Renal imaging: ureteric jets on Doppler: 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 · Renal imaging: ureteric jets on Doppler

Sample item

A patient with acute loin pain has an ultrasound showing mild right hydronephrosis. Colour Doppler of the bladder shows ureteric jets on the left but none on the right. What does this suggest?

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

The answer and the reasoning

D. Complete or high-grade obstruction of the right ureter

A ureteric jet is the intermittent flow of urine into the bladder, seen on colour Doppler. Absence on one side with ipsilateral hydronephrosis suggests complete obstruction, whereas a weak continuous jet suggests partial obstruction. It is a useful adjunct when ultrasound is the first test.

Option by option

  • A. Bladder outlet obstruction

    Bladder outlet obstruction would affect both sides.

  • B. Normal findings

    The jets are expected on both sides in normal individuals.

  • C. Renal vein thrombosis

    Renal vein thrombosis is not assessed by ureteric jets.

  • D. Complete or high-grade obstruction of the right ureter (correct)

    Correct. An absent jet with hydronephrosis suggests complete obstruction.

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.

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Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is D, Complete or high-grade obstruction of the right ureter. A ureteric jet is the intermittent flow of urine into the bladder, seen on colour Doppler.

Why is "Bladder outlet obstruction" not the answer?

Bladder outlet obstruction would affect both sides.

Why is "Normal findings" not the answer?

The jets are expected on both sides in normal individuals.

Why is "Renal vein thrombosis" not the answer?

Renal vein thrombosis is not assessed by ureteric jets.

What concept does this question test?

It tests Renal imaging: ureteric jets on Doppler in Radiology. Absence on one side with ipsilateral hydronephrosis suggests complete obstruction, whereas a weak continuous jet suggests partial obstruction. It is a useful adjunct when ultrasound is the first test.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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 Renal imaging: ureteric jets on Doppler?

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.