caa a22 4500 606187294 CHVBK 20210128100840.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00405-014-3438-z doi (NATIONALLICENCE)springer-10.1007/s00405-014-3438-z Effects of nasal septum perforation repair surgery on three-dimensional airflow: an evaluation using computational fluid dynamics [Elektronische Daten] [Tsutomu Nomura, Munetaka Ushio, Kenji Kondo, Tatsuya Yamasoba] The purpose of this research is to determine the cause of nasal perforation symptoms and to predict post-operative function after nasal perforation repair surgery. A realistic three-dimensional (3D) model of the nose with a septal perforation was reconstructed using a computed tomography (CT) scan from a patient with nasal septal defect. The numerical simulation was carried out using ANSYS CFX V13.0. Pre- and post-operative models were compared by their velocity, pressure gradient (PG), wall shear (WS), shear strain rate (SSR) and turbulence kinetic energy in three plains. In the post-operative state, the crossflows had disappeared, and stream lines bound to the olfactory cleft area had appeared. After surgery, almost all of high-shear stress areas were disappeared comparing pre-operative model. In conclusion, the effects of surgery to correct nasal septal perforation were evaluated using a three-dimensional airflow evaluation. Following the surgery, crossflows disappeared, and WS, PG and SSR rate were decreased. A high WS.PG and SSR were suspected as causes of nasal perforation symptoms. Springer-Verlag Berlin Heidelberg, 2014 Nasal septal perforation nationallicence Airflow evaluation nationallicence Numerical simulation nationallicence Nomura Tsutomu Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut Ushio Munetaka Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut Kondo Kenji Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut Yamasoba Tatsuya Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/11(2015-11-01), 3327-3333 0937-4477 272:11<3327 2015 272 405 https://doi.org/10.1007/s00405-014-3438-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-014-3438-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nomura Tsutomu Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Ushio Munetaka Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Kondo Kenji Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Yamasoba Tatsuya Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/11(2015-11-01), 3327-3333 0937-4477 272:11<3327 2015 272 405