A mother delivered a male baby and following delivery, the placenta is coming out from the vagina with a shiny surface of the placenta, which indicates?

1. A

   Duncan, maternal surface

2. B

   Schultz, fetal surface

3. C

   Duncan, fetal surface

4. D

   Schultz, maternal surface

Appeared in: NORCET 6 mains-2024

Explanation

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• The question describes the placenta presenting with a shiny surface, which is a key characteristic of the Schultz mechanism of placental separation.
• In the Schultz mechanism, separation begins centrally, causing the placenta to invert and present with the smooth, glistening fetal surface first.
• This is the most common method of placental separation, often remembered by the mnemonic "Shiny Schultz.".
• The fetal surface is covered by the amnion, giving it a shiny appearance, and is where the umbilical cord is attached.

Why Other Options Were Wrong

• Option A: The Duncan mechanism is characterized by the presentation of the dull, rough maternal surface, not the shiny fetal surface. This is often called 'Dirty Duncan'.
• Option C: This option incorrectly pairs the Duncan mechanism with the fetal surface. The Duncan mechanism always presents the maternal surface.
• Option D: This option incorrectly pairs the Schultz mechanism with the maternal surface. The Schultz mechanism is defined by the shiny fetal surface presenting first.

Related Visual

• Visual 1: Diagram - A side-by-side illustration comparing the Schultz (central separation, fetal surface presenting) and Duncan (marginal separation, maternal surface presenting) mechanisms of placental delivery.
• Visual 2: Image - A photograph of a delivered placenta showing the shiny fetal surface with the umbilical cord insertion, contrasted with a photo of the rough, cotyledon-covered maternal surface.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Mechanisms of placental separation (Schultz vs. Duncan) as background academic context rather than a clinical decision trigger.
• Understanding the mechanism of placental separation is crucial for the nurse or midwife attending the delivery.
• The Duncan mechanism is associated with a higher risk of incomplete placental separation and retained placental fragments, which can lead to postpartum hemorrhage (PPH) and infection. Therefore, careful inspection of the placenta is vital, especially when the maternal surface presents first.
• What if? If the placenta presented with a dull, rough surface and there was a steady trickle of blood during its expulsion, the nurse should suspect a Duncan mechanism. This would warrant a meticulous examination of the delivered placenta for completeness to rule out retained cotyledons and increase vigilance for signs of PPH.

How to Approach the Question

• This is a recall-based question testing knowledge of obstetrics.
• First, identify the key information in the stem: the placenta is coming out with a 'shiny surface'.
• Associate the keyword 'shiny' with the fetal side of the placenta.
• Recall the two main mechanisms of placental separation: Schultz and Duncan.
• Use the mnemonic 'Shiny Schultz' to remember that the Schultz mechanism involves the shiny fetal surface presenting first.
• Use the mnemonic 'Dirty Duncan' to remember that the Duncan mechanism involves the dull, rough ('dirty') maternal surface presenting first.

Concept Tested & Keywords

• Concept Tested: Mechanisms of placental separation (Schultz vs. Duncan)
• Stem keywords: placenta, delivery, shiny surface
• Lead-in keywords: indicates
• Clinical cues: shiny surface of the placenta

Question ID

Q62DjgaLEVnB5l1mtYdJ50

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