Correct Answer: A

Rationale: The most crucial nursing action for a patient post-surgery is to monitor vital signs. Monitoring vital signs helps in detecting early signs of complications such as hemorrhage, shock, or infection. While monitoring the surgical site is important for assessing wound healing and signs of infection, it is secondary to monitoring vital signs. Checking blood pressure and oxygen saturation are also important, but they are components of monitoring vital signs.

Correct Answer: D

Rationale: The correct answer is to monitor the insertion site for redness. This intervention helps detect signs of infection early in clients with intraventricular catheters. Keeping the head of the bed elevated to 30 degrees is important for managing intracranial pressure but does not directly reduce the risk of infection. Administering IV antibiotics prophylactically is not recommended as a routine practice due to the risk of antibiotic resistance and should only be done based on culture results. Changing the catheter insertion site every 24 hours is unnecessary and increases the risk of introducing new pathogens.

Correct Answer: A

Rationale: The correct answer is A: Monitor INR. INR (International Normalized Ratio) is crucial for monitoring warfarin therapy as it helps assess the therapeutic effectiveness and bleeding risks associated with the medication. INR measures the clotting tendency of blood, which is essential in determining the appropriate dosage of warfarin. Monitoring platelet count (B), sodium levels (C), or calcium levels (D) is not primarily used for assessing warfarin therapy. Platelet count is more relevant in assessing bleeding disorders, while sodium and calcium levels are typically monitored for different medical conditions unrelated to warfarin therapy.

Correct Answer: A

Rationale: The best position for a patient in respiratory distress is the Semi-Fowler's position. This position promotes lung expansion and eases breathing by allowing the chest to expand more fully. The Trendelenburg position (choice B) where the patient's feet are higher than the head is not recommended in respiratory distress as it may cause increased pressure on the chest and reduced lung expansion. The prone position (choice C) lying on the stomach is also not optimal for respiratory distress as it can further compromise breathing. The supine position (choice D) lying flat on the back is not ideal as it may impair breathing by restricting chest expansion.

Correct Answer: A

Rationale: Naloxone is the correct answer. Naloxone is the standard medication for reversing opioid overdose by blocking opioid receptors. Choice B, Epinephrine, is used to treat severe allergic reactions (anaphylaxis) and cardiac arrest, not opioid overdose. Choice C, Lidocaine, is a local anesthetic used for numbing purposes and managing certain types of arrhythmias, not for opioid overdose. Choice D, Atropine, is used to treat bradycardia, organophosphate poisoning, and nerve agent toxicity, not opioid overdose.