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Numerical flow simulation in the post-endoscopic sinus surgery nasal cavity.

Guanxia Xiong1, Jiemin Zhan, Kejun Zuo

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Computational fluid dynamics (CFD) simulations reveal improved airflow to sinuses after virtual functional endoscopic sinus surgery (FESS). This technique can help surgeons plan procedures for better patient outcomes.

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Area of Science:

  • Biomedical Engineering
  • Computational Fluid Dynamics
  • Otolaryngology

Background:

  • Functional endoscopic sinus surgery (FESS) aims to improve sinonasal ventilation.
  • Preoperative assessment of sinonasal airflow is crucial for surgical planning.
  • Computational Fluid Dynamics (CFD) offers a non-invasive method to analyze airflow dynamics.

Purpose of the Study:

  • To simulate and compare nasal cavity airflow before and after a virtual FESS using CFD.
  • To evaluate the impact of virtual FESS on airflow distribution, velocity, and pressure.
  • To assess the potential of CFD as a preoperative planning tool for FESS.

Main Methods:

  • Anatomically accurate 3D nasal model created from CT scans of a healthy subject.
  • Virtual FESS performed numerically using Fluent software.
  • Navier-Stokes and continuity equations applied to analyze airflow parameters.

Main Results:

  • Increased airflow distribution observed in maxillary, ethmoid, and sphenoid sinuses post-virtual FESS.
  • A 13% increase in airflow through the middle meatus to the surgically opened ethmoid.
  • Gradual decrease in nasal resistance noted in the posterior ethmoid sinus region.

Conclusions:

  • CFD simulation accurately models sinonasal airflow changes after FESS.
  • Virtual FESS analysis demonstrates improved sinus ventilation and reduced nasal resistance.
  • CFD holds significant potential as a preoperative assessment tool for FESS planning.