湍流状态下鼻腔的几何尺寸与鼻腔阻塞系数的关系

研究正常成年人的鼻腔气道几何尺寸和鼻腔通气程度的关系,对17个志愿者进行鼻阻力测试,并对测试数据进行函数拟合确定鼻腔的阻塞系数.对每个志愿者的鼻腔进行CT扫描,提取每一层CT图像的鼻腔结构的几何数据,如鼻腔气道截面积和截面周长等.对鼻腔阻塞系数和鼻腔结构几何数据进行分析对比,建立气道几何数据与阻塞系数的关系,并确定其中的待定系数.结果表明,可以通过鼻腔气道的截面积、气道长度、湿周长等几何尺寸大致确定鼻腔的通气程度.

Correlation of nasal cavity geometry dimensions and nasal obstruction coefficients in turbulence airflow

The relationship between nasal airway dimension of normal adults and the degree of nasal obstruction is investigated.The nasal airway resistances of 17 volunteers are measured through active anterior rhinomanomety.Curve fitting for the rhinomanometer data is performed to find the obstruction coefficient of nasal airway.Computed tomography(CT) coronal scans for nasal cavities of volunteers are performed.We obtain the geometry dimensions of the nasal cavities from each CT image such as area and perimeter of coronal section of nasal airway.Nasal obstruction degree is considered as a function of the nasal airway dimensions and the function contains an undetermined coefficient.The undetermined coefficient is identified by curves fitting for the data of geometry dimensions and obstruction coefficients of the 17 nasal cavities.It can be concluded that the nasal obstruction coefficient can be identified by geometry dimensions of nasal cavity such as nasal coronal section area,length of nasal airway and perimeter of coronal section of nasal airway.