Contrast safety: kidney function: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Radiology · Contrast safety: kidney function

Sample item

Before iodinated contrast CT in a patient with chronic kidney disease, what is an important safety step?

AAssume contrast is risk-freeBWithhold all urgent imaging automaticallyCUse barium regardless of indicationDAssess renal function and balance imaging benefit against kidney risk

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Assess renal function and balance imaging benefit against kidney risk

Iodinated contrast decisions require assessment of kidney function, clinical urgency, hydration status, and alternatives. The diagnostic benefit may outweigh risk, particularly in emergencies.

Option by option

A. Assume contrast is risk-free
Contrast risk is not zero and should be assessed.
B. Withhold all urgent imaging automatically
Automatic withholding can cause harm when urgent diagnosis is needed.
C. Use barium regardless of indication
Barium is not a universal substitute and can be inappropriate in many settings.
D. Assess renal function and balance imaging benefit against kidney risk (correct)
Correct. Risk stratification and clinical context guide safe contrast use.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is D, Assess renal function and balance imaging benefit against kidney risk. Iodinated contrast decisions require assessment of kidney function, clinical urgency, hydration status, and alternatives.

Why is "Assume contrast is risk-free" not the answer?

Contrast risk is not zero and should be assessed.

Why is "Withhold all urgent imaging automatically" not the answer?

Automatic withholding can cause harm when urgent diagnosis is needed.

Why is "Use barium regardless of indication" not the answer?

Barium is not a universal substitute and can be inappropriate in many settings.

What concept does this question test?

It tests Contrast safety: kidney function in Radiology. The diagnostic benefit may outweigh risk, particularly in emergencies.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Contrast safety: kidney function?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.