医学文献翻译中英对照.docx
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医学文献翻译中英对照
Currentusageofthree-dimensionalputedtomographyangiographyforthediagnosisandtreatmentofrupturedcerebralaneurysms
KenichiAmagasakiMD,NobuyasuTakeuchiMD,TakashiSatoMD,ToshiyukiKakizawaMD,TsuneoShimizuMDKantoNeurosurgicalHospital,Kumagaya,Saitama,Japan
SummaryOurpreviousstudysuggestedthat3D-CTangiographycouldreplacedigitalsubtraction(DS)angiographyinmostcasesofrupturedcerebralaneurysms,especiallyintheanteriorcirculation.Thisstudyreviewedourfurtherexperience.OnehundredandfiftypatientswithrupturedcerebralaneurysmsweretreatedbetweenNovember1998andMarch2002.Only3D-CTangiographywasusedforthepreoperativework-upstudyinpatientswithanteriorcirculationaneurysms,unlesstheattendingneurosurgeonsagreedthatDSangiographywasrequired.
Both3D-CTangiographyandDSangiographywereperformedinpatientswithposteriorcirculationaneurysms,exceptforrecentcasesthatwerepossiblytreatedwith3D-CTangiographyalone.Onehundredsixteen(84%)of138patientswithrupturedanteriorcirculationaneurysmsunderwentsurgicaltreatment,butadditionalDSangiographywasrequiredin22cases(16%).Onlytworecentpatientsweretreatedsurgicallywith3D-CTangiographyalonein12patientswithposteriorcirculationaneurysms.Mostpatientswithrupturedanteriorcirculationaneurysmscouldbetreatedsuccessfullyafter3D-CTangiographyalone.However,additionalDSangiographyisstillnecessaryinatypicalcases.3D-CTangiographymaybelimitedtoplementaryuseinpatientswithrupturedposteriorcirculationaneurysms.
a2003ElsevierLtd.Allrightsreserved.
Keywords:
3D-CTangiography,cerebralaneurysm,subarachnoidhaemorrhage,surgery
INTRODUCTION
Recently,three-dimensionalputedtomography(3D-CT)angiographyhasbeeoneofthemajortoolsfortheidentificationofcerebralaneurysmsbecauseitisfaster,lessinvasive,andmoreconvenientthancerebralangiography.1–7Patientswithrupturedaneurysmscouldbetreatedunderdiagnosesbasedononly3D-CTangiography.5;63D-CTangiographyhassomelimitationsforthepreoperativework-upforrupturedcerebralaneurysms,soadditionaldigitalsubtraction(DS)angiographyisstillnecessary,especiallyforaneurysmsintheposteriorcirculation.8Ourpreviousstudysuggestedthat3D-CTangiographycouldreplaceDSangiographyinmostpatientswithrupturedcerebralaneurysmsintheanteriorcirculation.1Thisstudyreviewedourexperienceoftreatingrupturedcerebralaneurysmsintheanteriorandposteriorcirculationsbasedon3D-CTangiographyin150consecutivepatientstoassessthecurrentusageof3D-CTangiography.
METHODSANDMATERIAL
Patientpopulation
Wetreated150patients,60menand90womenagedfrom23to80years(mean57.5years),withrupturedcerebralaneurysmidentifiedby3D-CTangiographybetweenNovember1998andMarch2002.
Managementofcases
Thepresenceofnontraumaticsubarachnoidhaemorrhage(SAH)wasconfirmedbyCTorlumbarpuncturefindingsofxanthochromiccerebrospinalfluid.3D-CTangiographywasperformedroutinelyinallpatients.DSangiographywasperformedinpatientswithanteriorcirculationaneurysmsonlyifadditionalinformationwasconsiderednecessaryfollowingaconsensusinterpretationoftheinitialCTand3D-CTangiographybyfourneurosurgeons.Patientswithrupturedaneurysmsintheposteriorcirculationunderwentboth3D-CTangiographyandDSangiographyexceptfortworecentpatientswithtypicalvertebralarteryposteriorinferiorcerebellarartery(VA-PICA)aneurysm.
Typicalsaccularaneurysmsweretreatedbyclippingsurgery.
Fusiformanddissectinganeurysmsweretreatedbyproximalocclusionbyeithersurgeryorendovasculartreatmentwithorwithoutbypasssurgery.Regrowthofbleedinganeurysmswastreatedbyeithersurgeryorendovasculartreatment.Postoperatively,allpatientsweremanagedwithaggressivepreventionandtreatmentofvasospasmincludingintra-arterialinfusionofpapaverineortransluminalangioplasty.
3D-CTangiographyacquisitionandpostprocessingCTangiographywasperformedwithaspiralCTscanner(CT-W3000AD;Hitachi,Ibaraki,Japan).Acquisitionusedastandardtechniquestartingattheforamenmagnum,withinjectionof130mlofnonioniccontrastmaterial(Omnipaque;DaiichiPharmaceutical,Tokyo,Japan).Thesourceimagesofeachscanweretransferredtoanoff-lineputerworkstation(VIPstation;TeijinSystemTechnology,Japan).Bothvolume-renderedimagesandmaximumintensityprojectionimagesofthecerebralarterieswereconstructed.Theanteriorcirculationandposteriorcirculationwereevaluatedseparatelyonthevolume-renderedimages,afterageneralsuperiorviewwasobtained.Theanteriorcirculationwasevaluatedbyfirstobservingtheanteriormunicatingartery(ACoA)byrotatingtheview,andtheneachsideofthecarotidsystembyrotatingtheimagewitheditingoutofthecontralateralcarotidartery.Theposteriorcirculationwasalsoevaluatedbyrotatingtheimagebutwithouteditingoutofanyvessel.Onceapossiblerupturesitewasfound,theviewwaszoomedandcloselyrotatedwiththeothervesselseditedout.Theaneurysmsizewasmeasuredon3D-CTangiographyasthelargerofthelengthofthedomeorthewidthoftheneck.Manipulationwasperformedbythescannertechnician,withaneurosurgeontoprovideeditingassistance.
DSangiographyacquisition
Standardselectivethree-orfour-vesselDSangiogramswithfrontal,lateral,andobliqueprojectionswereobtained.The3D-CTangiogramwasalwaysavailableasaguideforpossibleadditionalDSangiographyprojections.AneurysmsizewasmeasuredwithDSangiographywhenthequalityof3D-CTangiographywasinadequate.AllpatientsexceptelderlypatientsorpatientsinsevereconditionunderwentDSangiographypostoperatively.
Gradingofpatients
TheclinicalconditionsofthepatientsatadmissionwereclassifiedaccordingtotheHuntandKosnikgrade.9Clinicaloutewasdeterminedat3monthsaccordingtotheGlasgowOute
Scale.10
RESULTS
TheaneurysmlocationsandsizesareshowninTable1.Onehundredsixteen(84%)of138casesofaneurysmsintheanteriorcirculationweretreatedafteronly3D-CTangiography,and22cases(16%)requiredadditionalDSangiography.Tenof12casesofaneurysmsintheposteriorcirculationrequiredboth3D-CTangiographyandDSangiography,buttworecentcasesoftypicalVA-PICAaneurysmwereclippedafteronly3D-CTangiography(Fig.1).Thefirst10ofthe22casesintheanteriorcirculation,whichrequiredadditionalDSangiographyweredescribedpreviously,1sothemostrecent12patientsarelistedinTable2.Theserecentcasesincludedsomeatypicalaneurysms.Cases6and8hadafusiformaneurysmoftheinternalcarotidartery(ICA).AdditionalDSangiographywasperformedtoobtainhaemodynamicinformation.ICAtrappingwithsuperficialtemporalartery-middlecerebralarteryanastomosiswasperformedinCase6becausetheatheroscleroticarteriesfailedtodemonstratetheballoonocclusiontest(Fig.2).ICAocclusionbyendovasculartreatmentwasperformedinCase8becausethepatientcouldtoleratetheballoonocclusiontest.Cases4,9,and10sufferedregrowthofbleedinganeurysmsafterclippingsurgery.Clipartifactspreventedevaluationoftherupturedsiteaswellasidentificationofdenovoaneurysmsinthesecases(Fig.3).SurgicalclippingwasperformedinCases4and10andendovasculartreatmentinCase9.Case11hadanACoAaneurysmassociatedwithanarteriovenousmalformation(AVM)(Fig.4).DSangiographywasperformedtoevaluatetheAVM.Case12hadalargeICA-posteriormunicatingartery(PCoA)aneurysm,andadditionalDSangiographywasperformedbecausethePCoAcouldnotbedetectedby3D-CTangiography(Fig.5).Cases1,2,3,5,and7presentedwithsmallaneurysms,andDSangiographywasperformedtoexcludeotherlesionsaswellastoobtaininformationabouttheproximalICAforpatientswithsupraclinoidtypeaneurysms.
Table1Distributionandsizeofcerebralaneurysmsin150consecutivepatients
SiteNo.ofpatients
Anteriorcirculation138
ICA(supraclinoid)3
ICAbifurcation1
ICA-OphA3
ICA-PCoA39
(1)
ICAfusiform2
ACoA50
DistalACA4
MCA36
(1)
Posteriorcirculation12
PCA1
BAtip3
BA-SCA1
BAtrunk1
(1)
VA-PICA3
VAdissecting3
(1)
Size(mm)
<542
P5to<1299
P129
Numberinparenthesesindicatespatientswhounderwentendovasculartreatment.
OphA,ophthalmicartery;ACA,anteriorcerebralartery;MCA,middlecerebralartery;PCA,posteriorcerebralartery;BA,basilarartery;SCA,superiorcerebellarartery.
Table2Twelvepatientswithrupturedanteriorcirculationaneurysmswho
underwentadditionalDSangiography
CaseNo.LocationSize(mm)
1lt.ICA-PCoA3.1
2ACoA2.2
3lt.ICAsupraclinoid1.6
4lt.ICA-PCoA7.8
5lt.ICAsupraclinoid2.4
6lt.ICA(fusiform)11.8
7lt.ICA-PCoA3.2
8rt.ICA(fusiform)18.8
9lt.MCA9.6
10lt.ICA-PCoA10.5
11ACoA10.1
12lt.ICA-PCoA18.2
Thesurgicalfindingscorrelatedwellwiththe3D-CTangiographyorDSangiography.Table3showstheconditiononadmissionandouteat3monthsaftersurgery.Somepatientswithgoodgradesonadmissiondiedofseverespasm,acutebrainswelling,orpoorgeneralcondition,buttheseouteswerenotrelatedtothepreoperativeradiologicalinformation.
DISCUSSION
ThepresentstudyofrupturedaneurysmsinbothanteriorandposteriorcirculationsfoundthattheindicationsforadditionalDSangiographyintheanteriorcirculationaresimilartothatfoundpreviously,butweexperiencedsomenewatypicalcases.Treatmentoffusiformaneurysmsdependsonthehaemodynamicinformation,whichcouldonlybeobtainedbyDSangiography.ACoAaneurysmassociatedwithAVM,althoughtheinitialCTindicatedthattheaneurysmhadbled,requiredaccurate