SLEEP ENDOSCOPY AND MAGNETIC RESONANCE IMAGING OF THE UPPER AIRWAY IN PATIENTS WITH OBSTRUCTIVE SLEEP APNEA SYNDROME

TYPE: Abstract Publication TOPIC: Sleep Disorders PURPOSE: is to evaluate the dynamic changes of the upper airway during sleep in OSAS patients, utilizing sleep endoscopy and MRI under sedation. METHODS: Subjects and methods: A total of 20 adult patients with OSA (AHI>5). All patients underwent sleep endoscopy using VOTE classification system. Anteroposterior (A-P) and transverse diameters were measured at retropalatal (RP) and retroglossal (RG) regions using MRI in sleep and wakefulness. Sleep was induced during both procedures using Propofol. RESULTS: There was a statistically significant decrease in sleep MRI evaluation in both regions compared to measurements in awake status (p <0.001). All patients had velum collapse was during sleep MRI and only 16 patients during DISE. 11 patients showed tongue base collapse in DISE compared to 10 patients in MRI. Concentric velum collapse during DISE was associated with statistically more reduction in both AP and transverse RP diameters when compared with other shapes of collapse (p=0.01). Complete Tongue base collapse during DISE was associated with statically significant difference in reduction of RG AP diameter when compared with no collapse (p=0.04). There was no statically significant difference between degree of tongue base collapse and reduction of RG transverse diameter. CONCLUSIONS: findings of both DISE and sleep MRI were comparable. Sleep MRI is a more objective technique than DISE. In addition, DISE is more advantageous; Being safe and allows direct visualization of the occlusion site. CLINICAL IMPLICATIONS: DISE and sleep MRI are valuable tools for upper airway evaluation in OSAS and for tailoring proper management. DISCLOSURE: No significant relationships. KEYWORD: OSAS, endoscopy, MRI