P068 Computational fluid dynamic study in Obstructive Sleep Apnea patients

Abstract Introduction Obstructive sleep apnea (OSA) is a common disorder which may need surgery to widen the airway. However, success rate of variable. Thus, it necessary predict outcome preoperatively. The purpose this study evaluate mechanical parameter upper airway airflow in OSA patients using computational fluid dynamics (CFD) method. Method We conducted on with snoring, underwent full night polysomnograpny (PSG) and paranasal sinus computed tomography(CT). past history previous trauma or were excluded. Three-demensional reconstructions created medical imaging software Mimics 16.0 CT. extended from nasopharynx hypopharynx. Steady-state, turbulent, inspiratory simulations Fluent 17.0 following boundary conditions parameters (wall shear stress, pressure, plane velocity) calculated three levels nasopharynx, retropalatal, retrolingual area. Results maximum wall stress values shown at retropalatal all patients. There tendency for value area increase as AHI increases. velocity pressure Conclusion increased increased. palatal might help