简介:目的利用Micro-CT扫描数据建立中耳听骨链三维有限元模型。方法用Micro—CT扫描成人颞骨标本,将获得的图像数据通过MicroView、Mimics等软件进行三维重建。再将模型转入其有限元分析(finiteelementanalysis,FEA)模块的Remesh环境中进行调整、细化及面网格优化,通过SOLIDEWORK软件转换为实体网格。结果初步形成的三维几何模型可较清晰地辨别鼓室腔、听小骨和内耳系统,但部分图像不同程度存在噪点。最终形成了FEA软件可识别的成人中耳听骨链三维有限元网格模型,网格划分后的听骨链有限元模型中,完整听骨链的节点数降低,由原来包括805个不合理节点在内的12498个节点降低到2050个,在此基础上建立的有限元模型共1350个8节点四面体单元。结论结合Micro—CT技术及Mimics软件的三维建模方法可以快速获得较精确的听骨链三维数据,是建立听骨链三维有限元模型的有效途径。(中国眼耳鼻喉科杂志,2009.9.83。85)
简介:Endogenousaspergillusendophthalmitis(EAE)afterkidneytransplantisararebutimportantclinicalproblemduetopotentiallydevastatingconsequences.EarlydiagnosisofEAE,timelyremovalofaffectedvitreousbyvitrectomy,properanti-fungaltreatment,allcontributedtothesuccessfulcontrolofthedisease.TherapeuticsuccessofEAEinpost-transplantpatientsdependslargelyonpromptdiagnosis.DefinitediagnosisofEAEisbasedonpositivecultureresultsofvitreousspecimen,whilefundoscopyandBscanultrasoundmayaidearlydiagnosis.Intermsofanti-fungalmedicine,amphotericinBhaslongbeenthefirstchoice,butitssystemicapplicaitonhassevereadversereactions,especiallyforpatientswithimpairedrenalfunction.Herein,wereportthetreatmentmodalityofEAEafterkidneytransplantwithvitrectomy,systemicadministrationofmicafunginplusvoriconazole,topicalapplicationoffluconazolandamphotercinB.
简介:目的:探讨中老年人膳食碳水化合物及脂肪摄入量与年龄相关白内障(age-relatedcataract,ARC)危险性之间的关系。方法:采用以医院为基础的病例对照研究方法。病例由45~85岁的360例白内障患者组成,对照由同期入住相同医院的360例非白内障的患者组成,采取1∶1匹配。采用自行设计的调查表对研究对象进行调查,内容包括人口学特征、生活方式、以及既往史等,同时还采用一份有效的半定量化食物频率调查表(FFQ),获取研究对象膳食营养素的摄入情况。应用多因素Logistic回归分析估计碳水化合物及脂肪摄入量与ARC关联的比值比(OR)及其相应的95%可信区间(CI)。结果:调整多种潜在性混杂因素后,碳水化合物摄入量增加可使发生ARC的危险性升高,与摄入量为最低四分位数的对照相比较,摄入量为最高四分位数的病例发生ARC的OR为2.161(95%CI:1.107~5.016,P〈0.001)。同样,多不饱和脂肪酸摄入量也与ARC呈正相关,摄入量为最高四分位数的病例发生ARC危险性是最低四分位数对照的3倍(OR=2.989,95%CI:1.764~5.062,P〈0.001)。总脂肪摄入量与ARC无关(P=0.778)。结论:膳食碳水化合物及多不饱和脂肪酸摄入量增加可使发生ARC的危险性升高,合理营养、平衡膳食可能有助于预防ARC。
简介:目的:建立链脲佐菌素(streptozotocin,STZ)诱导的小鼠增殖性糖尿病视网膜病(proliferativediabeticretinopathy,PDR)动物模型,并观察在增殖性糖尿病视网膜病发生、发展过程中血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)及其受体(VEGFR1,VEGFR2),金属基质蛋白酶(matrixmetalloproteinase,MMP)2,MMP9表达的变化。方法:C57BL/6J小鼠连续5d腹腔注射STZ(55mg/kg)。末次注射后7d检测血糖浓度。糖尿病诱导成功的小鼠和正常小鼠继续饲养3~5mo。实验结束后进行视网膜病理组织观察,并利用CD31免疫荧光染色检测视网膜血管的分布情况。采用实时定量荧光PCR分析检测VEGF,VEGFR1,VEGFR2,MMP2,MMP9的基因表达。结果:视网膜组织病理观察和CD31免疫荧光染色实验结果均表明5月龄的糖尿病小鼠视网膜组织中血管数目明显比同月龄正常小鼠多。同时,与同月龄正常小鼠相比,5月龄糖尿病小鼠视网膜组织中VEGF,VEGFR1,VEGFR2,MMP2,MMP9的基因表达也明显增加。结论:本研究表明STZ诱导的糖尿病小鼠在5月龄时发生了增殖性糖尿病视网膜病的病变,期间视网膜组织中VEGF,VEGFR1,VEGFR2,MMP2,MMP9的基因表达都明显增加。
简介:AIM:Tocharacterizetheclinicalfeatures,diagnosis,treatmentandprognosisofuveitisassociatedwithankylosingspondylitis(AS)inChinesepatients.·METHODS:TwohundredandthreepatientswithuveitisassociatedwithASfollowed-upintheThirdMilitaryMedicalUniversityDapingHospitalbetween2005and2010wereretrospectivelyevaluatedinthisstudy.Completeophthalmologicalexaminationswereevaluatedatbaselineandduringthefollow-upperiod.Thegender,age,follow-uptime,meanfrequencyofuveitisonset,andaccompanyingeyeexaminationfindings,history,demographicalparameterswerereviewed.Allthepatientspresentedcompleteclinicalandradiologic(sacroiliac,lumbar,dorsalandcervicalspine,knee,ankle,shoulder,hip,elbow)evaluation.HLA-B27typingwasalsosearched.·RESULTS:Therewere203patientsdiagnosedwithASassociateduveitis.AllshowedsacroiliacX-raychangesindicativeofAS.Therewere184maleand19femalepatients.Theaverageageofpatientswas35±12(range18-50).Meanfollow-upperiodwas2.4years(1-5years).Acuteanterioruveitiswasthemostcommontypeofuveitisinbothgenders.121eyespresentedunilateralinvolvement(55.2%),and92eyespresentedbilateralinvolvement(45.3%)withonsetalternately.22eyesoccurredhypopyon,16eyeswerefoundanteriorvitreouscells,7eyeswerenotedreactivemacularedemaorexudation,29eyespresentedposteriorsynechiaeofiris,and14eyespresentedcataract,9eyespresentedsecondaryglaucoma,2eyespresentedbendcornealdegenerationand1eyespresentedatrophyofeyeball.Atthefinalvisit,uveitiswaswellcontrolledinmostpatients.·CONCLUSION:ASassociatedwithuveitisinChinesepatientsmainlymanifestsasacuteanterioruveitis.AcombinationofcorticosteroidswithothermydriasisagentsiseffectiveformostASassociatedwithuveitispatients.Ingeneral,theprognosisisgoodinthesecases.
简介:Choroidalneovascularization(CNV)isanuncommoncomplicationassociatedwithamacularhole.Inthiscasereportofararecondition,wepresentapathologicmyopiapatientwithaco-existentmacularholeandchoroidalneovascularmembrane.ThepatientwastreatedwithphotodynamictherapyforCNV,andthenvitreoussurgeryfortheretinaldetachmentandmacularhole.Attheendof4yearsfollow-up,hervisualacuitywasimprovedto0.1whilethemacularholeremainedopen.OpticalcoherencetomographyisausefulinspectionmethodofthediagnosisofCNVandmacularhole.