A 38-week pregnant woman is found to have “tobacco-juice” colored amniotic fluid on rupture of membranes. What is the most likely cause?

1. A

   Intrauterine fetal death

2. B

   Placental abruption

3. C

   Placenta previa

4. D

   Chorioamnionitis

Appeared in: NORCET 9 Mains - 2025

Explanation

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• "Tobacco-juice" or dark reddish-brown amniotic fluid is a classic sign strongly indicative of intrauterine fetal death (IUFD).
• This specific discoloration results from the breakdown of fetal tissues (maceration) and the hemolysis of red blood cells after the fetus has been deceased for a prolonged period.
• The presence of old, hemolyzed blood and tissue breakdown products stains the amniotic fluid, distinguishing it from the colors seen in other obstetric complications.

Why Other Options Were Wrong

• Option B: Placental abruption involves bleeding, but the amniotic fluid is typically described as 'port-wine' colored if the hemorrhage is concealed and old, or it contains fresh bright red blood. This is different from the dark brown of 'tobacco-juice' fluid.
• Option C: Placenta previa is characterized by painless, bright red vaginal bleeding. It does not typically cause discoloration of the amniotic fluid itself.
• Option D: Chorioamnionitis is a bacterial infection. It would cause the amniotic fluid to be cloudy, purulent (pus-filled), and often foul-smelling, not dark brown.

Related Visual

• Visual 1: Chart - A comparative chart showing different colors of amniotic fluid (clear, green, golden, port-wine, tobacco-juice) and listing the associated clinical condition for each. This helps in quick recall and differentiation.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical interpretation of amniotic fluid characteristics in pregnancy as background academic context rather than a clinical decision trigger.
• A nurse's assessment of amniotic fluid color upon rupture of membranes is a critical skill. Recognizing 'tobacco-juice' fluid is an emergency finding that requires immediate notification of the obstetrician or midwife.
• Management priorities shift to confirming fetal demise, supporting the grieving mother and family, and monitoring the mother for complications such as disseminated intravascular coagulation (DIC), which can be triggered by the retained products of conception.
• What if? - If the fluid had been green-tinged, the nurse would suspect meconium staining. The immediate nursing action would be to initiate continuous electronic fetal monitoring to assess for signs of fetal distress and notify the provider, as this could indicate fetal hypoxia.

How to Approach the Question

• This is a clinical scenario question that tests your ability to recognize a pathognomonic sign.
• First, identify the key clinical finding in the question stem: 'tobacco-juice' colored amniotic fluid.
• Next, systematically review the options provided.
• Recall the classic presentation associated with each condition. For example, associate placenta previa with painless bright red bleeding, placental abruption with painful bleeding and port-wine fluid, and chorioamnionitis with fever and purulent fluid.
• Match the specific sign ('tobacco-juice' fluid) with its known cause. This color is uniquely associated with the breakdown of a fetus that has been deceased for some time.
• Select the option that directly corresponds to this classic sign, which is Intrauterine fetal death.

Concept Tested & Keywords

• Concept Tested: Clinical interpretation of amniotic fluid characteristics in pregnancy.
• Stem keywords: 38-week pregnant, tobacco-juice colored amniotic fluid, rupture of membranes
• Lead-in keywords: most likely cause
• Clinical cues: The specific description 'tobacco-juice' color is a pathognomonic sign pointing directly to the diagnosis.

Question ID

QwwKMCcE6-g8QuaxbFcUQd

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