Abstract
Objective:To investigate the pre- and post-operative intranasal airflow characteristics on nasal septum deviation and the correlation between subjective nasal patency and airflow characteristics by numerical simulation. Method:Forty-two nasal septum deviation cases were enrolled in this study. Pre- and post-operative VAS score of subjective nasal patency were recorded. We created computational fluid dynamics (CFD) nasal cavity airway models based on computed tomography and investigated the pre- and post-operative intranasal airflow characteristics. Result:Postoperative subjective nasal patency on patients with septal deviation showed significant improvement than preoperative (P<0.01). The intranasal airflow on deviated side nasal cavity increased from preoperative (34.94±14.82)% to postoperative (47.67±3.58)% (P<0.01). The parameters of ΔP(anterior inferior turbinate),ΔT(anterior inferior turbinate) and ΔT(posterior end of the septum)decreased significantly from preoperative (7.657±4.839)Pa to postoperative (4.500±2.403)Pa,preoperative (8.482±1.767)K to postoperative (7.096±1.127)K,and preoperative (11.386±0.505)K to postoperative (10.895±0.736)K respectively (P<0.01). The value of NR₁ decreased from (0.043±0.021) Pa•s/ml to (0.038 0±0.016) Pa•s/ml, showed statistically significant difference (P<0.05), but the value of NR₂ decreased from (0.071 0±0.035)Pa•s/ml to (0.061 5±0.048) Pa•s/ml, showed no statistically significant difference (P>0.05). The related degree of subjective nasal patency VAS score on ΔT(anterior inferior turbinate) and intranasal airflow of deviated side nasal cavity are higher (R²=0.619 6 and R²=0.508 7)than ΔP(anterior inferior turbinate)and NR₂(R²=0.326 7 and R²=0.298 1).It suggested that there is no correlation between subjective nasal patency VAS score and ΔT(posterior end of the septum),NR₁ (R²=0.0451 and R²=0.0721). Conclusion:It showed different pressure and temperature gradient in bilateral nasal cavity of nasal septal deviation. The septoplasty improved the patient's feeling of subjective nasal patency, and recovered the balance of the airflow distribution on bilateral nasal cavity. By correlation analysis, we concluded that nasal resistance could not represent the severity of subjective nasal patency, but the intranasal airflow showed good correlations with subjective nasal patency, especially the temperature drop in mucous membrane at the nasal front end is more sensitive to reflect subjective nasal patency feeling.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology, head, and neck surgery
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.