A nurse observes mottling on a newborn's skin, characterized by a bluish or pale, blotchy appearance with a marbled pattern. What could be the most likely cause of this condition?

1. A

   Acute respiratory distress syndrome

2. B

   Elevated blood sugar levels

3. C

   Gastrointestinal complications

4. D

   Normal physiological response to cold temperatures

Appeared in: NORCET 7 Prelims -2024

Explanation

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• Mottling, or cutis marmorata, is a common finding in newborns when they are exposed to cold.
• It is caused by an accentuated physiologic vasomotor response in the immature circulatory system, leading to an uneven constriction of blood vessels.
• The lacy, reticulated, bluish pattern is transient and typically disappears completely when the infant is warmed.
• This is considered a benign and normal physiological response that requires no treatment other than keeping the infant warm.

Why Other Options Were Wrong

• Option A: Acute respiratory distress syndrome (ARDS) causes central cyanosis, a uniform blue discoloration due to severe hypoxemia, not a blotchy, marbled pattern like mottling.
• Option B: Elevated blood sugar (hyperglycemia) does not cause skin mottling. While severe low blood sugar (hypoglycemia) can cause color changes like pallor or cyanosis, mottling is not a characteristic sign.
• Option C: Gastrointestinal complications, such as intestinal obstruction, present with symptoms like bilious vomiting, abdominal distention, and feeding intolerance, not directly with skin mottling.

Related Visual

• Visual 1: Photograph - A clear image of a newborn's skin showing the characteristic lacy, marbled pattern of cutis marmorata (mottling).
• Visual 2: Comparison Chart - A visual guide differentiating physiological mottling from pathological mottling (associated with sepsis) and central cyanosis (associated with respiratory/cardiac distress).

Clinical Relevance

• Nursing practice connection: Knowing Assessment of common physiological skin variations in newborns helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• A key nursing responsibility is to differentiate between benign physiological skin changes and signs of underlying pathology.
• While mottling is usually benign, persistent mottling that does not resolve with warming, especially when accompanied by other signs like lethargy, poor feeding, or temperature instability, is a red flag for serious conditions like sepsis or shock and requires immediate medical evaluation.
• Patient education is crucial. Nurses should reassure parents that transient mottling due to cold is normal and advise them on how to keep their baby appropriately warm.

How to Approach the Question

• First, identify the key clinical finding described in the question: a 'bluish or pale, blotchy appearance with a marbled pattern' on a newborn's skin. This is the classic description of mottling.
• Next, recall the common causes of mottling in the neonatal population. Consider both physiological (normal) and pathological (disease-related) causes.
• Evaluate the options provided. The question asks for the 'most likely' cause. In an otherwise healthy-appearing newborn, a transient response to cold is the most frequent cause.
• Option A (ARDS) would present with severe breathing difficulty and central cyanosis.
• Option B (blood sugar) is not directly linked to mottling.
• Option C (GI issues) would present with abdominal symptoms.

Concept Tested & Keywords

• Concept Tested: Assessment of common physiological skin variations in newborns.
• Stem keywords: newborn, mottling, bluish, pale, blotchy, marbled pattern
• Lead-in keywords: most likely cause
• Clinical cues: The description of a 'marbled pattern' is a classic sign of cutis marmorata.

Question ID

QX7uAWJp7FQ1GKw4uLB_Im

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