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Updated: Jul 20, 2025

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
Meconium aspiration syndrome: a comprehensive review
Ahmed Osman1, Cecilie Halling2, Mary Crume3
1Department of Pediatrics, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43205, USA. ahmed.osman@nationwidechildrens.org.
Abstract:
Meconium aspiration syndrome (MAS) is a complex respiratory disease that continues to be associated with significant morbidities and mortality. The pathophysiological mechanisms of MAS include airway obstruction, local and systemic inflammation, surfactant inactivation and persistent pulmonary hypertension of the newborn (PPHN). Supplemental oxygen and non-invasive respiratory support are the main therapies for many patients. The management of the patients requiring invasive mechanical ventilation could be challenging because of the combination of atelectasis and air trapping. While studies have explored various ventilatory modalities, evidence to date does not clearly support any singular modality as superior. Patient's pathophysiology, symptom severity, and clinician/unit expertise should guide the respiratory management. Early identification and concomitant management of PPHN is critically important as it contributes significantly to mortality and morbidities.
Insights
Meconium aspiration syndrome (MAS) is a severe newborn respiratory condition. Optimal management requires individualized respiratory support, focusing on early identification and treatment of persistent pulmonary hypertension of the newborn (PPHN).
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Critical Care
Background:
- Meconium aspiration syndrome (MAS) is a significant cause of neonatal morbidity and mortality.
- Pathophysiological mechanisms include airway obstruction, inflammation, surfactant inactivation, and persistent pulmonary hypertension of the newborn (PPHN).
Purpose of the Study:
- To review the complex respiratory management of MAS.
- To emphasize the importance of individualized care and PPHN management.
Main Methods:
- Review of current literature on MAS pathophysiology and respiratory support strategies.
- Discussion of challenges in mechanical ventilation for MAS patients.
Main Results:
- Supplemental oxygen and non-invasive support are initial therapies.
- Mechanical ventilation can be challenging due to atelectasis and air trapping.
- No single ventilatory modality is universally superior.
Conclusions:
- Respiratory management for MAS should be tailored to patient pathophysiology, severity, and clinician expertise.
- Early identification and management of PPHN are crucial for improving outcomes.
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