Airflow of the Two-Port Velopharyngeal Closure: Study Using Computational Fluid Dynamics
| Autor: | Heng Yin, Bing Shi, Xing Yin, Dantong Huang, Chengdan Deng, Qian Zheng, Rui Liao, Hanyao Huang, Nan Chen, Jingtao Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male medicine.medical_treatment Spiral computed tomography scan Airflow Closure (topology) Nose Computational fluid dynamics Young Adult 03 medical and health sciences 0302 clinical medicine Humans Medicine Computer Simulation 030223 otorhinolaryngology Pharyngeal flap business.industry 030206 dentistry General Medicine Plastic Surgery Procedures Cleft Palate Palatoplasty Otorhinolaryngology Hydrodynamics Pharynx Female Surgery Airway business Tomography Spiral Computed Body orifice Biomedical engineering |
| Zdroj: | Journal of Craniofacial Surgery. 31:2188-2192 |
| ISSN: | 1536-3732 1049-2275 |
| DOI: | 10.1097/scs.0000000000006772 |
| Popis: | Posterior pharyngeal flap palatoplasty is used to restore the function of velopharyngeal (VP) closure, after which 2 ports remain between the nasal and oral cavity. The authors hypothesized that the airflow dynamics of the upper airway is different in PPF patients compared to health subjects, who only has 1 movable port. Twenty adults who have multislice spiral computed tomography scan were included in this study. Two cylinders (radius, 2.00 mm; height, 4.5 mm) were used to recapitulate the 2-port VP structure after PPF palatoplasty. The areas of ports were modified by changing the radius of 2 cylinders. Real-time computational fluid dynamics simulation was used to capture the airflow velocity and pressures through the 2 ports. The airflow velocity and pressure of upper airway were recorded as the total areas of 2 VP ports increased. The total orifice areas of the 2-port VP closure for 4 VP conditions, including adequate closure, adequate/borderline closure, borderline/inadequate closure, and inadequate closure, were demonstrated. Significant differences between the 2-port VP function for demonstrating PPF reconstruction and the 1-port VP function were found. Airflow dynamics is dependent on the VP structure. The 2-port airflow model for mimicking VP closure after PPF palatoplasty demonstrated airflow characteristics that were significantly different from the 1-port model in normal VP closure. |
| Databáze: | OpenAIRE |
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