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Analysis of Velopharyngeal Functions Using Computational Fluid Dynamics Simulations.

Hanyao Huang1, Xu Cheng1, Yang Wang2

  • 11 State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China.

The Annals of Otology, Rhinology, and Laryngology
|April 9, 2019
PubMed
Summary
This summary is machine-generated.

Understanding velopharyngeal (VP) function is key for speech. Computational fluid dynamics simulations reveal distinct airflow patterns for various VP closure states, aiding surgical planning for pharyngoplasty.

Keywords:
cleft palatecomputational fluid dynamicsvelopharyngeal insufficiency

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Speech Science

Background:

  • Competent velopharyngeal (VP) function is crucial for normal speech production.
  • Understanding the relationship between VP structure and airflow dynamics is essential for improving pharyngoplasty outcomes.

Purpose of the Study:

  • To elucidate airflow characteristics associated with different velopharyngeal closure states using computational dynamic simulations.
  • To correlate velopharyngeal port size with airflow parameters such as velocity and pressure.

Main Methods:

  • Three-dimensional upper airway models were created from CT scans of 8 volunteers.
  • The velopharyngeal port was modeled as a cylinder.
  • Computational fluid dynamics (CFD) simulations were employed to analyze airflow dynamics.

Main Results:

  • Airflow dynamics remained consistent up to a velopharyngeal port area of 25 mm².
  • Five distinct airflow patterns were identified, corresponding to varying degrees of VP closure (adequate to inadequate).
  • The maximum tolerable orifice area for adequate VP closure was found to be 2.01 mm².

Conclusions:

  • Distinct VP functions exhibit characteristic airflow dynamics.
  • CFD simulations show promise for personalized VP surgery planning.