This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Recognize signs of digoxin toxicity
Prompt focus: A registered nurse is caring for a patient taking digoxin who reports nausea, visual changes described as yellow halos around lights, and a heart rate of 48 beats per minute. Which laboratory value should the nurse check first?
Why the correct answer works
Serum potassium
Hypokalemia increases the risk of digoxin toxicity, so potassium is the priority laboratory value to check.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
Nausea, yellow visual halos, and bradycardia suggest digoxin toxicity. Low potassium increases the risk of digoxin toxicity, so the potassium level should be checked promptly.
Simple analogy
Think of recognize signs of digoxin toxicity like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.