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本文通过66例复发性慢性中耳炎再次乳突手术所见,分析了第一次手术失败的原因。66例手术中去除外耳道后壁的乳突切除术56例,保留外耳道后壁的10例。因胆脂瘤复发需要再次手术的分别为23例(41%)和7例(70%);因未开放气房内有肉芽组织的分别为56例(100%)和7例(70%)。未开放气房的部位主要是天盖、窦脑膜角、乳突尖及面神经隐窝;尤其是天盖(占总数的41%,占无胆脂瘤的64%)及窦脑膜角(占总数的38%,占无胆脂瘤的58%)。作者指出:在手术中病人低头位有利于去除天盖的气房,因为颞部骨皮质悬垂可能掩蔽这些
In this paper, 66 cases of recurrent chronic otitis media seen again mastoid surgery, the analysis of the reasons for the failure of the first surgery. Sixty-six cases of mastoid excision of the posterior wall of external auditory canal were removed in 66 cases, and 10 cases of posterior wall of external auditory canal were preserved. 23 (41%) and 7 (70%) patients required reoperation because of the recurrence of cholesteatoma, respectively; 56 (100%) and 7 (70%) patients had granulation tissue in the open air chamber, . Unopened parts of the main room is the canopy, sinus membrane angle, mastoid tip and facial nerve recess; especially the canopy (accounting for 41% of the total, accounting for 64% of cholesteatoma) and the sinonasal angle (accounting for the total Of 38%, accounting for 58% of cholesteatoma). The authors note that the lower head position of the patient during surgery is good for removing the gland of the canopy because the temporal cortical drape may mask these