regular tests is essential. Baseline liver function should be assessed, followed by tests at 12 weeks after starting therapy and periodically thereafter. This monitoring helps detect early signs of liver damage, including jaundice, nausea, and dark urine. Incorrect Choices Rationale: B) Renal function test is not directly affected by atorvastatin. C) Hearing screenings and D) Visual acuity screenings are not indicated for monitoring while on atorvastatin therapy.