Airway Volume Simulation in Virtual Mandibular Distraction: A Cohort Study.

Area of Science:

• Craniofacial Surgery
• Pediatric Airway Management
• Surgical Planning Technology

Background:

• Pierre Robin sequence (PRS) often causes tongue-based airway obstruction due to a hypoplastic mandible.
• Mandibular distraction osteogenesis (MDO) is a common surgical intervention for PRS-related airway issues.
• Virtual surgical planning (VSP) is increasingly used to guide MDO procedures.

Purpose of the Study:

• To evaluate the accuracy of VSP in predicting airway volume changes following MDO in PRS patients.
• To assess the correlation between predicted and actual mandibular distraction and subsequent airway volume modifications.
• To determine if VSP can reliably guide the anatomical endpoint of MDO for airway improvement.

Main Methods:

• Retrospective review of 11 PRS patients undergoing MDO with VSP.
• Three-dimensional computed tomography (3D CT) scans used for pre- and post-operative airway volume calculations.
• Comparison of airway volumes predicted by VSP with actual post-operative volumes calculated by industry software and institutional radiologists.

Main Results:

• MDO significantly improved apnea-hypopnea index and oxygen saturation in PRS patients.
• Strong correlation (R=0.99, p<0.001) observed between VSP-predicted and industry-calculated post-distraction airway volumes.
• Moderate correlation found between predicted and actual mandibular distraction lengths (R=0.65, p=0.003).

Conclusions:

• VSP-predicted airway volume is a potentially effective adjunct for determining the anatomical endpoint of MDO.
• Limitations include small sample size, variability in operators and software, and patient-specific airway morphology.
• Further research is needed to confirm these findings and establish definitive clinical guidelines.