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Subglottic ductal cysts in the preterm infant: association with laryngeal intubation trauma
1Ear, Nose and Throat Department, Royal Alexandra Hospital for Children, Sydney, Australia.
Insights
Prolonged intubation in preterm infants can cause acquired subglottic ductal cysts, often linked to laryngeal trauma. These cysts may spontaneously resolve but require monitoring for airway obstruction.
Area of Science:
- Pediatric Otolaryngology
- Neonatal Intensive Care
- Pediatric Airway Management
Background:
- Acquired subglottic ductal cysts are increasingly reported in preterm infants after prolonged intubation.
- These cysts are often associated with significant laryngeal trauma from intubation.
Purpose of the Study:
- To review subglottic ductal cysts in pediatric patients.
- To investigate the association between these cysts and intubation trauma.
Main Methods:
- Retrospective review of 15 pediatric patients diagnosed with subglottic ductal cysts between 1989 and 1993.
- Analysis of patient demographics, intubation history, cyst characteristics, and clinical outcomes.
Main Results:
- Eighty percent of cases occurred in preterm, low-birth-weight infants following prolonged intubation.
- Major laryngeal intubation trauma was present in all but 3 patients.
- Cysts were typically multiple, posterolateral, and often did not cause significant obstruction, but 10 patients required tracheotomy due to associated intubation changes.
- Cysts did not enlarge, and spontaneous resolution or shrinkage was observed in 4 patients.
Conclusions:
- Subglottic ductal cysts in preterm infants after prolonged intubation are frequently associated with laryngeal intubation trauma.
- These cysts may be a component of the overall intubation trauma response.
- While spontaneous resolution can occur, careful follow-up and management of potentially obstructive cysts are recommended.
Abstract:
Acquired subglottic ductal cysts following prolonged intubation in preterm infants have been reported with increasing frequency during the past two decades. This paper reviews the subglottic ductal cysts diagnosed in 15 pediatric patients between 1989 and 1993--the largest such review. Eighty percent were observed in preterm low-birth weight infants following prolonged intubation, and all but 3 of the patients had major intubation trauma of the larynx--an association not previously reported. The cysts were usually multiple and arose in the posterolateral subglottis. Most were small and did not cause significant airway obstruction, but associated intubation changes were sufficiently severe to necessitate tracheotomy in 10 patients. The cysts observed in our study did not enlarge and in 4 patients were observed to spontaneously resolve or shrink in size--trends not previously reported. Subglottic ductal cysts noted in preterm infants after prolonged intubation most commonly occur in association with laryngeal intubation trauma and are likely a component of intubation trauma. Although these cysts may resolve without therapy, careful follow-up and treatment of potentially obstructing subglottic ductal cysts is recommended.