Numerical flow simulation in the post-endoscopic sinus surgery nasal cavity
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In this study we utilized computational fluid dynamic (CFD) techniques to construct a numerical simulation of nasal cavity airflow pre and post virtual functional endoscopic surgery (FESS). A healthy subject was selected, and CFD techniques were then applied to construct an anatomically and proportionally accurate three-dimensional nasal model based on nasal CT scans. A virtual FESS intervention was performed numerically on the normal nasal model using Fluent software. Navier-Stokes and continuity equations were used to calculate and compare airflow, velocity, distribution and pressure in both the pre and post FESS models. In the post-FESS model, there was an increase in airflow distribution in the maxillary, ethmoid and sphenoid sinuses, and a 13% increase through the area connecting the middle meatus and the surgically opened ethmoid. There was a gradual decrease in nasal resistance in the posterior ethmoid sinus region following FESS. These findings highlight the potential of this technique as a powerful preoperative assessment tool to aid clinical decision-making.
KeywordsFunctional endoscopic sinus surgery Computational fluid dynamics Laminar nasal airflow Three dimensional reconstruction Nasal cavity
This research was supported by grant number 5010 from the Clinical Medicine Research board of Sun Yat-Sen University.
- 1.Belleman RG, Sloot PMA (2001) Simulated vascular reconstruction in a virtual operating theatre. In: Lemke HU, Vannier MW, Inamura K, Farman AG, Doi K (eds) Computer assisted radiology and surgery (Excerpta Medica, International Congress Series1230). Elsevier, Berlin, pp 938–944Google Scholar
- 5.Girardin M, Bilgen E, Arbour P (1983) Experimental study of velocity fields in a human nasal fossa by laser anemometry. Ann Otol Rhinol Laryngol 92:231–236Google Scholar
- 6.Hahn I, Scherer PW, Mozell MM (1993) Velocity profiles measured for airflow through a large-scale model of the human nasal cavity. J Appl Physiol 75:2273–2287Google Scholar
- 7.Hornung DE, Leopold DA, Youngentob SL et al (1987) Airflow patterns in a human nasal model. Arch Otolaryngol Head Neck Surg 113:169–172Google Scholar
- 13.Proctor DF (1982) The upper airway. In: Proctor DF, Anderson IB (eds) The nose: upper airway physiology and the atmospheric environment.Elsevier, New York, pp 23–42Google Scholar
- 14.Proetz AW (1952) Air currents in the upper respiratory tract and their clinical importance. Trans Am Laryngol Rhinol Otol Soc 53:73–103Google Scholar
- 17.Wang K, Denney T, Morrison E, Vodyanoy V (2005) Numerical simulation of air flow in the human nasal cavity. Conf Proc IEEE Eng Med Biol Soc 6:5607–5610Google Scholar