Investigation on the nasal airflow characteristics of anterior nasal cavity stenosis
AUTOR(ES)
Wang, T., Chen, D., Wang, P.H., Chen, J., Deng, J.
FONTE
Braz J Med Biol Res
DATA DE PUBLICAÇÃO
01/08/2016
RESUMO
We used a computational fluid dynamics (CFD) model to study the inspiratory airflow profiles of patients with anterior nasal cavity stenosis who underwent curative surgery, by comparing pre- and postoperative airflow characteristics. Twenty patients with severe anterior nasal cavity stenosis, including one case of bilateral stenosis, underwent computed tomography (CT) scans for CFD modelling. The pre- and postoperative airflow characteristics of the nasal cavity were simulated and analyzed. The narrowest area of the nasal cavity in all 20 patients was located within the nasal valve area, and the mean cross-sectional area increased from 0.39 cm2 preoperative to 0.78 cm2 postoperative (P<0.01). Meanwhile, the mean airflow velocity in the nasal valve area decreased from 6.19 m/s to 2.88 m/s (P<0.01). Surgical restoration of the nasal symmetry in the bilateral nasal cavity reduced nasal resistance in the narrow sides from 0.24 Pa.s/mL to 0.11 Pa.s/mL (P<0.01). Numerical simulation of the nasal cavity in patients with anterior nasal cavity stenosis revealed structural changes and the resultant patterns of nasal airflow. Surgery achieved balanced bilateral nasal ventilation and decreased nasal resistance in the narrow region of the nasal cavity. The correction of nasal valve stenosis is not only indispensable for reducing nasal resistance, but also the key to obtain satisfactory curative effect.
Documentos Relacionados
- Angioleiomyoma of the Nasal Cavity
- Effects of hypercapnia and hypoxia on nasal vasculature and airflow resistance in the anaesthetized dog.
- Control of nasal vasculature and airflow resistance in the dog.
- Comparative morphometry of the nasal cavity in rats and mice.
- Chondro-osseous respiratory epithelial adenomatoid hamartoma of the nasal cavity