慢性中耳炎に対する内視鏡下の鼓室形成術Ⅰ型の検討

Introduction: Minimally invasive tympanoplasty (MIT) is defined in this study as an endoscopic endaural tympanoplasty, involving only a small skin incision for procuring graft and no large incision of the posterior external auditory canal. MIT has several advantages as compared to conventional tympa...

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Published inJIBI INKOKA TEMBO Vol. 59; no. 1; pp. 19 - 25
Main Authors 佐々木 優子, 枝松 秀雄
Format Journal Article
LanguageJapanese
Published Society of Oto-rhino-laryngology Tokyo 2016
耳鼻咽喉科展望会
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ISSN0386-9687
1883-6429
DOI10.11453/orltokyo.59.1_19

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Summary:Introduction: Minimally invasive tympanoplasty (MIT) is defined in this study as an endoscopic endaural tympanoplasty, involving only a small skin incision for procuring graft and no large incision of the posterior external auditory canal. MIT has several advantages as compared to conventional tympanoplasty (CT) carried out using a surgical microscope. Material & Methods: We have performed type I tympanoplasty in 80 patients with chronic otitis media from January 2008 through December 2011. The patients' backgrounds and postoperative results were compared between 28 ears treated by MIT and 52 ears operated by CT. The number of MITs gradually increased to surpass the number of CTs from the year 2010. The width of the external auditory canal was measured by preoperative CT to determine whether the 2.7-mm-wide endoscope could be used for the endaural tympanoplasty. Results: The postoperative results in terms of the perforation closure rate, re-perforation rate, hearing improvement and operation time were similar between the cases treated by MIT and those treated by CT. The 2.7-mm-wide endoscope could be used in all cases, including all adults and all children. The endoscopic operative view was wider and clearer in MIT than in CT. Conclusion: MIT represents an endoaural approach for the treatment of tympanic perforation, involving only a small skin incision for fascial graft procurement and is applicable even to pediatric patients. MIT is less traumatic and provides a clearer operative view, and is therefore very useful and expected to be used increasingly widely in ear surgery.  慢性中耳炎 (慢性穿孔性中耳炎) の手術に, 内視鏡を使用する侵襲の少ない Minimally invasive tympanoplasty (MIT) を導入し, 有用性を検討した。 著者らは MIT を, 従来の顕微鏡法で行われる耳後部切開と外耳道後壁皮膚の剥離による術野の確保は行わず, 皮膚切開は耳上部の筋膜採取に止め, 内視鏡下に経外耳道的に行う鼓室形成術と定義した。 2008年1月から2011年12月までの4年間に, 当科で行った慢性中耳炎に対する鼓室形成術Ⅰ型80耳を対象とした。 MIT 群28耳と従来の顕微鏡下鼓室形成術 Conventional tympanoplasty (CT) 群52耳で患者背景と手術成績などを比較した。 MIT を行うために内視鏡の挿入が可能となる外耳道の広さを手術前の側頭骨 CT で測定した。 MIT の術後成績は CT とほぼ同等であったが, 視野の確保が困難な鼓膜大穿孔例などでは, CT よりも良好な成績であった。 また MIT は外耳道の狭い小児手術にも適応可能であった。 MIT は低侵襲手術が可能であり, 今後の展開が期待できる有用な手術法であると判断された。
ISSN:0386-9687
1883-6429
DOI:10.11453/orltokyo.59.1_19