Swarts J D, Doyle B M Cullen, Doyle W J
Department of Otolaryngology, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pennsylvania, USA.
J Laryngol Otol. 2011 Jun;125(6):580-4. doi: 10.1017/S0022215110002811. Epub 2011 Jan 5.
The geometry of the adult human mastoid air cell system has not previously been described over a large range of mastoid air cell volumes.
Twenty subjects with a wide range of mastoid air cell pneumatised areas, as determined by X-ray, underwent computed tomography scanning of the middle ear. Mastoid air cell surface areas and volumes were then reconstructed from serial imaging sections, using Image J software.
Mastoid air cell volumes varied from 0.7 to 21.4 ml, and were linearly related to the pneumatised area. Right and left mastoid air cell volumes and surface areas were highly correlated. The mastoid air cell surface area was a linear function of volume.
The relationship between mastoid air cell surface area and volume is similar over a wide range of volumes. Given that the rate of gas exchange across the mastoid air cell mucosa is related to the mastoid air cell surface area, that rate will thus also be a direct linear function of the mastoid air cell volume.
此前尚未在较大范围的乳突气房体积内描述过成人人乳突气房系统的几何结构。
通过X射线确定20名乳突气房气化区域范围广泛的受试者接受中耳计算机断层扫描。然后使用Image J软件从连续成像切片重建乳突气房表面积和体积。
乳突气房体积从0.7至21.4毫升不等,且与气化区域呈线性相关。左右乳突气房体积和表面积高度相关。乳突气房表面积是体积的线性函数。
在广泛的体积范围内,乳突气房表面积与体积之间的关系相似。鉴于通过乳突气房黏膜的气体交换速率与乳突气房表面积相关,因此该速率也将是乳突气房体积的直接线性函数。