Grunting is the short, soft sounds a young infant makes while?

Appeared in: Hariyana-CHO-2021

Explanation

Grunting is a short, low-pitched sound heard during expiration (breathing out) in infants.
It is produced by the partial closure of the glottis (the opening between the vocal cords).
This action is an attempt to increase pressure in the lungs (auto-PEEP) to keep the alveoli (air sacs) open, which is a sign of respiratory distress.

Option A: Sounds during inspiration are typically high-pitched (stridor) and suggest an upper airway obstruction, not the expiratory grunting associated with alveolar collapse.
Option C: Grunting is a specific physiological response that occurs only during the expiratory phase of breathing.
Option D: A correct option is available, as grunting is a well-defined clinical sign that occurs during expiration.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of infant grunting and its clinical significance as background academic context rather than a clinical decision trigger.
Recognizing grunting as an expiratory sound is a critical nursing skill for the early identification of respiratory distress in neonates and infants.
A grunting infant requires immediate assessment of respiratory rate, work of breathing (retractions, nasal flaring), and oxygen saturation (SpO2).
What if? - If the infant was making a high-pitched sound on inspiration (stridor) instead of grunting, the nurse's priority would shift from assessing for lung parenchymal disease (like RDS) to investigating an upper airway obstruction.

How to Approach the Question

Identify the core subject: The question asks about the timing of 'grunting' in an infant's breathing cycle.
Recall the pathophysiology of respiratory distress in infants. Grunting is a compensatory mechanism.
Analyze the mechanism: Grunting is an attempt to keep alveoli open at the end of expiration. Therefore, the sound must be produced during expiration (breathing out).
Evaluate the options based on this physiological principle. 'Breathing in' is associated with stridor. 'Breathing out' matches the mechanism of grunting. 'Breathing in and out' is too general and incorrect.
Select the option that accurately describes the expiratory nature of grunting.

Concept Tested & Keywords

Concept Tested: Physiology of infant grunting and its clinical significance.
Stem keywords: Grunting, infant, sounds
Lead-in keywords: while?
Clinical cues: young infant - indicates neonatal or pediatric context where grunting is a critical sign
Negative lead-in flag: false

QjExUckgImmjII10RzUwjr

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 397-399

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 298-300

Practise the full Hariyana-CHO-2021

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