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OBG · Labour and delivery: Kustner sign
Sample itemIn the third stage, the attendant presses with the hand above the symphysis pubis and notices that the umbilical cord at the vulva is drawn back into the vagina. How should this be interpreted?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. The placenta has not yet separated
In Kustner's test, suprapubic pressure pushes the uterus upward. If the cord retracts, it is still attached to the adherent placenta; if the cord stays still or advances, the placenta has separated. Other signs of separation are cord lengthening, a gush of blood, and a firm globular fundus.
Option by option
A. The uterus has inverted
Uterine inversion presents with a mass in the vagina, severe pain and shock.
B. The cord has been avulsed
Cord avulsion would leave no cord to be drawn back.
C. The placenta has not yet separated (correct)
Correct. A cord that ascends under suprapubic pressure is still anchored to an unseparated placenta.
D. The placenta has separated and descended
If the placenta had separated, the cord would stay put or descend.
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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