学科分类
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4 个结果
  • 简介:目的:通过对比姜黄素与Avastin抑制大鼠碱烧伤后角膜新生血管(cornealneovascularization,CNV)及血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)表达水平的影响,进一步探讨姜黄素抑制CNV形成的机制。方法:选取SD大白鼠共30只,建立碱烧伤模型,随机将大鼠分成A,B两组,各15只,A组中右眼为实验组A1组,左眼为空白对照组A2;B组中右眼为实验组B1,左眼为空白对照组B2。A1组给予40μmol/L姜黄素配置成的滴眼液,A2组滴用生理盐水;B1组给予5g/LAvastin滴眼液,B2组滴用生理盐水。根据不同时间点取角膜组织进行病理切片研究、抽取房水进行ELISA测定,计算出每视野计数微新生血管及房水中VEGF含量。对以上指标进行对比分析研究。结果:两种药物均未发现在角膜水肿、角膜修复等方面的毒副作用。对新生血管的影响,两种药物CNV计数均明显低于空白对照组(P〈0.01),两种药物之间对新生血管影响的对照,平均CNV计数无显著性区别。A1组与A2组对比、B1组与B2组对比,实验组VEGF均明显低于对照组,有高度显著性统计学意义(P〈0.01),A1组与B1组对照,平均VEGF含量A1组高于B1组,有统计学意义(P〈0.05)。结论:姜黄素的VEGF抑制能力可能不如Avastin,但在整体抗CNV的能力上并不输于Avastin,说明姜黄素还参与了干预角膜碱烧伤CNV形成的其他机制。

  • 标签: 姜黄素 AVASTIN 角膜新生血管 血管内皮生长 因子
  • 简介:目的:探讨玻璃体腔注射贝伐单抗(bevacizumab)联合Ex-press青光眼引流管植入术治疗新生血管性青光眼的疗效和安全性。方法:对18例19眼新生血管性青光眼患者,先行玻璃体腔注射bevacizumab,待虹膜新生血管消退或萎缩后,再行Ex-press青光眼引流管(P-200)植入术,其中6例6眼联合超声乳化白内障吸除术。根据患者屈光介质情况术前或术后尽量行全视网膜光凝。Ex-press植入术后随访12mo,观察视力、眼压和手术并发症情况。结果:玻璃体腔注药后2~7d,16眼新生血管全部消退。术后平均眼压:1mo:13.05±2.46mmHg,3mo:13.80±1.88mmHg,6mo:14.30±1.38mmHg;12mo:14.60±1.43mmHg,术后1,3,6,12mo眼压与术前相比均有显著性差异(P<0.05),且术后1,3,6,12mo眼压相比均无显著性差异(P>0.05)。19眼术后视力有提高者4眼,无明显改变15眼,无视力下降眼,完全成功11眼(58%),部分成功5眼(26%),总手术成功率84%(16/19)。术后并发症:有2例术后早期短暂浅前房,散瞳1wk后前房恢复正常,1例前房少量积血,无排斥反应和严重并发症。结论:玻璃体腔注射bevacizumab可使新生血管青光眼虹膜新生血管迅速消退或萎缩,为下一步青光眼手术创造良好的条件。Ex-press青光眼引流管植入术是新的滤过性手术,该手术创伤小,不用切除虹膜,减少了术中、术后出血的风险,联合bevacizumab是治疗新生血管性青光眼的安全而有效的术式。

  • 标签: Ex-press植入术 新生血管性青光眼 玻璃体腔 注射 贝伐单抗
  • 简介:AIM:Toinvestigatethediffusioncharacteristicsofwaterofopticnerveandopticradiationinhealthyadultsanditsrelatedfactorsbydiffusiontensorimaging(DTI)at3T.METHODS:Atotalof107healthyvolunteersperformedheadconventionalMRIandbilateralopticnerveandopticradiationDTI.TheprimarydataofDTIwasprocessedbypost-processingsoftwareofDTIstudio2.3,obtainingfractionalanisotropyvalue,meandiffusivityvalue,principalenginevalue,orthogonalenginevaluebymeasuring,andanalyzedbytheSPSS13.0statisticalsoftware.RESULTS:Thebilateralopticnerveandopticradiationfiberspresentedgreencolorindirectionalencodedcolor(DEC)mapsandpresentedhighsignalinfractionalanisotropy(FA)maps.TheFAvalueoftheleftopticnervewas0.598±0.069andtherightwas0.593±0.065;themeandiffusivity(MD)valueoftheleftopticnervewas(1.324±0.349)×10-3mm2/sandtherightwas(1.312±0.350)x10-3mm2/s;theprincipalenginevalue(λ?)oftheleftopticnervewas(2.297±0.522)×10-4mm2/sandtherightwas(2.277±0.526)×10-3mm2/s;theorthogonalenginevalue(λ⊥)oftheleftopticnervewas(0.838±0.285)×10-3mm2/sandtherightwas(0.830±0.280)×10-3mm2/s;theFAvalueoftheleftopticradiationwas0.636±0.057andtherightwas0.628±0.056;themeandiffusivity(MD)valueoftheleftopticradiationwas(0.907±0.103)×10-3mm2/sandtherightwas(0.889±0.125)×10-3mm2/s;theprincipaleigenvalue(λⅡ)oftheleftopticradiationwas(1.655±0.210)×10-3mm2/sandtherightwas(1.614±0.171)×10-3mn2/s;theorthogonalenginvalue(λ⊥)oftheleftopticradiationwas(0.531±0.103)×10-3mm2/sandtherightwas(0.524±0.152)×10-3m

  • 标签: magnetic resonance IMAGING diffusion TENSOR IMAGING
  • 简介:AIM:Toaddressissuesininteroperabilitybetweendifferentfundusimagesystems,weproposedawebeyepicturearchivingandcommunicationsystem(PACS)frameworkinconformancewithdigitalimagingandcommunicationinmedicine(DICOM)andhealthlevel7(HL7)protocoltorealizefundusimagesandreportssharingandcommunicationthroughinternet.METHODS:Firstly,atelemedicine-basedeyecareworkflowwasestablishedbasedonintegratingthehealthcareenterprise(IHE)EyeCaretechnicalframework.Then,abrowser/serverarchitectureeye-PACSsystemwasestablishedinconformancewiththewebaccesstoDICOMpersistentobject(WADO)protocol,whichcontainsthreetiers.RESULTS:Inanyclientsysteminstalledwithwebbrowser,clinicianscouldlogintheeye-PACStoobservefundusimagesandreports.Multipurposeinternetmailextensions(MIME)typeofastructuredreportissavedaspdf/htmlwithreferencelinktorelevantfundusimageusingtheWADOsyntaxcouldprovideenoughinformationforclinicians.Somefunctionsprovidedbyopen-sourceOviyamcouldbeusedtoquery,zoom,move,measure,viewOICOMfundusimages.CONCLUSION:Suchwebeye-PACSincompliancetoWADOprotocolcouldbeusedtostoreandcommunicatefundusimagesandreports,thereforeisofgreatsignificanceforteleophthalmology.

  • 标签: PICTURE ARCHIVING and communication system teleophthalmology