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先天性外耳及中耳畸形于术前对其畸变程度和范围进行判定,对手术的成功有助益。因颞骨内结构很小,故欲对其作解剖学评定甚为困难,而断层摄影术却能提供所需的信息。作者们于1962～1982年对47例(其中11例为双侧畸形)、58耳术前进行了断层摄影检查。前十年用线性断层,尔后则用内摆线断层。男27例,女20例,年龄0～2岁的14例,3～6岁23例,2～12岁的10例。近年来2岁以内的病例增多,可能是因医生们对此问题有了更多认识并更加注意。选用Phelps等人的分型法、将畸形分成4度。Ⅰ度,仅有听骨畸形。Ⅱ度,外耳道狭窄或有薄的骨板闭锁,鼓室腔大小正常。Ⅲ度,外耳道闭锁,鼓
Congenital auricle and middle ear deformity in the preoperative distortion of the extent and scope of the judge, the success of the operation is helpful. Due to the small intramedullary structure, it is difficult to assess their anatomy, while tomography provides the information they need. The authors examined 47 patients (11 of them bilateral deformities) from 1962 to 1982 and had 58 preoperatively underwent tomography. The first ten years with a linear fault, then use hypocycloidal fault. There were 27 males and 20 females, 14 cases were 0-2 years old, 23 cases were 3-6 years old and 10 cases were 2-12 years old. In recent years, there are more cases of patients within 2 years of age, probably because doctors have more knowledge and pay more attention to this issue. Use Phelps et al’s classification method, the deformity is divided into 4 degrees. Ⅰ degree, only the bone deformity. Ⅱ degree, external auditory canal stenosis or thin plate lock, tympanic cavity size normal. Ⅲ degree, external auditory canal atresia, drums