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现代耳科手术的目的是清除病变和重建听力。据 Ohrt 报导,乳突根治术后出现持续或间歇性流脓需再次手术的为56%;其中胆脂瘤复发占38%,术中行耳道后壁凿低而出现胆脂瘤的占41%,外耳道后壁保留者则占70%;常见的手术不彻底区域为乳突尖、颧弓、侧窦后区、乳突天盖、乙状窦角等部位。Bocca 强调术中应清理所有的乳突周围的气房,如清理气房不彻底,可使留下的乳突气房被填充手术腔的肉芽分隔,气房中的空气最终被吸收,变为分泌性病变,乳突腔因而变湿润,促使细菌和霉菌生长。持续流脓常见的原因是乳突天盖和
The purpose of modern otology surgery is to clear the lesions and rebuild the hearing. According to Ohrt, 56% of patients undergoing reoperation after radical mastoidectomy were treated with recurrence or intermittent emptysis, of which cholesteatoma accounted for 38% of the recurrences. In the postoperative period, the posterior wall of the ear canal was low and cholelithiasis was 41% , While the posterior wall of the external auditory canal retains 70%; common operation is not complete areas of mastoid tip, zygomatic arch, lateral sinus area, mastoid canopy, sigmoid sinus and other parts. Bocca emphasizes that during surgery, all the air spaces around the mastoid should be cleaned up. If the cleaning of the air chamber is not complete, the remaining mastoid air chamber is separated by the granulation that fills the operating chamber. The air in the air chamber is finally absorbed and becomes Secretory lesions, mastoid cavity and thus become humid, to promote the growth of bacteria and mold. The most common cause of persistent pus is mastoid lid and