In a preterm baby elbow readily goes beyond the midline of chest, this is known as

Uttarakhand CHO - 2021

Child Health Nursing (Pediatrics)

Easy

Appeared in: Uttarakhand CHO - 2021

Explanation

The Scarf sign is a specific maneuver used to assess the passive tone of the shoulder girdle muscles in a newborn.
It is a standard component of the New Ballard Score, a clinical tool for estimating gestational age.
In a preterm infant, hypotonia (low muscle tone) allows the elbow to be pulled easily across the chest past the midline, resembling a scarf being wrapped around the neck.
Conversely, a full-term infant has developed flexor tone, which creates resistance and prevents the elbow from reaching the midline.

Option B: Arm recoil assesses the flexor tone of the biceps by observing how quickly the arm returns to flexion after being extended. It does not involve pulling the arm across the chest.
Option C: The popliteal angle assesses the muscle tone of the legs (hamstrings), not the shoulder or arm. It measures the resistance to leg extension.
Option D: The glabellar tap is a test for a primitive reflex (Myerson's sign) and is not part of the neuromuscular maturity assessment for gestational age. It involves tapping the forehead to elicit a blink.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Neonatal Assessment for Gestational Age as background academic context rather than a clinical decision trigger.
The Scarf sign is a quick, non-invasive part of the Ballard assessment that helps clinicians differentiate between preterm, term, and post-term infants. This estimation is crucial for anticipating potential complications and planning appropriate care (e.g., respiratory support, feeding strategies, thermoregulation).
Accurate gestational age assessment helps identify infants at risk for conditions like Respiratory Distress Syndrome (RDS) in preemies or meconium aspiration in post-term infants.
What if? If an infant who was presumed to be full-term based on dates shows a positive Scarf sign (elbow crosses midline), it would raise suspicion for hypotonia. This could be due to an inaccurate gestational age, sepsis, a metabolic disorder, or a neurological problem, prompting further investigation.

How to Approach the Question

First, identify the core action described in the question: an infant's elbow being pulled across the chest beyond the midline.
Recognize this as a test of passive muscle tone, a key indicator of neuromuscular maturity in a newborn.
Recall the different components of the neonatal assessment, particularly the New Ballard Score.
Match the described action to the correct term. The name 'Scarf sign' is a direct mnemonic for the motion of wrapping the arm around the neck like a scarf.
Systematically eliminate the other options by defining their purpose: 'Arm recoil' tests flexion return, 'Popliteal angle' tests leg muscles, and 'Glabellar tap' is a facial reflex.

Concept Tested & Keywords

Concept Tested: Neonatal Assessment for Gestational Age
Stem keywords: preterm baby, elbow, midline of chest
Lead-in keywords: known as
Clinical cues: The key finding is the elbow 'readily' going 'beyond the midline', which points to low muscle tone (hypotonia), a classic sign of prematurity.

QLp254TuOxReFVJLwQ-3f3

E6 Text Book Of Pediatric Nursing 3rd Panchali Pal — Part 1 (pp 36-238 of 713) p. 151-153

E6 Comprehensive Textbook of Community Health NursingShyamala D part 1 (pp 26-389 of 389) p. 161-163