Pediatric Pulmonology Glossary
103 terms total — 24 showing — Last updated 15 Sep 2026
Lung Clearance Index LCI
A measure of ventilation inhomogeneity derived from multiple-breath washout testing, reflecting how efficiently a gas (typically nitrogen or sulfur hexafluoride) is cleared from the lungs.
pulmonary atresia
Congenital heart defect where the pulmonary valve fails to develop properly, blocking blood flow from the right ventricl...
pulmonary exacerbation
An acute worsening of respiratory symptoms and lung function beyond a patient's normal day-to-day variation, requiring a...
pulmonary function test
A group of tests measuring lung capacity, airflow, and gas exchange to assess respiratory function.
pulmonary hypoplasia
Underdevelopment of one or both lungs, resulting in reduced lung volume and alveolar number.
pulmonary interstitial emphysema
Condition where air leaks into the lung tissue spaces, particularly in premature infants on mechanical ventilation.
pulmonary surfactant protein deficiency
Rare genetic disorder affecting surfactant protein production, causing severe neonatal and childhood respiratory disease...
raised-volume rapid thoracic compression
An infant lung function maneuver in which the lungs are inflated to a standardised pressure before a jacket rapidly comp...
reactive airway disease
Non-specific term describing reversible airway obstruction in children too young for definitive asthma diagnosis.
Residual Volume
The volume of air remaining in the lungs after a maximal forced exhalation, which cannot be expelled voluntarily.
respiratory distress syndrome
Condition primarily affecting premature infants caused by surfactant deficiency leading to alveolar collapse and respira...
respiratory syncytial virus
A common viral infection causing bronchiolitis and pneumonia in infants and young children.
slide tracheoplasty
A surgical technique for congenital tracheal stenosis in which the stenotic segment is divided transversely at its midpo...
spirometry
Pulmonary function test measuring lung volumes and airflow rates, requiring patient cooperation and typically performed...
stridor
High-pitched, harsh respiratory sound caused by turbulent airflow through narrowed airways, indicating potential airway...
subglottic stenosis
Narrowing of the airway below the vocal cords, either congenital or acquired, causing stridor and breathing difficulties...
surfactant deficiency
A condition in premature infants where insufficient lung surfactant leads to respiratory distress syndrome.
Sweat Chloride Test
The gold-standard diagnostic test for cystic fibrosis, measuring the concentration of chloride ions in sweat collected b...
tachypnea
Abnormally rapid breathing rate exceeding age-appropriate normal values.
Total Lung Capacity
The maximum volume of air the lungs can contain after a maximal inspiratory effort, encompassing all lung subdivisions.
tracheal agenesis
A rare, usually fatal congenital anomaly in which the trachea is absent or severely underdeveloped, typically associated...
tracheal shift
A physical examination finding in which the trachea is displaced laterally from the midline, indicating underlying media...
tracheoesophageal fistula
Abnormal connection between the trachea and esophagus, often congenital, requiring surgical intervention in neonates.
tracheomalacia
A condition where tracheal cartilage is soft and floppy, causing airway collapse during breathing.
tracheostomy
Surgical procedure creating an opening in the anterior neck to establish a direct airway through the trachea.