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Updated: Aug 9, 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
Acquired subglottic stenosis in the very-low-birth-weight infant
Insights
Acquired subglottic stenosis is a serious complication for newborn infants requiring mechanical ventilation. Orotracheal intubation increased the risk, leading to poor outcomes and difficulty in extubation for very-low-birth-weight infants.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Medical Engineering
Background:
- Mechanical ventilation is a critical intervention for critically ill newborn infants.
- Acquired subglottic stenosis is a known complication of endotracheal intubation.
- Very-low-birth-weight infants are particularly vulnerable to airway injury.
Purpose of the Study:
- To investigate the incidence and risk factors of acquired subglottic stenosis in infants.
- To determine the association between intubation method and subglottic stenosis.
- To highlight the challenges in extubating infants with this complication.
Main Methods:
- Retrospective review of infants who survived mechanical ventilation from 1975-1980.
- Analysis of intubation methods (nasotracheal vs. orotracheal) and patient birth weights.
- Assessment of outcomes including tracheostomy and decannulation rates.
Main Results:
- Eight cases of acquired subglottic stenosis were identified in infants under one year old.
- Seven of these cases occurred in infants weighing less than 1,500 g.
- A shift in intubation practice from nasotracheal to orotracheal coincided with an increased incidence of stenosis.
Conclusions:
- Orotracheal intubation may be associated with a higher risk of acquired subglottic stenosis in neonates.
- Subglottic stenosis presents a significant barrier to successful extubation in very-low-birth-weight infants.
- Early recognition of this complication is crucial for managing these vulnerable infants.
Abstract:
In the six-year period from 1975 through 1980, acquired subglottic stenosis was recognized in eight patients during the first year of life who survived intubated mechanical ventilation as newborn infants. Seven of eight cases occurred in infants who weighed less than 1,500 g at birth. This complication was not seen in the first three years of the review, when only nasotracheal intubation was practiced. In the second three years, orotracheal intubation was the predominant practice. Seven infants required tracheostomy and the outcome was poor: none has undergone decannulation and three have died. Recognition of this disorder as a cause of inability to extubate the very-low-birth-weight infant is stressed.
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