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1、颅内动脉瘤形态学特征及破裂风险CTA评估李剑秋,陈莉,姚开情,勒都晓兰,吕发金(400016重庆,重庆医科大学附属第一医院放射科)[摘要]目的研究颅内动脉瘤的形态学特征与破裂风险的关系,初步预测动脉瘤的破裂风险。方法回顾性分析154例194个颅内动脉瘤资料,其中破裂组61例(82个动脉瘤)和未破裂组93例(112个动脉瘤),测量瘤体长度、瘤颈宽度,计算瘤体长度与瘤颈宽度的比值(AR值),观察有无子囊、子囊个数及位置,分析以上指标与破裂的相关性。结果破裂组平均瘤体长度(4.95±4.80)mm,瘤颈宽度(3.55±3.10)mm,AR值(1.21±0.68),47.
2、6%有子囊;未破裂组平均瘤体长度(2.75±2.65)mm,瘤颈宽度(2.85±1.90)mm,AR值(0.96±0.55),14.3%有子囊。两组间有无子囊的比较差异有统计学意义(P<0.05)。颅内动脉瘤破裂的临界瘤体长度、瘤颈宽度和AR值分别为3.65、3.35mm和1.135;瘤颈宽度<3.35mm时的破裂风险是>3.35mm时的2.05倍,瘤体长度>3.65mm时的破裂风险是<3.65mm时的3.76倍,AR值>1.135时的破裂风险是<1.135时的3.18倍,有子囊的破裂风险是无子囊的5.64倍。结论颅内动脉瘤的瘤体长度、瘤颈宽度、AR值和子囊形成是
3、动脉瘤破裂的危险因素,瘤体越长、瘤颈越小、AR值越大或有子囊形成,动脉瘤破裂风险越大。[关键词]颅内动脉瘤;形态学特征;瘤体长度;瘤颈宽度;AR值;子囊[中图法分类号]R764.93;R732.2[文献标志码]AMorphologicalfeaturesofintracranialaneurysmanditsruptureriskassessmentLiJianqiu,ChenLi,YaoKaiqing,LeduXiaolan,LuFajin(DepartmentofRadiology,FirstAffiliatedHospital,ChongqingMedica
4、lUniversity,Chongqing,400016,China)[Abstract]ObjectiveTodeterminetherelationshipbetweenthemorphologicalfeaturesandruptureriskofintracerebralaneurysm.MethodsAnretrospectiveanalysiswascarriedoutontheclinicaldataof194intracranialaneurysmsin154patients(61with82rupturedaneurysmsand93with11
5、2ruptured)whodiagnosedinourhospitalformDeember2009toJune2011.Theirthree-dimensionalgeometrieswereevaluatedforarangeofmorphologicalparameters.Theparametersincludeddepth,neckwidth,aspectratio(AR),withdaughtersacornot,andnumberandpositionofdaughtersac.ResultsThemeandepth,neckwidthandARwe
6、re4.95±4.80mm,3.55±3.10mm,1.21±0.68respecivelyforthepatientswithrupturedaneurysms,and2.75±2.65mm,2.85±1.90mm,and0.96±0.55respectivelyforthosewithunrupturedaneurysms.Significantdifferencewasfoundintheaneurysmswithdaughtersacornotbetweentherupturedandunrupturedgroups(P<0.05).Thecritical
7、valuesofdepth,neckwidthandARinintracranialaneurysmsforruptureriskwere3.65mm,3.35mmand1.135respectively.Theaneurysmswithdepthover3.65mmhadtheriskofruptureby3.76timeshigherthanthosewithlesserdepth.Theaneurysmswithneckwidthlessthan3.35hadtheriskby3.18timeshigherthanthosewithwidthlarger.W
8、henAR