Computer-assisted quantitative evaluation of obstructive sleep apnea using digitalized endoscopic imaging with Muller...

Area of Science:

• Otolaryngology
• Sleep Medicine
• Medical Imaging

Background:

• The Muller maneuver (MM) is a clinical test to assess upper airway collapsibility.
• Videoendoscopy provides a dynamic view of the upper airway during respiratory maneuvers.
• Quantifying airway changes during MM can aid in diagnosing sleep-disordered breathing.

Purpose of the Study:

• To validate the use of videoendoscopy for the Muller maneuver (MM).
• To quantify the correlation between MM findings and polysomnography variables.
• To assess the retropalatal (RP) and retrolingual (RL) airway dynamics.

Main Methods:

• A prospective, controlled study involving 70 patients (35 with snoring history, 35 without).
• Videoendoscopy with MM was performed, measuring cross-sectional areas at RP and RL during quiet breathing and maximal MM effort.
• Collapsing ratio (CR) was calculated, and results were correlated with polysomnography data (RDI, OSA staging).

Main Results:

• Significant differences in CR of RP (CR(RP)), CR of RL (CR(RL)), and BMI were observed between groups.
• In snoring patients, BMI correlated with RDI and OSA staging, but not CR(RP) or CR(RL).
• CR(RP) showed a significant positive relationship with RDI and OSA staging, unlike CR(RL).

Conclusions:

• MM combined with videoendoscopy is a simple, cost-effective, and quantitative technique.
• This method allows dynamic examination of the upper airway.
• It aids in more precise preoperative planning for airway interventions.