简介:随着研究生招生观念的转变,招收的医学临床专业学位研究生的比重越来越大,对专业型研究生的培养也越来越注重实用。我们在眼科专业型研究生临床培养中,增加病房临床实践时间,特别注重典型病例的示范作用,每一个专业组都会结合自己专业的特点,将典型病例的特点从各个角度展示给广大研究生们,培养其临床诊治思辨能力,培训其显微手术技巧,从临床病历书写到记录总结,结合文献复习,拓展知识结构,锻炼专业型研究生论文书写能力,并以典型病例为基础,扩展知识覆盖面,引申注意事项及特殊病例的诊治。这套严格的培养体系,使专业型研究生能举一反三,从典型病例、重点病例中获取对该种病情的最直观的全景了解与熟悉,以最少的时间掌握最多的临床知识,丰富临床经验,为将来工作岗位中的考核打下基础。
简介:AIM:Toinvestigatethespecialtyoftranscranialsurgerythroughpterionalapproachforremovalofcranio-orbitaltumors,introducetheophthalmologicalexperiencesofenteringtheorbittoreducetheincidencerateofassociatedcomplicationsofthisoperation.·METHODS:Weperformedaretrospectiveanalysisofaseriesof37casesinvolvingpatientswhounderwenttranscranialsurgerythroughpterionalapproachfortreatmentofcranio-orbitaltumorsinourdepartmentinthepast8years.Pterionapproachcraniotomywasperformedtoallpatients.Afterremovingtumorsintheskullbytheneurosurgeon,ophthalmologistremovedtumorsinorbit.Wetookmeasuresbelowtodecreasecomplications,includinggroundingopticcanalthroughanabrasivedrillingwhennecessary,hangingvariousextraocularmusclestobeexposedforprotection,refrigeratingbyrefrigerationheadstoremovetumors,atlastsewinguporbitseptumaftersurgery.·RESULTS:Tumorswereremovedcompletelyin32cases,andincompletein5casesduetoextensiveinvasionintothecavernoussinusorsphenoidsinus.Ofallthecases,benigntumorsweredemonstratedin28cases(75.6%,28/37)andmalignantin9(24.3%,9/37).Themostcommonlesiontypewasmeningiomain11cases(29.7%,11/37).Extraocularmuscles(EOM)impairment,occurringin21cases(56.7%,21/37),wasthemostfrequentpostoperativecomplication.Themostseriousconsequencewasvisionlossoccurredin4cases(10.8%,4/37).Othercomplications,suchas11casesoftransientblepharoptosis29.7%(11/37),5casesofmydriasisin13.5%(5/7);2casesofcerebrospinalrhinorrheain5.4%(2/37).·CONCLUSION:Cranio-orbitaltumorscanberemovedcompletelyusingtranscranialapproach,andthepterionalapproachoffersexcellentexposure.Cooperationofinterdisciplinaryteamofneurosurgeonsandophthalmologistsconducestofulluseofrespectiveprofessionaladvantages.Theexperienceofophthalmicoperationtechnologycandecreaseoccurrenceofocularcomplicationsaftersurger
简介:目的:确定黄酮对人角膜内皮细胞(humancornealendothelialcells,HCEC)的影响及其对因氧化损伤所致细胞凋亡的抗氧化保护作用。方法:利用体外培养的HCEC,通过添加不同浓度的黄酮继续培养,或经不同浓度黄酮预处理后再添加过氧化氢(H2O2)继续培养,采用光镜形态观察、吖啶橙/溴化乙锭(AO/EB)双染色和DNA琼脂糖凝胶电泳等技术手段,研究黄酮对HCEC的影响及其抗氧化作用。结果:黄酮浓度高于85μmol/L时可诱导HCEC发生细胞凋亡,而低于70μmol/L时对HCEC没有影响;55和70μmol/L黄酮预处理对600μmol/LH2O2所引起的HCEC细胞凋亡具有显著的抑制作用(60%→22%,8%;P〈0.01),而85和100μmol/L黄酮预处理对H2O2所引起的HCEC细胞凋亡没有显著的抑制作用。结论:55~70μmol/L黄酮对HCEC具有显著的抗氧化保护作用,而浓度高于85μmol/L的黄酮反而能诱发HCEC发生细胞凋亡。
简介:目的:观察角膜缘干细胞培养液对血管内皮细胞增殖的影响。方法:分别培养角膜缘干细胞及球结膜上皮细胞,并通过免疫组化检测AE-5蛋白鉴别角膜缘干细胞。搜集两组培养细胞的上清液加入培养的人脐静脉血管内皮细胞中,并设立对照组。培养24h后通过MTT法检测细胞增殖情况并进行统计学分析。结果:角膜缘干细胞AE-5染色呈阴性,而球结膜上皮细胞为阳性。加入角膜缘干细球结膜上皮细胞和对照组培养液的血管内皮细胞MTT值分别为2.097±0.079,1.981±0.034和1.990±0.044。三组间有显著性差异(F=9.169,P=0.000)。加入角膜缘干细胞培养上清液的血管内皮细胞增殖活性明显高于其他两组(P=0.005和P=0.007)。结论:角膜缘干细胞培养液能够促进血管内皮细胞的增殖,这可能是角膜缘干细胞的特征。本研究从功能学角度为角膜缘干细胞理论提供更多的依据。
简介:AIM:Tostudythedistributionofocularhigher-orderaberrations(HOAs)andmesopicpupilsizeinindividualsscreenedforrefractivesurgery.·METHODS:OcularHOAsandmesopicpupilsizewerestudiedin2458eyesof1240patientswithmyopia,myopicastigmatismandcompoundmyopicastigmatismand215eyesof110patientswithhyperopia,hyperopicastigmatismandcompoundhyperopicastigmatismusingtheZywaveaberrometer(Busch&Lomb).Allpatientshadcorrectablerefractiveerrorswithoutahistoryofrefractivesurgeryorunderlyingdiseases.Root-mean-squarevaluesofHOAs,totalsphericalaberration,totalcomaandmesopicpupilsizewereanalyzed.OcularHOAsweremeasuredacrossa≥6.0mmpupil,andpupilsizemeasurementswereperformedunderthemesopiccondition.·RESULTS:ThemeanvaluesofHOAs,totalsphericalaberrationandtotalcomainthemyopicgroupwere0.369μm,±0.233,0.133±0.112μmand0.330±0.188μm,respectively.InthehyperopicgroupthemeanvaluesofHOAs,totalsphericalaberrationandtotalcomawere0.418μm±0.214,0.202±0.209μmand0.343±0.201μm,respectively.HyperopesshowedgreatertotalHOAs(P<0.01)andtotalsphericalaberration(P<0.01)comparedtomyopes.Inage-matchedanalysis,onlytheamountoftotalsphericalaberrationwashigherinthehyperopicgroup(P=0.05).Mesopicpupilsizeinthemyopicgroupwaslarger(P≤0.05).·CONCLUSION:TheresultssuggestedthatsignificantlevelsofHOAswerefoundinbothgroupswhichareimportantforplanningrefractivesurgeriesonIranians.Thereweresignificantlyhigherlevelsoftotalsphericalaberrationinhyperopescomparedtomyopes.Mesopicpupilsizewaslargerinmyopicgroup.
简介:研究内源性大麻素N-花生四氢酸氨基乙醇(anan-damide,AEA)对体外培养的牛眼小梁细胞细胞骨架及PGE2表达的影响。方法:对牛眼小梁细胞进行原代及传代培养,并行鉴定。对传3代的牛眼小梁细胞分别施加AEA浓度分别为0,0.1,1.0,10/μmol/L的无血清培养液,作用24h后提取细胞上清液,并将细胞置于倒置显微镜下摄像,计算机图像分析系统计算细胞面积。用ELISA法检测PGE2浓度的变化。结果:AEA可以产生明显的细胞舒张效应,呈浓度依赖性。而且在一定范围内可以成剂量依赖性的促进PGE2的表达。与对照组均有显著性差异(P〈0.05)。结论:AEA可引起小梁细胞的舒张和促进PGE2的释放。