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鼓室成形术已广泛开展,远期疗效尚不理想,其原因颇多。本组以术后气导实用水平平均值低于30分贝以上者列为失败病例,就我院1977～1981年间42例失败病例的原因进行探讨,以求对提高疗效能有所帮助。一.鼓膜重建术的失败原因 1.术后鼓膜再次流脓穿孔,本组中有12例,占28.5％。其原因是:(1)术前鼓室炎症未彻底消除。12例中有6例干耳不足一个月,结果术后首次换药即见移植膜液化、水肿或移位而致穿孔。我们认为术前干耳以1～2月为宜。(2)前下区穿孔是较易发生的问题,尤其耳道前壁骨质突起而影响视野者更易
Tympanoplasty has been widely carried out, the long-term efficacy is not satisfactory, for many reasons. This group of postoperative airway practical average below 30 dB as a failure case, the hospital from 1977 to 1981, 42 cases of failure to explore the reasons in order to improve the efficacy of treatment is helpful. One eyelid reconstruction failure reasons 1. Postoperative eardrum again perforation, the group of 12 cases, accounting for 28.5%. The reason is: (1) preoperative tympanitis is not completely eliminated. 6 cases of 12 cases of dry ears less than a month, the results of the first postoperative dressing see the graft membrane liquefaction, edema or displacement caused by perforation. We think preoperative dry ears to January to February is appropriate. (2) the former under the perforation is more prone to problems, especially the anterior canal osseous protrusion affect visual field more easily