資源描述:
《三維cta的研究椎動(dòng)脈橫突段的走行與解剖變異》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、AbstractffIllllrlflllIlllllllllJIllllllllIIIl:flrrllllrlllY2043229objective:Toevaluatethethree-dimensionalCTangiography(3DCTA)indisplayingtheV2segmentofthevertebralartery,andidenfifytheCOUrSeandvariation.Methods:250c弱麟withoutobviouspathologicallesionswereselectedfromthe3Dda
2、taofhead-neck∞Aexamination.Onthe3Dimages,Weobservedthecol璐舔oftheV2segmentofthevertebralarteryandthevariationsofthevasculardiameter.Measuringthedistancebetweenbothsidesvertebralartery.ResuRs:ThevertebralarteryenteredtheC6transverseforamenin92.6%ofallspecimens.Anabnormallevel
3、oferlffantcewasobservedin7.4%ofspecimens(37courses),withalevelofentranceintotheC4,C5,orC7transverseforamen,respectively,in2.2%(n=11;29.7%ofallanomalies),4.6%(n=23;62.2%ofallanomalies)and0.6%(n=3;8.1%ofallanomalies)ofallspecimens.20(54.1%)abnormalitieswereright-sidedand17(45
4、.9%)WerCleft-sided.21outof250patients(10.8%)hadaunilateralanomalyand5hadabilateralanomaly(2%).Tocomparethevasculardiameterofthevertebralartery,thesizeintheleftwerelargerthanthatintherightin53CaSCS,andthesizeintherightwerelargerthanintheleftin30cases,whichWasofsignificantdif
5、ferencebe撕eenleftandright(p<0.01).Thedistanceofthevertebralarteryincreasegraduallyfromtoptobottom.Conclusion:TheincidenceofanatomicvariationsofthevertebralarteryV2segmentislligh.3D—CTA,whichCanobjectivelyreflectthepathologyofthevertebralartery,hasimportantclinicalvalue.KEYW
6、ORDS:vertebralartery;anatomicvariations;cervicalspine;three-dimensionalCTangiography(3DCTA)引言椎動(dòng)脈(vertebralartery,VA)是腦部血液供應(yīng)的重要組成部分,椎動(dòng)脈在其走行過(guò)程中有較高的解剖變異的發(fā)生率,隨著頸椎手術(shù)的廣泛開(kāi)展,椎動(dòng)脈的醫(yī)源性損傷越來(lái)越受到各國(guó)學(xué)者的關(guān)注【1。2】。椎動(dòng)脈有多種影像學(xué)檢查方法,近年來(lái),隨著三維CT技術(shù)的不斷發(fā)展,三維CT血管造影(3D.CTA)在椎動(dòng)脈顯像中顯示其獨(dú)特的優(yōu)勢(shì),3D.CTA能從不同角度觀察椎動(dòng)脈
7、的形態(tài),立體感強(qiáng)、與周圍結(jié)構(gòu)分界清楚,一次成像后可從不同角度重建、反復(fù)觀察,能滿足臨床及實(shí)驗(yàn)研究中對(duì)椎動(dòng)脈成像的要求,已在臨床工作中得到廣泛的應(yīng)用。椎動(dòng)脈在橫突孔段的經(jīng)典走形是位于C6.C2橫突孔間【3捌,頸椎橫突段是頸椎手術(shù)的常見(jiàn)手術(shù)操作區(qū)域,忽略本段的解剖變異可能導(dǎo)致意外損傷及潛在的嚴(yán)重并發(fā)型5?!啊?。椎動(dòng)脈在橫突孔段的解剖變異率發(fā)生較高,常見(jiàn)的是椎動(dòng)脈進(jìn)入橫突孔水平的變異、血管管徑的變異等,椎動(dòng)脈由異常高的橫突孔水平進(jìn)入意味著椎動(dòng)脈缺少下一級(jí)橫突的保護(hù)。此時(shí),椎動(dòng)脈可曲折內(nèi)側(cè)或移向外側(cè),這樣在進(jìn)行椎體切除或處理椎間孔時(shí)有可能損傷異常走行
8、的椎動(dòng)脈。而椎動(dòng)脈左右側(cè)血管管徑的變異,意味著一旦損傷優(yōu)勢(shì)動(dòng)脈可導(dǎo)致嚴(yán)重的潛在并發(fā)癥。椎動(dòng)脈在頸椎兩側(cè)的距離由上到下是逐漸增加的,意味著在臨床手術(shù)中向兩側(cè)分離時(shí),上