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The study is looking into the potential of using computational fluid dynamics(CFD) as a tool for predicting the outcome of surgery for alleviation ofobstructive sleep apnea syndrome (OSAS). From pre- and post-operative computedtomography (CT) of an OSAS patient, the pre- and post-operative geometries ofthe patient's upper airways were generated. CFD simulations of laminar flow inthe patient's upper airway show that after nasal surgery the mass flow is moreevenly distributed between the two nasal cavities and the pressure drop overthe nasal cavity has increased. The pressure change is contrary to clinicalmeasurements that the CFD results have been compared with, and this is mostlikely related to the earlier steps of modelling - CT acquisition and geometryretrieval.

Patient specific numerical simulation of flow in the human upper airways for assessing the effect of nasal surgery