鼓室成形术前测定46耳的开放压和关闭压,了解咽鼓管功能状况,以之与手术疗效相比较,其中,开放压在250mmH_2O以下者22耳,手术成功21耳,成功率为95.5％;开放压为251～360mmH_2O及>360mmH_2O尚不能开放者24耳,手术成功17耳,成功率为70.8％。关闭压<+40mmH_2O的20耳均取得成功;关闭压较高者与手术效果无确定关系。因此,术前用声导纳仪测试患者的咽鼓管功能有助于选择病例,估计预后。 46 cases of tympanoplasty before the open pressure and the closure of the pressure to understand the eustachian tube function, compared with the surgical efficacy, open pressure below 250mmH_2O in 22 ears, the successful operation of 21 ears, the success rate was 95.5% ; Open pressure of 251 ~ 360mmH_2O and> 360mmH_2O still can not open 24 ears, successful operation 17 ears, the success rate of 70.8%. Closure pressure <+40 mmH_2O of 20 ears were successful; the higher the closing pressure and the surgical effect is not sure. Therefore, preoperative assessment of patients with eustachian tube Eustachian tube function will help to select the case, the prognosis.