Numerical Simulations of Unsteady Aerodynamic Flows Inside a Nasal Cavity with Functional Endoscopic Sinus Surgery

2011 ◽  
Author(s):  
Xiao Bing Chen ◽  
Heow Pueh Lee ◽  
Vincent Fook Hin Chong ◽  
De Yun Wang
Keyword(s):  
Numerical Simulations ◽  
Nasal Cavity ◽  
Endoscopic Sinus Surgery ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Unsteady Aerodynamic ◽  
Aerodynamic Flows

The early history and development of functional endoscopic sinus surgery

2019 ◽  
Vol 134 (1) ◽  
pp. 8-13
Author(s):  
K J Kane
Keyword(s):  
Twentieth Century ◽  
Nasal Cavity ◽  
Endoscopic Sinus Surgery ◽  
Functional Endoscopic Sinus Surgery ◽  
Early History ◽  
Sinus Surgery ◽  
Diagnosis And Management ◽  
The World ◽  
English Speaking

AbstractBackgroundThe concept of endoscopic diagnosis and procedures on the nasal cavity had been investigated for several decades in Europe in the early part of the twentieth century. It was Prof Walter Messerklinger and his assistant, Heinz Stammberger, with US colleague, David Kennedy, who brought the science and technique of functional endoscopic sinus surgery to the wider world.MethodsThe author, an English-speaking surgeon, was present at this movement from the commencement of its propagation, and has recorded the remarkable ascendency of this technique throughout the world.ConclusionThe technique revolutionised the diagnosis and management of intranasal, sinus and intracranial conditions.

Aerodynamic Characteristics inside the Rhino-Sinonasal Cavity after Functional Endoscopic Sinus Surgery

2011 ◽  
Vol 25 (6) ◽  
pp. 388-392 ◽  
Author(s):  
Xiao Bing Chen ◽  
Heow Pueh Lee ◽  
Vincent Fook Hin Chong ◽  
De Yun Wang
Keyword(s):  
Nasal Cavity ◽  
Maxillary Sinus ◽  
Endoscopic Sinus Surgery ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Airflow Rate ◽  
Nasal Airflow ◽  
Cfd Simulations ◽  
Inertia Effects ◽  
The Right

Background The aim of this study was to evaluate effects of functional endoscopic sinus surgery (FESS) on transient nasal aerodynamic flow patterns using computational fluid dynamics (CFD) simulations. Methods A three-dimensional model of the nasal cavity was constructed from CT scans of a patient with FESS interventions on the right side of the nasal cavity. CFD simulations were then performed for unsteady aerodynamic flow modeling inside the nasal cavity as well as the sinuses. Results Comparisons of the local velocity magnitude and streamline distributions inside the left and right nasal cavity and maxillary sinus regions were presented. Because of the FESS procedures in the right nasal cavity, existences and distributions of local circulations (vortexes) were found to be significantly different for the same nasal airflow rate but at different acceleration, deceleration, or quiet phases in the maxillary sinus region on the FESS side. Because of inertia effects, local internal airflow with circulation existences was continuous throughout the whole respiration cycle. With a larger peak inspiration flow rate, the airflow intensity inside the enlarged maxillary sinus increased significantly. Possible outcomes on functional performances of the nose were also examined and discussed. Conclusion Surgical enlargements of natural ostium of the maxillary sinus will change the aerodynamic patterns inside the main nasal cavity and maxillary sinus regions, which may affect normal nasal physiological functions. Local inertia effects play more important roles for the internal nasal airflow pattern changes and thus such conventional FESS procedures should be carefully planned.

scholarly journals Anatomy of Nasal Cavity and Paranasal Sinuses; Surgical Perspective

2020 ◽  
Vol 63 (5) ◽  
pp. 189-198
Author(s):  
Seung-Kyu Chung
Keyword(s):  
Surgical Treatment ◽  
Medical Treatment ◽  
Nasal Cavity ◽  
Chronic Rhinosinusitis ◽  
Paranasal Sinuses ◽  
Endoscopic Sinus Surgery ◽  
Treatment Method ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery

Endoscopic sinus surgery is a treatment method for chronic rhinosinusitis not controlled with medical treatment. It had started with functional endoscopic sinus surgery and the concept of reboot approach was introduced recently. For safe surgical treatment, understanding the anatomy especially personal variations between well-known structures is important. The practical points of surgical concept during endoscopic sinus surgery was suggested.

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.

Drug delivery in the nasal cavity after functional endoscopic sinus surgery: a computational fluid dynamics study

2012 ◽  
Vol 126 (5) ◽  
pp. 487-494 ◽  
Author(s):  
X B Chen ◽  
H P Lee ◽  
V F H Chong ◽  
D Y Wang
Keyword(s):  
Nasal Cavity ◽  
Maxillary Sinus ◽  
Endoscopic Sinus Surgery ◽  
Particle Deposition ◽  
Particle Diameter ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Airflow Rate ◽  
Sinus Cavity ◽  
The Right

AbstractBackground:Intranasal medication is commonly used for nasal disease. However, there are no clear specifications for intranasal medication delivery after functional endoscopic sinus surgery.Methods:A three-dimensional model of the nasal cavity was constructed from computed tomography scans of an adult Chinese male who had previously undergone functional endoscopic sinus surgery in the right nasal cavity. Computational fluid dynamic simulations modelled airflow and particle deposition, based on discrete phase models.Results:In the right nasal cavity, more particles passed through the upper dorsal region, around the surgical area, and streamed into the right maxillary sinus region. In the left cavity, particles were distributed more regularly and uniformly in the ventral region around the inferior turbinate. A lower inspiratory airflow rate and smaller initial particle velocity assisted particle deposition within the right maxillary sinus cavity. In the right nasal cavity, the optimal particle diameter was approximately 10−5 m for maxillary sinus cavity deposition and 3 × 10−6 m for bottom region deposition. In the right nasal cavity, altered back head tilt angles enhanced particle deposition in the top region of the surgical area, and altered right side head tilt angles helped enhance maxillary sinus cavity deposition.Conclusion:This model indicates that a moderate inspiratory airflow rate and a particle diameter of approximately 10−5 m should improve intranasal medication deposition into the maxillary sinus cavity following functional endoscopic sinus surgery.

Comparison of basal lamella relaxing incision and combined conventional medialisation and controlled synechiae in functional endoscopic sinus surgery: a randomised prospective study

2018 ◽  
Vol 132 (7) ◽  
pp. 605-610
Author(s):  
D D Maharaj ◽  
R S Virk ◽  
S Bansal ◽  
A K Gupta
Keyword(s):  
Prospective Study ◽  
Nasal Cavity ◽  
Endoscopic Sinus Surgery ◽  
Middle Turbinate ◽  
Single Step ◽  
Functional Endoscopic Sinus Surgery ◽  
The Other ◽  
Sinus Surgery ◽  
Smell Test

AbstractObjectivesTo compare combined conventional Freer medialisation and controlled synechiae, performed for middle meatal access (during the initial steps of functional endoscopic sinus surgery) and post-operative middle turbinate medialisation, with basal lamella relaxing incision, the latter of which is a single step for achieving both middle meatal access and post-operative medialisation. The study also compared the effects of controlled synechiae and basal lamella relaxing incision on post-operative olfaction.MethodA randomised prospective study was performed on 52 nasal cavity sides (32 patients). Only basal lamella relaxing incision was performed in one group, and both conventional medialisation and controlled synechiae were performed in the other. Intra-operative and post-operative photography was used to measure the middle meatal area. A pocket smell test was used to assess olfaction.ResultsThere were no significant differences in operative middle meatal access and post-operative medialisation of the middle turbinate. Post-operative olfaction was affected more in the combined conventional medialisation and controlled synechiae group, compared to the basal lamella relaxing incision group, but this finding was not statistically significant.ConclusionBasal lamella relaxing incision is an effective single-step technique for achieving adequate middle meatal access and post-operative medialisation, with no significant effect on olfaction.

Prevention of blood staining of endoscope tip during functional endoscopic sinus surgery: sleeve technique

2009 ◽  
Vol 123 (12) ◽  
pp. 1358-1359 ◽  
Author(s):  
G Kalra ◽  
J Keir ◽  
J Tahery
Keyword(s):  
Nasal Cavity ◽  
Nasal Mucosa ◽  
Endoscopic Sinus Surgery ◽  
Functional Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Endoscopic View ◽  
Deviated Septum ◽  
Bleeding Area

AbstractOptimisation of the endoscopic view during FESS may require correction of a deviated septum. The resulting incision leads to bleeding which could obscure the view of the endoscope. Repeated cleaning of the endoscope intraoperatively is time consuming and traumatisation of the lining of the nasal mucosa may lead to formation of adhesions post operatively.We discuss the use a segment of suction tubing that can act as a conduit or sleeve for the passage of the endoscope into the nasal cavity. This protects the endoscope tip from the bleeding area.

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