scholarly journals Computational Fluid Dynamics to Evaluate the Effectiveness of Inferior Turbinate Reduction Techniques to Improve Nasal Airflow

2018 ◽  
Vol 20 (4) ◽  
pp. 263-270 ◽  
Author(s):  
Thomas S. Lee ◽  
Parul Goyal ◽  
Chengyu Li ◽  
Kai Zhao
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Inferior Turbinate ◽  
Nasal Airflow ◽  
Reduction Techniques ◽  
Turbinate Reduction

scholarly journals An investigation of computational fluid dynamics of human nasal airflow using LS-DYNA®

2020 ◽  
Vol 884 ◽  
pp. 012111
Author(s):  
V N Riazuddin ◽  
C C Chen ◽  
Ahmad Faridzul ◽  
M A Jasni ◽  
J Chen
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Nasal Airflow

scholarly journals Characterization of Postoperative Changes in Nasal Airflow Using a Cadaveric Computational Fluid Dynamics Model

2014 ◽  
Vol 16 (5) ◽  
pp. 319-327 ◽  
Author(s):  
Scott Shadfar ◽  
William W. Shockley ◽  
Gita M. Fleischman ◽  
Anand R. Dugar ◽  
Kibwei A. McKinney ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Nasal Airflow ◽  
Dynamics Model ◽  
Computational Fluid Dynamics Model ◽  
Postoperative Changes

scholarly journals Aerodynamic effects of inferior turbinate surgery on nasal airflow--a computational fluid dynamics model

2010 ◽  
Vol 48 (4) ◽  
pp. 394-400
Author(s):  
X.B. Chen ◽  
S.C. Leong ◽  
H.P. Lee ◽  
V.F.H. Chong ◽  
D.Y. Wang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Middle Turbinate ◽  
Inferior Turbinate ◽  
Atrophic Rhinitis ◽  
Single Individual ◽  
Cfd Simulations ◽  
Wall Shear

BACKGROUND: Turbinate reduction surgery may be indicated for inferior turbinate enlargement when conservative treatment fails. The aim of this study was to evaluate the effects of inferior turbinate surgery on nasal aerodynamics using computational fluid dynamics (CFD) simulations. METHODS: CFD simulations were performed for the normal nose, enlarged inferior turbinate and following three surgical procedures: (1) resection of the lower third free edge of the inferior turbinate, (2) excision of the head of the inferior turbinate and (3) radical inferior turbinate resection. The models were constructed from MRI scans of a healthy human subject and a turbulent flow model was used for the numerical simulation. The consequences of the three turbinate surgeries were compared with originally healthy nasal model as well as the one with severe nasal obstruction. RESULTS: In the normal nose, the bulk of streamlines traversed the common meatus adjacent to the inferior and middle turbinate in a relatively vortex free flow. When the inferior turbinate was enlarged, the streamlines were directed superiorly at higher velocity and increased wall shear stress in the nasopharynx. Of the three surgical techniques simulated, wall shear stress and intranasal pressures achieved near-normal levels after resection of the lower third. In addition, airflow streamlines and turbulence improved although it did not return to normal conditions. As expected, radical turbinate resection resulted in intra-nasal aerodynamics of atrophic rhinitis demonstrated in previous CFD studies. CONCLUSION: There is little evidence that inspired air is appropriately conditioned following radical turbinate surgery. Partial reduction of the hypertropic turbinate results in improved nasal aerodynamics, which was most evident following resection of the lower third. The results were based on a single individual and cannot be generalised without similar studies in other subjects.

scholarly journals Nasal airflow in the pygmy slow loris (Nycticebus pygmaeus) based on a combined histological, computed tomographic and computational fluid dynamics methodology

2019 ◽  
Vol 222 (23) ◽  
pp. jeb207605 ◽  
Author(s):  
Timothy D. Smith ◽  
Brent A. Craven ◽  
Serena M. Engel ◽  
Christopher J. Bonar ◽  
Valerie B. DeLeon
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Nasal Airflow ◽  
Slow Loris ◽  
Computed Tomographic

An Overview of Computational Fluid Dynamics Preoperative Analysis of the Nasal Airway

2021 ◽  
Author(s):  
Rui Xavier ◽  
Dirk-Jan Menger ◽  
Henrique Cyrne de Carvalho ◽  
Jorge Spratley
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Surgical Techniques ◽  
Virtual Surgery ◽  
Nasal Airway ◽  
Cfd Analysis ◽  
Nasal Airflow ◽  
Nasal Breathing ◽  
Objective Measurements ◽  
Patient Reported

AbstractEvaluation of the nasal airway is crucial for every patient with symptoms of nasal obstruction as well as for every patient with other nasal symptoms. This assessment of the nasal airway comprises clinical examination together with imaging studies, with the correlation between findings of this evaluation and symptoms reported by the patient being based on the experience of the surgeon. Measuring nasal airway resistance or nasal airflow can provide additional data regarding the nasal airway, but the benefit of these objective measurements is limited due to their lack of correlation with patient-reported evaluation of nasal breathing. Computational fluid dynamics (CFD) has emerged as a valuable tool to assess the nasal airway, as it provides objective measurements that correlate with patient-reported evaluation of nasal breathing. CFD is able to evaluate nasal airflow and measure variables such as heat transfer or nasal wall shear stress, which seem to reflect the activity of the nasal trigeminal sensitive endings that provide sensation of nasal breathing. Furthermore, CFD has the unique capacity of making airway analysis of virtual surgery, predicting airflow changes after trial virtual modifications of the nasal airway. Thereby, CFD can assist the surgeon in deciding surgery and selecting the surgical techniques that better address the features of each specific nose. CFD has thus become a trend in nasal airflow assessment, providing reliable results that have been validated for analyzing airflow in the human nasal cavity. All these features make CFD analysis a mainstay in the armamentarium of the nasal surgeon. CFD analysis may become the gold standard for preoperative assessment of the nasal airway.

Use of computational fluid dynamics to study the influence of the uncinate process on nasal airflow

2010 ◽  
Vol 125 (1) ◽  
pp. 30-37 ◽  
Author(s):  
G-X Xiong ◽  
J-M Zhan ◽  
K-J Zuo ◽  
L-W Rong ◽  
J-F Li ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Nasal Cavity ◽  
Paranasal Sinuses ◽  
Endoscopic Sinus Surgery ◽  
Uncinate Process ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Nasal Airflow ◽  
Before And After

AbstractBackground:Chronic rhinosinusitis is commonly treated by functional endoscopic sinus surgery involving excision of the uncinate process and opening of the osteomeatal complex.Methods:Computational fluid dynamics were used to compare nasal airflow after two different surgical interventions which involved opening the paranasal sinuses, excising the ethmoid sinus, and excising or preserving the uncinate process, in a cadaveric head model. Cross-sectional computed tomography images were obtained before and after the interventions. Imaging data were used to prepare computer simulations, which were used to assess the airflow characteristics of the nasal cavities and paranasal sinuses during inspiration and expiration, before and after intervention.Results:Significantly larger nasal cavity airflow velocity changes were apparent following the uncinate process excising procedure. Nasal cavity airflow distribution remained relatively unchanged following the uncinate process preserving procedure. There was a significantly greater increase in airflow volume following the uncinate process excising procedure, compared with the uncinate process preserving procedure.Conclusion:Preservation of the uncinate process may significantly reduce the alteration of nasal cavity airflow dynamics occurring after functional endoscopic sinus surgery for chronic rhinosinusitis.

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