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        全程面神經(jīng)監(jiān)測(cè)在聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)保護(hù)的應(yīng)用研究

        2017-11-01 07:04:08宋海民吳至武馮開(kāi)明羅德芳蔣秋華
        中國(guó)全科醫(yī)學(xué) 2017年29期
        關(guān)鍵詞:聽(tīng)神經(jīng)肌電圖面神經(jīng)

        宋海民,吳至武,馮開(kāi)明,羅德芳,蔣秋華

        ·論著· ·全科醫(yī)生技能發(fā)展·

        全程面神經(jīng)監(jiān)測(cè)在聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)保護(hù)的應(yīng)用研究

        宋海民,吳至武,馮開(kāi)明,羅德芳,蔣秋華*

        目的研究全程面神經(jīng)監(jiān)測(cè)即術(shù)前應(yīng)用磁共振彌散張量成像(DTI)技術(shù)行面神經(jīng)成像、術(shù)中聯(lián)合面神經(jīng)電生理監(jiān)測(cè)技術(shù),探討其在聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)保護(hù)的意義。方法選取2016年1月—2017年1月南昌大學(xué)附屬贛州醫(yī)院收治的聽(tīng)神經(jīng)瘤患者11例,術(shù)前采用面神經(jīng)DTI顯示腫瘤與面神經(jīng)的關(guān)系,術(shù)中行面神經(jīng)動(dòng)態(tài)、電刺激肌電圖,并檢驗(yàn)DTI對(duì)面神經(jīng)的定位準(zhǔn)確與否,術(shù)后評(píng)估面神經(jīng)功能。結(jié)果11例聽(tīng)神經(jīng)瘤面神經(jīng)可通過(guò)DTI技術(shù)顯示,面神經(jīng)均位于腫瘤腹側(cè),7例位于腫瘤中部1/3,2例位于腫瘤下部1/3,2例位于腫瘤上部1/3,術(shù)前定位結(jié)果與術(shù)中所見(jiàn)吻合率為100%。10例腫瘤全部切除,1例內(nèi)聽(tīng)道部分腫瘤殘余。術(shù)中面神經(jīng)動(dòng)態(tài)肌電圖監(jiān)測(cè)可提示及定位面神經(jīng),11例面神經(jīng)均解剖保留,保留率為100%。術(shù)后隨訪1~12個(gè)月,面神經(jīng)功能House-Brackmann Ⅰ級(jí)4例,Ⅱ級(jí)6例,Ⅲ級(jí)1例。結(jié)論通過(guò)術(shù)前面神經(jīng)DTI和術(shù)中神經(jīng)電生理監(jiān)測(cè)的全程監(jiān)測(cè)技術(shù),有助于術(shù)中定位和保護(hù)面神經(jīng),可提高聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)的解剖及功能保留率。

        神經(jīng)瘤,聽(tīng);面神經(jīng);彌散磁共振成像;電生理學(xué)監(jiān)測(cè)

        聽(tīng)神經(jīng)瘤在顱內(nèi)腫瘤中的發(fā)病率位居第4位,僅次于膠質(zhì)瘤、腦膜瘤、垂體瘤,隨著對(duì)腫瘤病理解剖的認(rèn)識(shí)加深和術(shù)中電生理監(jiān)測(cè)技術(shù)的廣泛應(yīng)用,聽(tīng)神經(jīng)瘤手術(shù)死亡率已不足0.5%[1],但術(shù)后面癱嚴(yán)重影響患者生活質(zhì)量,尤其是在大型聽(tīng)神經(jīng)瘤術(shù)后[2]。因此功能保留逐漸成為治療的首要目標(biāo),在聽(tīng)神經(jīng)瘤中,正常的面神經(jīng)因腫瘤的擠壓、推擠后形態(tài)及位置發(fā)生改變,早期手術(shù)面神經(jīng)的辨認(rèn)和保護(hù)主要靠術(shù)中的解剖標(biāo)志、術(shù)者的經(jīng)驗(yàn)等,準(zhǔn)確率不佳,本研究擬采用全程監(jiān)測(cè),即術(shù)前面神經(jīng)磁共振(MRI)彌散張量成像(diffusion tensor imaging,DTI)技術(shù),明確面神經(jīng)與腫瘤相對(duì)位置關(guān)系,并在術(shù)中電生理監(jiān)測(cè)確定并加以驗(yàn)證,探討該方法對(duì)面神經(jīng)術(shù)中定位和功能保護(hù)的意義。

        1 資料與方法

        1.1 臨床資料 選取2016年1月—2017年1月南昌大學(xué)附屬贛州醫(yī)院收治的聽(tīng)神經(jīng)瘤患者11例,其中男4例,女7例;年齡38~68歲,平均年齡(44.5±8.4)歲;病程2個(gè)月~20年;均聽(tīng)力下降,聽(tīng)力喪失2例;2例術(shù)前輕微面癱;腫瘤直徑2.1~4.5 cm。

        1.2 手術(shù)方法 術(shù)前行顱腦MRI平掃及增強(qiáng)掃描,運(yùn)用DTI技術(shù)進(jìn)行面神經(jīng)成像檢查。采用西門(mén)子3.0T磁共振機(jī)采集信號(hào),參數(shù)為:脈沖序列重復(fù)時(shí)間(TR)=4 600 ms,回波時(shí)間(TE)=95 ms,矩陣=128×128,掃描視野(FOV)=230 mm×230 mm,層距=1 mm,層厚早期為4.0 mm,后期改為1.5 mm,層數(shù)早期為33層,后期改為48層,F(xiàn)A值0.1~0.5,將參數(shù)導(dǎo)入西門(mén)子 3.0T磁共振機(jī)自帶的DTI軟件,然后進(jìn)行面神經(jīng)追蹤,以內(nèi)耳門(mén)為起始點(diǎn),選擇走行于內(nèi)耳門(mén)和腦池中的纖維束,靠近腦干端需排除腦干內(nèi)的纖維束,尤其是腦橋的纖維束。患者采用丙泊酚+吸入麻醉,肌松藥物從開(kāi)始切開(kāi)硬膜即停止用藥,采用乙狀竇后入路。選擇乳突后直切口,長(zhǎng)約6 cm,骨窗大小2 cm×3 cm。暴露橫竇與乙狀竇交匯及乙狀竇后緣。以乙狀竇為中心弧形切開(kāi)硬腦膜后,釋放腦橋小腦池或延髓小腦池內(nèi)腦脊液,使腦組織充分塌陷。沿小腦半球外側(cè)達(dá)小腦腦橋角區(qū),暴露腫瘤后,電生理監(jiān)測(cè)主動(dòng)電刺激(0.1 mA)腫瘤背側(cè),查看腫瘤背側(cè)是否存在面神經(jīng),無(wú)面神經(jīng)則切開(kāi)背側(cè)行囊內(nèi)減壓,視具體磨鉆磨除內(nèi)聽(tīng)道后壁,手術(shù)過(guò)程中密切觀察動(dòng)態(tài)肌電圖,口、眼輪匝肌出現(xiàn)電活動(dòng)時(shí)及時(shí)反饋給手術(shù)醫(yī)師,注意保護(hù)面神經(jīng),直至肌電圖正常。無(wú)法辨別組織是否為面神經(jīng)時(shí),需以電刺激確認(rèn),小電流0.1 mA開(kāi)始,并逐漸增大至0.5 mA,依據(jù)面肌肌電圖勾畫(huà)出面神經(jīng)的走行方向,然后與術(shù)前DTI對(duì)比,腫瘤切除在橋小腦角池、橋前池等蛛網(wǎng)膜界面內(nèi)進(jìn)行。

        1.3 監(jiān)測(cè)方法 使用美國(guó)尼高力(Nicolet Endeavor CR16)通道監(jiān)護(hù)儀,監(jiān)測(cè)患者的面神經(jīng)自由肌電和間斷刺激器電流誘發(fā)電位。記錄電極(針型電極)分別刺入雙側(cè)眼輪匝肌和口輪匝肌,以貼膜固定電生理監(jiān)測(cè)系統(tǒng)。手術(shù)過(guò)程中對(duì)疑為神經(jīng)的組織以刺激探頭刺激,刺激量0.1~0.5 mA,結(jié)合監(jiān)測(cè)術(shù)中持續(xù)自發(fā)面神經(jīng)自由肌電圖,準(zhǔn)確向術(shù)者反饋各神經(jīng)信息。肌電圖的分析時(shí)間100 ms,靈敏度35 μV,濾波20~1 500 Hz。

        1.4 術(shù)后評(píng)估 (1)術(shù)后第1天復(fù)查MRI平掃及增強(qiáng),了解腫瘤的切除程度。(2)面神經(jīng)功能評(píng)定:對(duì)患者均進(jìn)行術(shù)后6~12個(gè)月復(fù)診時(shí)再次面神經(jīng)功能評(píng)定,按照House-Brackmann(H-B)面神經(jīng)功能分級(jí)系統(tǒng)[3]確定面神經(jīng)功能。(H-B)標(biāo)準(zhǔn):Ⅰ級(jí)為功能正常;Ⅱ級(jí)為輕度功能障礙;Ⅲ級(jí)為中度功能障礙;Ⅳ級(jí)為重度功能障礙;Ⅴ級(jí)為嚴(yán)重功能障礙;Ⅵ級(jí)為完全麻。

        2 結(jié)果

        2.1 DTI結(jié)果 11例聽(tīng)神經(jīng)瘤面神經(jīng)可通過(guò)DTI技術(shù)顯示,面神經(jīng)均位于腫瘤腹側(cè)(見(jiàn)圖1),7例位于腫瘤中部1/3,2例位于腫瘤下部1/3,2例位于腫瘤上部1/3,術(shù)前定位結(jié)果與術(shù)中所見(jiàn)吻合率為100%。

        2.2 術(shù)后情況 術(shù)后復(fù)查MRI平掃及增強(qiáng)示10例腫瘤全部切除,1例內(nèi)聽(tīng)道部分腫瘤殘余(見(jiàn)圖2)。術(shù)中面神經(jīng)動(dòng)態(tài)肌電圖監(jiān)測(cè)可提示及定位面神經(jīng),主動(dòng)刺激肌電圖監(jiān)測(cè)有助于確認(rèn)可疑組織是否為面神經(jīng)、證實(shí)面神經(jīng)完整性(見(jiàn)圖3)。11例面神經(jīng)均解剖保留,保留率為100%。術(shù)后隨訪1~12個(gè)月,面神經(jīng)功能H-B Ⅰ級(jí)4例,Ⅱ級(jí)6例,Ⅲ級(jí)1例。術(shù)后復(fù)查MRI未見(jiàn)腫瘤復(fù)發(fā)。

        注:A為橫斷位,B為冠狀位,白色箭頭指示面神經(jīng)位置
        圖1 術(shù)前聽(tīng)神經(jīng)瘤面神經(jīng)DTI
        Figure1 Ubiety between the facial nerve and acoustic neuroma detected by DTI preoperatively

        注:A為左側(cè)聽(tīng)神經(jīng)瘤MRI增強(qiáng),B為術(shù)后內(nèi)聽(tīng)道部分殘留
        圖2 術(shù)后左側(cè)聽(tīng)神經(jīng)瘤MRI
        Figure2 Results of left acoustic neuroma surgery detected by MRI postoperatively

        注:A為面神經(jīng)位于腫瘤中部1/3,B為術(shù)中面神經(jīng)電刺激肌電圖
        圖3 術(shù)中面神經(jīng)位置及面神經(jīng)電刺激肌電圖
        Figure3 Position of the facial nerve found during the surgery and manifestations of intraoperative electrical stimulation-evoked facial nerve EMG

        3 討論

        根據(jù)《聽(tīng)神經(jīng)瘤多學(xué)科協(xié)作診療中國(guó)專家共識(shí)》[4]的建議,除完全位于內(nèi)聽(tīng)道內(nèi)的小腫瘤可考慮觀察、隨訪外,突入橋小腦角區(qū)的腫瘤,除無(wú)法耐受手術(shù)建議立體定向放射外科治療,余建議行手術(shù)切除治療。隨著顯微外科技術(shù)進(jìn)步及精準(zhǔn)醫(yī)學(xué)的發(fā)展,聽(tīng)神經(jīng)瘤手術(shù)腫瘤切除死亡率已不足0.5%[1],但術(shù)后面癱成為影響患者生活質(zhì)量的最重要因素。在聽(tīng)神經(jīng)瘤中,正常的面神經(jīng)因腫瘤的擠壓、推擠后形態(tài)及位置發(fā)生改變,早期手術(shù)面神經(jīng)的辨認(rèn)和保護(hù)主要靠術(shù)中的解剖標(biāo)志、術(shù)者的經(jīng)驗(yàn)等,準(zhǔn)確率不佳,雖然目前引入神經(jīng)電生理監(jiān)測(cè),但術(shù)中監(jiān)測(cè)過(guò)程的手術(shù)操作騷擾、牽拉、擠壓面神經(jīng)仍不能避免的存在,甚至監(jiān)測(cè)過(guò)程中可能已經(jīng)發(fā)生了不可逆性面神經(jīng)損傷,TUREL等[5]報(bào)道部分手術(shù)全程均未能監(jiān)測(cè)到面神經(jīng),但術(shù)后患者面神經(jīng)仍具有一定功能,而術(shù)中可記錄到良好的面神經(jīng)肌電圖像,術(shù)后其面癱卻較重,因此術(shù)中監(jiān)測(cè)雖可提示面神經(jīng),也許在操作及分離切除腫瘤過(guò)程中面神經(jīng)受到損傷。因此術(shù)前初步判斷面神經(jīng)的位置、面神經(jīng)與腫瘤的關(guān)系,然后術(shù)中對(duì)于靠近面神經(jīng)時(shí)提醒術(shù)者對(duì)腫瘤操作輕柔、謹(jǐn)慎,減少面神經(jīng)的損傷。

        DTI技術(shù)始于20世紀(jì)90年代,最近在纖維束示蹤方面的研究逐漸增多。2007年KABASAWA等[6]已經(jīng)對(duì)健康人的三叉神經(jīng)、面神經(jīng)等顱底神經(jīng)的DTI有相關(guān)報(bào)道,受制于當(dāng)時(shí)的軟硬件水平,對(duì)腦神經(jīng)暴露尚不滿意,而隨著MRI設(shè)備的不斷進(jìn)步和相關(guān)序列的開(kāi)發(fā)和完善,宋飛等[7]對(duì)聽(tīng)神經(jīng)瘤中面神經(jīng)DTI顯影進(jìn)行研究表明,結(jié)果是可行的。GERGANOV等[8]對(duì)22例聽(tīng)神經(jīng)瘤采用DTI技術(shù)進(jìn)行術(shù)前面神經(jīng)顯影,20例術(shù)中面神經(jīng)位置與術(shù)前DTI吻合。WEI等[9]于DTI定位面神經(jīng)的同時(shí),在部分具有聽(tīng)力患者的瘤體周圍發(fā)現(xiàn)一些其他神經(jīng)纖維束,當(dāng)時(shí)考慮為耳蝸神經(jīng)可能。國(guó)內(nèi)聽(tīng)神經(jīng)瘤中術(shù)前DTI對(duì)面神經(jīng)的顯示率約為78.3%,術(shù)中對(duì)囊性聽(tīng)神經(jīng)瘤面神經(jīng)顯示率低[10]。上述文獻(xiàn)的術(shù)前面神經(jīng)定位與術(shù)中吻合率約為90%,但本組病例中,根據(jù)術(shù)中電生理監(jiān)測(cè)及切除腫瘤后面神經(jīng)的位置與術(shù)前DTI定位全部吻合,且全部面神經(jīng)解剖保留,術(shù)后隨訪面神經(jīng)功能(Ⅰ+Ⅱ級(jí)功能保留率達(dá)10/11)明顯高于既往文獻(xiàn)??紤]本組11例腫瘤,>4.5 cm的巨型腫瘤僅有1例,其余以中型腫瘤,2~3 cm為主,故術(shù)前DTI對(duì)面神經(jīng)顯示良好,術(shù)前了解面神經(jīng)與腫瘤的關(guān)系,術(shù)中切除腫瘤過(guò)程中更有的放矢,接近面神經(jīng)時(shí)腫瘤切除無(wú)論顯微操作的輕柔度與雙極電凝的功率及使用頻率術(shù)者均異常謹(jǐn)慎。而且術(shù)中電生理監(jiān)測(cè),驗(yàn)證術(shù)前的面神經(jīng)與腫瘤的關(guān)系定位。

        目前術(shù)中面神經(jīng)監(jiān)測(cè)已成為聽(tīng)神經(jīng)瘤手術(shù)的常規(guī)技術(shù)。監(jiān)測(cè)有:牽拉或操作誘發(fā)的自由肌電圖及探針間斷小電流刺激面神經(jīng)可疑區(qū)產(chǎn)生的刺激肌電圖。記錄面肌的復(fù)合動(dòng)作電位,然后通過(guò)計(jì)算機(jī)輔助,根據(jù)曲線判斷面神經(jīng)的位置及功能。動(dòng)態(tài)持續(xù)監(jiān)測(cè)神經(jīng)肌電活動(dòng),及時(shí)反饋術(shù)中的危險(xiǎn)操作。在牽拉或擠壓面神經(jīng)時(shí)可誘發(fā)出小的間斷的自發(fā)性面肌電圖,監(jiān)護(hù)儀發(fā)出警報(bào),提醒術(shù)者。雖然面神經(jīng)位于腫瘤背側(cè)的比例<1%[11],但仍然需在切開(kāi)腫瘤前先用面神經(jīng)監(jiān)測(cè)儀探測(cè),確認(rèn)無(wú)面神經(jīng)后再切開(kāi)腫瘤背側(cè)的包膜進(jìn)行腫瘤內(nèi)減壓,通常采用超聲吸引(CUSA)吸除腫瘤減壓,這樣可減少腫瘤的牽拉引起面神經(jīng)的損傷。待腫瘤體積縮小后,橋小腦角池空間增大后通過(guò)磨開(kāi)內(nèi)聽(tīng)道內(nèi)尋找面神經(jīng)或于腦干端尋找面神經(jīng),或二者相結(jié)合的方式。當(dāng)分離瘤壁牽拉面神經(jīng)時(shí),連續(xù)監(jiān)測(cè)可誘發(fā)出肌電圖,表現(xiàn)為連續(xù)收縮的波形,結(jié)合小電流(通常0.1 mA)電刺激可對(duì)面神經(jīng)的走行進(jìn)行定位。在操作時(shí)牽拉腫瘤或可疑的神經(jīng)組織時(shí)需停止操作,尤其需等面神經(jīng)警報(bào)消失后,才能進(jìn)行下一步操作。術(shù)中監(jiān)測(cè)的重點(diǎn)應(yīng)在切除內(nèi)聽(tīng)道內(nèi)或近腦干端腫瘤時(shí)。當(dāng)面神經(jīng)與腫瘤包膜在顯微鏡下難以分辨時(shí),面神經(jīng)刺激肌電圖監(jiān)測(cè)是尋找和確認(rèn)面神經(jīng)的唯一手段。腫瘤切除完畢,刺激肌電圖還可以證實(shí)面神經(jīng)結(jié)構(gòu)和功能完整與否,同時(shí)結(jié)合術(shù)前DTI面神經(jīng)與腫瘤的關(guān)系,進(jìn)行主動(dòng)電刺激,驗(yàn)證及判斷面神經(jīng)的位置,更好地保護(hù)面神經(jīng)的功能。

        通過(guò)面神經(jīng)DTI技術(shù),術(shù)前初步確定面神經(jīng)的走形、相對(duì)位置及與腫瘤的關(guān)系,有助于術(shù)中對(duì)重點(diǎn)區(qū)域更加謹(jǐn)慎的操作,在相關(guān)區(qū)域增加電生理監(jiān)測(cè),尤其是主動(dòng)電刺激驗(yàn)證及判斷面神經(jīng)的位置。當(dāng)然在特定的環(huán)境下電生理監(jiān)測(cè)可能存在不準(zhǔn)確,此時(shí)面神經(jīng)DTI技術(shù)提供面神經(jīng)的走形及位置對(duì)手術(shù)指導(dǎo)意義更大,因此,術(shù)前面神經(jīng)DTI定位、術(shù)中電生理監(jiān)測(cè)技術(shù)的聯(lián)合應(yīng)用,即全程的面神經(jīng)監(jiān)測(cè),可相互驗(yàn)證,提高面神經(jīng)解剖及功能保留率。

        本研究意義:

        目前術(shù)后面癱仍然是聽(tīng)神經(jīng)瘤外科手術(shù)的難點(diǎn)與困惑,在聽(tīng)神經(jīng)瘤中,正常的面神經(jīng)因腫瘤的擠壓、推擠導(dǎo)致神經(jīng)位置的改變,既往主要靠術(shù)中的解剖、術(shù)者的經(jīng)驗(yàn)等進(jìn)行辨認(rèn)和保護(hù),主觀性強(qiáng)。本研究通過(guò)面神經(jīng)磁共振彌散張量成像(DTI)在術(shù)前初步確定面神經(jīng)的走形、相對(duì)位置及與腫瘤的關(guān)系,術(shù)中通過(guò)電生理監(jiān)測(cè)驗(yàn)證及判斷面神經(jīng)的位置,相輔相成,保護(hù)面神經(jīng)。但本研究病例數(shù)少,且為單一回顧性總結(jié)研究,未進(jìn)行對(duì)照研究,因此后期仍需隨機(jī)對(duì)照研究。

        作者貢獻(xiàn):宋海民進(jìn)行文章的構(gòu)思與設(shè)計(jì)、研究的實(shí)施與可行性分析、數(shù)據(jù)整理、統(tǒng)計(jì)學(xué)處理、撰寫(xiě)論文、論文的修訂;宋海民、吳至武、馮開(kāi)明、羅德芳進(jìn)行數(shù)據(jù)收集;宋海民、蔣秋華進(jìn)行結(jié)果的分析與解釋、負(fù)責(zé)文章的質(zhì)量控制及審校、對(duì)文章整體負(fù)責(zé),監(jiān)督管理。

        本文無(wú)利益沖突。

        [1]GURGEL R K,THEODOSOPOULOS P V,JACKLER R K.Subtotal/near-total treatment of vestibular schwannomas[J].Curr Opin Otolaryngol Head Neck Surg,2012,20(5):380-384.DOI:10.1097/MOO.0b013e328357b220.

        [2]JAIN Y,FALCIONI M,AGARWAL M,et al.Total facial paralysis after vestibular schwannoma surgery:probability of regaining normal function[J].Ann Otol Rhinol Laryngol,2004,113(9):706-710.DOI:10.1177/000348940411300906.

        [3]KANZAKI J,TOS M,SANNA M,et al.New and modified reporting systems from the consensus meeting on systems for reporting results in vestibular schwannoma[J].Otol Neurotol,2003,24(4):642-649.DOI:10.1097/00129392-200307000-00019.

        [4]中國(guó)顱底外科多學(xué)科協(xié)作組.聽(tīng)神經(jīng)瘤多學(xué)科協(xié)作診療中國(guó)專家共識(shí)[J].中華醫(yī)學(xué)雜志,2016,96(9):676-680.DOI:10.3760/cma.j.issn.0376-2491.2016.09.002.

        Chinese Skull Base Surgery Multidisciplinary Collaborative Group.Acoustic neuroma multidisciplinary collaborative diagnosis and treatment Chinese experts consensus[J].National Medical Journal of China,2016,96(9):676-680.DOI:10.3760/cma.j.issn.0376-2491.2016.09.002.

        [5]TUREL M K,BABU K S,SINGH G,et al.The utility of facial nerve amplitude and latency ratios in predicting postoperative facial nerve function after vestibular schwannoma surgery[J].Neurol India,2014,62(2):178-182.DOI:10.4103/0028-3886.132373.

        [6]KABASAWA H,MASUTANI Y,AOKI S,et al.3T PROPELLER diffusion tensor fiber tractography:a feasibility study for cranial nerve fiber tracking[J].Radiat Med,2007,25(9):462-466.DOI:10.4103/0028-3886.132373.

        [7]宋飛,侯遠(yuǎn)征,許百男,等.彌散張量成像的纖維束追蹤重建面神經(jīng)可行性研究[J].中華耳科學(xué)雜志,2013,11(1):37-41.DOI:10.3969/j.issn.1672-2922.2013.01.009.

        SONG F,HOU Y Z,XU B N,et al.Feasibility of facial nerve 3-D reconstruction through diffusion tensor imaging-based fiber tracking[J].Chinese Journal of Otology,2013,11(1):37-41.DOI:10.3969/j.issn.1672-2922.2013.01.009.

        [8]GERGANOV V M,GIORDANO M,SAMII M,et al.Diffusion tensor imaging-based fiber tracking for prediction of the position of the facial nerve in relation to large vestibular schwannomas[J].J Neurosurg,2011,115(6):1087-1093.DOI:10.3171/2011.7.JNS11495.

        [9]WEI P H,QI Z G,CHEN G,et al.Identification of cranial nerves near large vestibular schwannomas using superselective diffusion tensor tractography:experience with 23 cases[J].Acta Neurochir(Wien),2015,157(7):1239-1249.DOI:10.1007/s00701-015-2431-7.

        [10]劉宏毅,張玉海,鄒元杰,等.彌散張量面神經(jīng)成像技術(shù)在大型聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)定位的可行性研究[J].臨床神經(jīng)外科雜志,2015,12(1):36-39.DOI:10.3969/j.issn.1672-7770.2015.01.010.

        LIU H Y,ZHANG Y H,ZOU Y J,et al.Feasibility of preoperative facial nerve visualization and localization by diffusion tensor imaging in large vestibular schwannoma surgery[J].Journal of Clinical Neurosurgery,2015,12(1):36-39.DOI:10.3969/j.issn.1672-7770.2015.01.010.

        [11]SAMPATH P,RINI D,LONG D M.Microanatomical variations in the cerebellopontine angle associated with vestibular schwannomas(acoustic neuromas):a retrospective study of 1006 consecutive cases[J].J Neurosurg,2000,92(1):70-78.DOI:10.3171/jns.2000.92.1.0070.

        FacialNerveMonitoringfortheProtectionofFacialNerveduringtheAcousticNeuromaSurgery

        SONGHai-min,WUZhi-wu,FENGKai-ming,LUODe-fang,JIANGQiu-hua*

        DepartmentofNeurosurgery,GanzhouHospitalAffiliatedtoNanchangUniversity,GanzhouPeople′sHospital,Ganzhou314000,China

        *Correspondingauthor:JIANGQiu-hua,Chiefphysician,Mastersupervisor;E-mail:276309587@qq.com

        ObjectiveTo investigate the effect of facial nerve monitoring by preoperative facial nerve imaging(FNI) via diffusion tensor imaging(DTI),combined with intraoperative electrophysiologic facial nerve monitoring for the protection of facial nerve during the acoustic neuroma surgery.MethodsThe enrolled participants were 11 consecutive cases of acoustic neuroma who

        treatment in Ganzhou Hospital Affiliated to Nanchang University from January 2016 to January 2017.All of them underwent DTI for examining the ubiety between the facial nerve and acoustic neuroma preoperatively,and facial nerve dynamic electromyography(ECG) and electrical stimulation-evoked facial nerve EMG intraoperatively.The position of the facial nerve detected by DTI was tested during the surgery.And the function of the facial nerve was assessed postoperatively.ResultsBy using DTI,it was found that,the facial nerve of all the cases was at the ventral side of the acoustic neuroma,specifically,it was at the middle part of the acoustic neuroma in 7 cases,at the lower part in 2 cases and at the upper part in 2 cases,all these were the same as those found in the surgery.Ten cases achieved total resection,but 1 case had internal auditory canal tumor residues.Intraoperative facial nerve dynamic EMG monitoring indicated the facial nerve and it′s position.The facial nerve of all the patients were anatomically preserved in the surgery with a preservation rate of 100%.The results of 1-12-month follow-up showed that,there were 4 cases of House-Brackmann grade Ⅰ,6 cases of grade Ⅱ and 1 case of grade Ⅲ.ConclusionPreoperative FNI via DTI combined with intraoperative electrophysiologic facial nerve monitoring are helpful to locate and protect the facial nerve during surgery,and improve the anatomical and functional preservation rates of the facial nerve in acoustic neuroma surgery.

        Neuroma,acoustic;Facial nerve;Diffusion magnetic resonance imaging;Electrophysiologic monitoring

        R 739.43

        A

        10.3969/j.issn.1007-9572.2017.07.y21

        2017-05-04;

        2017-06-15)

        (本文編輯:賈萌萌)

        江西省科技廳重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(20161BBG70025)

        314000江西省贛州市,南昌大學(xué)附屬贛州醫(yī)院 贛州市人民醫(yī)院神經(jīng)外科

        *通信作者:蔣秋華,主任醫(yī)師,碩士生導(dǎo)師;E-mail:276309587@qq.com

        宋海民,吳至武,馮開(kāi)明,等.全程面神經(jīng)監(jiān)測(cè)在聽(tīng)神經(jīng)瘤術(shù)中面神經(jīng)保護(hù)的應(yīng)用研究[J].中國(guó)全科醫(yī)學(xué),2017,20(29):3699-3702.[www.chinagp.net]

        SONG H M,WU Z W,FENG K M,et al.Facial nerve monitoring for the protection of facial nerve during the acoustic neuroma surgery[J].Chinese Genera Practice,2017,20(29):3699-3702.

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