Airway Morphological Changes in Pierre Robin Sequence: A Retrospective Study

Area of Science:

• Craniofacial Surgery
• Pediatric Otolaryngology
• Airway Management

Background:

• Pierre Robin sequence (PRS) is associated with severe upper airway obstruction (UAO) due to mandibular hypoplasia.
• Mandibular distraction osteogenesis (MDO) is a surgical intervention to advance the mandible and alleviate UAO in PRS patients.
• Understanding airway morphology changes post-MDO is crucial for optimizing treatment outcomes.

Purpose of the Study:

• To investigate airway morphology changes in PRS patients before and after MDO.
• To compare airway morphology in post-MDO PRS patients to age-matched controls.
• To assess the relationship between airway dimensions and UAO recurrence.

Main Methods:

• Retrospective case-control study of 15 PRS patients undergoing MDO.
• Analysis of airway volume, surface area, length, and cross-sectional areas pre- and post-MDO.
• Comparison of airway morphology between post-MDO PRS patients and age-matched controls.

Main Results:

• MDO significantly increased airway size (volume, surface area, length) and cross-sectional areas in PRS patients.
• Post-MDO PRS airways were significantly larger than those of age-matched controls.
• Airway shape remained non-uniform post-MDO, while control airways were round. Supraphysiologic airway dimensions correlated with no UAO recurrence.

Conclusions:

• MDO effectively increases airway dimensions in PRS patients, potentially improving or resolving UAO.
• The retropalatal airway may be preferentially affected by MDO, contributing to UAO relief.
• While MDO shows promise, results should be interpreted cautiously due to small sample size and patient heterogeneity.