A nurse admits a newborn infant to the nursery. On assessment of the infant, the nurse palpates the anterior fontanel and notes that it feels soft. The nurse determines that the finding indicates:

1. A

   Dehydration

2. B

   A normal finding

3. C

   Increased intracranial pressure

4. D

   Decreased intracranial pressure

Appeared in: DHS Staff Nurse - 2018 (Shift-2nd)

Explanation

• A soft and flat or slightly depressed anterior fontanel is the expected and normal finding in a healthy newborn.
• Fontanels are membranous gaps between the skull bones that allow for head molding during birth and accommodate rapid brain growth.
• The texture of the fontanel provides key information about the infant's hydration and neurological status.
• The finding of a 'soft' fontanel, without mention of it being sunken or bulging, points to a normal state.

Why Other Options Were Wrong

• Option A: Dehydration would cause the fontanel to be sunken or depressed, not just soft. This is due to a decrease in the total fluid volume in the body.
• Option C: Increased intracranial pressure (ICP) would cause the fontanel to feel tense, firm, or bulging. This is a serious sign indicating conditions like hydrocephalus, meningitis, or intracranial bleeding.
• Option D: While severe dehydration can lead to a state of decreased intracranial pressure, 'Dehydration' is the more specific and clinically appropriate diagnosis associated with a sunken fontanel. 'Decreased intracranial pressure' is not a standard primary finding from palpation.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Assessment of newborn fontanels to guide bedside assessment, documentation, and the next nursing action.
• Fontanel assessment is a fundamental nursing skill for early detection of dehydration and serious neurological conditions in infants.
• Nurses must educate parents on normal 'soft spots' to reduce anxiety, while also teaching them to recognize and report signs of bulging or sinking, which require medical attention.
• What if? If the nurse assessed the fontanel while the infant was crying vigorously and found it to be bulging, the correct action would be to wait until the infant is calm and reassess. If it remains bulging when the infant is calm and upright, it signifies a true abnormality requiring immediate physician notification.

How to Approach the Question

• First, identify the key assessment finding in the question stem: the anterior fontanel feels 'soft'.
• Next, recall the normal and abnormal characteristics of a newborn's fontanels. A normal fontanel is soft and flat (or very slightly depressed).
• Consider the pathophysiology of the incorrect options. Dehydration causes fluid loss, leading to a sunken fontanel. Increased intracranial pressure forces fluid upward, causing a bulging fontanel.
• Compare the finding ('soft') to these possibilities. 'Soft' aligns with the description of a normal fontanel.
• Eliminate the options describing abnormal states (Dehydration, Increased ICP). 'Decreased ICP' is a less precise term for the effects of dehydration.
• Conclude that a soft fontanel is a normal finding.

Concept Tested & Keywords

• Concept Tested: Assessment of newborn fontanels
• Stem keywords: newborn infant, assessment, anterior fontanel, soft
• Lead-in keywords: indicates
• Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.

Question ID

QJ-Um40sDrWhAZW2vlh2Kl

Copy ID

Reference Book

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 pp. 1357-1359, 1358-1360