The greenish colour of amniotic fluids is due to the presence of?

Appeared in: JSSH Staff Nurse - 2019

Explanation

The greenish discoloration of amniotic fluid is a classic sign of meconium staining.
Meconium is the first stool of the fetus, which is dark green due to the presence of bile pigments like biliverdin.
Its presence in the amniotic fluid usually indicates an episode of fetal stress or hypoxia, which causes the relaxation of the fetal anal sphincter.
This finding is clinically significant as it alerts the healthcare team to potential fetal compromise and the risk of Meconium Aspiration Syndrome (MAS) in the newborn.

Option B: Vernix is a white, cheesy substance that protects the fetal skin. Its presence in the amniotic fluid can make it appear cloudy or turbid, but it does not cause a green color.
Option C: Proteins are a normal, soluble component of amniotic fluid and do not impart any specific color.
Option D: Lanugo is the fine, soft hair that covers the fetus. While it is shed into the amniotic fluid, it is unpigmented and does not cause a green discoloration.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Interpretation of amniotic fluid color as background academic context rather than a clinical decision trigger.
A nurse observing meconium-stained amniotic fluid must immediately report this finding to the obstetrician and pediatrician, as it signals potential fetal distress.
During labor, the nurse should prepare for potential neonatal resuscitation, including having suction equipment (like a DeLee suction trap or meconium aspirator) ready at the bedside to clear the newborn's airway.
Continuous fetal heart rate monitoring is crucial to assess for ongoing fetal distress when meconium is present.

How to Approach the Question

The question asks to identify the cause of a specific abnormal finding: greenish amniotic fluid. This is a factual recall question based on obstetric knowledge.
Focus on the keyword 'greenish'.
Recall the normal and abnormal characteristics of amniotic fluid. Normal fluid is clear to pale straw-colored.
Evaluate each option's properties: Meconium is the fetal first stool, known to be dark green. Vernix is a white, cheesy substance. Proteins are a normal, colorless component. Lanugo is fine hair, which is not pigmented green.
Conclude that meconium is the only substance listed that would stain the fluid green.

Concept Tested & Keywords

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 53-64

Practise the full JSSH Staff Nurse - 2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.