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ID:32243430
大小:2.54 MB
页数:27页
时间:2019-02-02
《三维cta的的研究椎动脉横突段的走行与解剖变异》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AbstractffIllllrlflllIlllllllllJIllllllllIIIl:flrrllllrlllY2043229objective:Toevaluatethethree-dimensionalCTangiography(3DCTA)indisplayingtheV2segmentofthevertebralartery,andidenfifytheCOUrSeandvariation.Methods:250c弱麟withoutobviouspathologicallesionsweresele
2、ctedfromthe3Ddataofhead-neck∞Aexamination.Onthe3Dimages,Weobservedthecol璐舔oftheV2segmentofthevertebralarteryandthevariationsofthevasculardiameter.Measuringthedistancebetweenbothsidesvertebralartery.ResuRs:ThevertebralarteryenteredtheC6transverseforamenin92.6%
3、ofallspecimens.Anabnormalleveloferlffantcewasobservedin7.4%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.
4、20(54.1%)abnormalitieswereright-sidedand17(45.9%)WerCleft-sided.21outof250patients(10.8%)hadaunilateralanomalyand5hadabilateralanomaly(2%).Tocomparethevasculardiameterofthevertebralartery,thesizeintheleftwerelargerthanthatintherightin53CaSCS,andthesizeintheri
5、ghtwerelargerthanintheleftin30cases,whichWasofsignificantdifferencebe撕eenleftandright(p<0.01).Thedistanceofthevertebralarteryincreasegraduallyfromtoptobottom.Conclusion:TheincidenceofanatomicvariationsofthevertebralarteryV2segmentislligh.3D—CTA,whichCanobject
6、ivelyreflectthepathologyofthevertebralartery,hasimportantclinicalvalue.KEYWORDS:vertebralartery;anatomicvariations;cervicalspine;three-dimensionalCTangiography(3DCTA)引言椎动脉(vertebralartery,VA)是脑部血液供应的重要组成部分,椎动脉在其走行过程中有较高的解剖变异的发生率,随着颈椎手术的广泛开展,椎动脉的医源性损伤越来越受到各国学者
7、的关注【1。2】。椎动脉有多种影像学检查方法,近年来,随着三维CT技术的不断发展,三维CT血管造影(3D.CTA)在椎动脉显像中显示其独特的优势,3D.CTA能从不同角度观察椎动脉的形态,立体感强、与周围结构分界清楚,一次成像后可从不同角度重建、反复观察,能满足临床及实验研究中对椎动脉成像的要求,已在临床工作中得到广泛的应用。椎动脉在横突孔段的经典走形是位于C6.C2横突孔间【3捌,颈椎横突段是颈椎手术的常见手术操作区域,忽略本段的解剖变异可能导致意外损伤及潜在的严重并发型5。“】。椎动脉在横突孔段的解剖变异率发
8、生较高,常见的是椎动脉进入横突孔水平的变异、血管管径的变异等,椎动脉由异常高的横突孔水平进入意味着椎动脉缺少下一级横突的保护。此时,椎动脉可曲折内侧或移向外侧,这样在进行椎体切除或处理椎间孔时有可能损伤异常走行的椎动脉。而椎动脉左右侧血管管径的变异,意味着一旦损伤优势动脉可导致严重的潜在并发症。椎动脉在颈椎两侧的距离由上到下是逐渐增加的,意味着在临床手术中向两侧分离时,上
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