What is the color of meconium?

Appeared in: NHM UP Staff Nurse - 2019

Explanation

Meconium is the first stool of a newborn, typically passed within the first 24-48 hours of life.
Its characteristic color is dark green to greenish-black.
This distinct color is due to the presence of bile pigments that accumulate during fetal life.
Meconium is also described as being thick, sticky, and tar-like in consistency.

Option A: Dark blue is not a typical color for any type of neonatal stool and would be considered an abnormal finding, possibly indicating ingestion of certain dyes or a rare metabolic condition, but it is not the color of meconium.
Option C: Dark yellow stool is more characteristic of transitional stools (as meconium changes to milk stools) or the stool of a formula-fed baby. It is not the color of the initial meconium.
Option D: Light yellow, often described as mustard yellow, is the classic color of the stool of a breastfed baby after the meconium and transitional stools have passed. It is not the color of meconium.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Characteristics of newborn stool, specifically meconium as background academic context rather than a clinical decision trigger.
A nurse's primary responsibility is to assess and document the passage of the first meconium stool within 24 hours of birth. This confirms the patency of the infant's gastrointestinal tract.
Failure to pass meconium within 24-48 hours is a red flag. The nurse must assess for other signs like abdominal distension, vomiting, or feeding intolerance and promptly notify the healthcare provider.
What if? If a 36-hour-old newborn has not passed meconium and has a distended abdomen, the nurse should withhold oral feedings, notify the physician immediately, and prepare for diagnostic tests like an abdominal X-ray to rule out conditions like Hirschsprung's disease or bowel obstruction.

How to Approach the Question

Identify the core subject of the question, which is 'meconium'.
Recall the definition and key characteristics of meconium. It is the very first stool of a newborn.
Focus on the specific characteristic asked for: 'color'.
Remember that meconium is composed of substances ingested in utero, including bile, which gives it a very dark color.
Evaluate the options provided. 'Dark green' accurately describes the classic color of meconium.
Eliminate other options by associating them with different types of newborn stool (e.g., yellow stools are seen later in breastfed or formula-fed infants).

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1-2

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1110-1112

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