Postpartum haemorrhage and emergencies: hydrostatic replacement of inversion: practice question

A OBG 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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OBG · Postpartum haemorrhage and emergencies: hydrostatic replacement of inversion

Sample item

What is the principle of O'Sullivan's hydrostatic method for acute uterine inversion?

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

The answer and the reasoning

A. Warm saline is run into the vagina under pressure with the introitus sealed

In the hydrostatic method the introitus is sealed by the operator's hand or a silicone cup while warm saline is infused into the vagina. Rising pressure distends the vagina and everts the fundus back into the cavity, which is simple and avoids anaesthesia in some cases.

Option by option

  • A. Warm saline is run into the vagina under pressure with the introitus sealed (correct)

    Correct. Fluid pressure in the sealed vagina pushes the fundus back.

  • B. The vagina is packed tightly with gauze

    Packing does not reduce an inversion and could cause more injury.

  • C. Allis forceps are placed on the fundus for traction

    Traction on the fundus would worsen the inversion.

  • D. The round ligaments are pulled through a laparotomy

    Pulling the round ligaments describes an abdominal operation such as Huntington's.

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 OBG question

What is the answer to this OBG question?

The best answer is A, Warm saline is run into the vagina under pressure with the introitus sealed. In the hydrostatic method the introitus is sealed by the operator's hand or a silicone cup while warm saline is infused into the vagina.

Why is "The vagina is packed tightly with gauze" not the answer?

Packing does not reduce an inversion and could cause more injury.

Why is "Allis forceps are placed on the fundus for traction" not the answer?

Traction on the fundus would worsen the inversion.

Why is "The round ligaments are pulled through a laparotomy" not the answer?

Pulling the round ligaments describes an abdominal operation such as Huntington's.

What concept does this question test?

It tests Postpartum haemorrhage and emergencies: hydrostatic replacement of inversion in OBG. Rising pressure distends the vagina and everts the fundus back into the cavity, which is simple and avoids anaesthesia in some cases.

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 Postpartum haemorrhage and emergencies: hydrostatic replacement of inversion?

Learn management algorithms as steps: PPH, eclampsia, ectopic pregnancy. Then use the flashcards and the other OBG 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.