Related Experiment Video
Updated: Jul 20, 2026

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
Pulmonary arterial pressure in infants with laryngomalacia
Ekrem Unal1, Bulent Oran, Tamer Baysal
1Department of Pediatrics, Selcuk University Meram Medical Faculty, Konya, Turkey. drekremunal@yahoo.com.tr
Insights
Infants with laryngomalacia may experience higher pulmonary arterial pressure, but this condition is reversible. Doppler echocardiography can monitor these pressure changes in infants with this airway obstruction.
Area of Science:
- Pediatric Cardiology
- Neonatology
- Respiratory Medicine
Background:
- Persistent upper airway obstruction in children can lead to elevated pulmonary arterial pressure.
- Laryngomalacia is a frequent cause of infant upper airway obstruction due to laryngeal blockage.
Purpose of the Study:
- To assess pulmonary arterial pressures in infants diagnosed with laryngomalacia.
- To investigate the changes in pulmonary arterial pressure throughout infancy in affected infants.
Main Methods:
- Doppler echocardiography was used to measure pulmonary arterial pressures.
- Study included 15 infants with laryngomalacia and 30 healthy controls.
- Clinical evaluations, telecardiography, and electrocardiography were also performed.
Main Results:
- Infants with laryngomalacia exhibited significantly higher pulmonary arterial pressure compared to healthy controls.
- Pulmonary arterial pressure in the laryngomalacia group showed a significant decrease by the end of infancy.
Conclusions:
- Elevated pulmonary arterial pressure associated with laryngomalacia is reversible as infants develop.
- Doppler echocardiography is a valuable tool for monitoring pulmonary arterial pressure and clinical outcomes in infants with laryngomalacia during their symptomatic period.
Objective:
Persistent upper airway obstruction may lead to increased pulmonary arterial pressure in childhood. Laryngomalacia is one of the most common causes of transient upper airway obstruction by laryngeal blockage in infants. The aim of the study is to evaluate the pulmonary arterial pressures in infants with laryngomalacia during infancy period.
Methods:
Fifteen infants with laryngomalacia and 30 healthy controls were enrolled into this study. The pulmonary arterial pressures were measured by using Doppler echocardiography. Infants were also evaluated by clinical investigations, telecardiography and electrocardiography.
Results:
Our results showed that infants with laryngomalacia may have significantly higher pulmonary arterial pressure than healthy subjects. Pressures of patient group were significantly decreased at the end of infancy period.
Conclusions:
Increased pulmonary arterial pressure levels due to laryngomalacia are reversible by during developmental process. Therefore, in symptomatic period, evaluation of infants with laryngomalacia by using Doppler echocardiography may be useful for monitoring pulmonary arterial pressure and following up the clinical outcome.
Related Concept Videos
Pulmonary Cycle: Exhalation
Pressure Relationships in Thoracic Cavity
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
Pulmonary Ventilation: Inhalation
Boyle's law becomes particularly pertinent when examining respiratory...
Factors Affecting Pulmonary Ventilation
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Respiratory System Abnormal Finding I: Inspection and Percussion
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Breathing