External Ear Plastic and Reconstructive Center, Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 33, Ba-Da-Chu Road, Shi Jing Shan District, Beijing, 100144, China.
Sci Rep. 2022 Mar 16;12(1):4521. doi: 10.1038/s41598-022-08596-0.
The tissue expansion technique is the most suitable procedure for Chinese patients with microtia. However, it is difficult to determine whether the expanded flap is sufficient, and there are no clear or objective guidelines for determining the volume of the expander for different sizes of auricles. One hundred patients with unilateral microtia who visited our department in 2021 were randomly selected for auricular data collection using 3D scanning. The auricle length, width, projection, perimeter, and surface area were measured. Eight different volumes of expanders underwent CT and the surface areas of these expanders were measured. The surface areas of the auricles and expanders were compared and the correlation between them was explored. The average auricle parameters were calculated. The scatter plot showed a linear relationship between auricle length and auricle surface area (R = 0.9913), which demonstrated that the auricle area was approximately equal to the auricle length multiplied by 76.921. Additionally, the surface area of the expanders was measured and made into a table for selection against the surface area of the auricles. Using our equation, the auricle surface could be estimated by simply measuring the non-defective auricle length; therefore, the suitable volume of the expander could be determined.
组织扩张技术是最适合中国小耳症患者的手术方法。然而，很难确定扩张后的皮瓣是否足够，并且对于不同大小的耳廓，确定扩张器的体积也没有明确或客观的指导方针。2021 年，我们科室随机选择了 100 名单侧小耳症患者进行 3D 扫描获取耳部数据。测量耳廓的长度、宽度、突出度、周长和表面积。对 8 种不同体积的扩张器进行 CT 扫描并测量其表面积。比较耳廓和扩张器的表面积，并探讨它们之间的相关性。计算平均耳廓参数。散点图显示耳廓长度和耳廓表面积之间存在线性关系（R=0.9913），表明耳廓面积大约等于耳廓长度乘以 76.921。此外，还测量了扩张器的表面积，并制成表格以与耳廓表面积相对照进行选择。使用我们的方程，只需测量非缺损耳廓的长度即可估算耳廓表面积，从而确定合适的扩张器体积。
