Comparing Diagnostic Efficacy of Imaging During Muller's Maneuver Versus Drug Induced Sleep Endoscopy in Obstructive Sleep Apnoea.

The aim of the study was to compare the diagnostic efficacy of quantitative computed tomography (CT) based upper airway analysis using the Muller's maneuver (MM) and compare the findings with drug induced sleep endoscopy (DISE). A prospective observational study was conducted on 50 adult patients with symptoms of OSA and having apnoea-hypopnea index more than 5. They further underwent CT during normal breathing and during MM; findings of which were compared with DISE. Collapse at velum had statistically significant correlation with collapse at retropalatal level in CT (in MM) ( P value = 0.001; r = 0.536). Base of tongue in DISE correlates significantly with retroglossal collapse on CT ( P value = 0.002; r = 0.423). Epiglottic and oropharyngeal collapse had no correlation with any CT parameter. Collapse in CT as measured during MM shows significant correlation with DISE findings at velum and tongue base but cannot solely predict all levels without the aid of DISE.