简介:目的:研究人工泪液爱丽和倍然对成年近视眼角膜厚度的影响。方法:应用OrbscanⅡ角膜地形图系统(Orbscan,Inc,SaltLakeCity,UT,USA,Version3.00E)对滴人工泪液爱丽或倍然0.5h后的最薄角膜厚度(THN)变化进行测量,38例(76眼)被随机分成爱丽组和倍然组,分别于滴药前和滴药后0.5h进行3次THN测量。结果:两组THN在滴药前无差异(t=0.264),但滴药0.5h后两组THN均显著增加(爱丽组5.57±7.00μm,t=4.906,P〈0.01,倍然组7.89±7.64μm,t=6.369,P〈0.01),两组之间的角膜厚度变化无显著性差异(t=1.381,P〉0.05);爱丽组共有32眼(84%)角膜厚度增加,而倍然组33眼(87%)角膜厚度增加。结论:对生产工艺要求相对严格的人工泪液能短时间内显著增加近视眼角膜厚度,角膜厚度的变化可作为评估人工泪液等眼药制剂舒适度的客观指标之一。
简介:目的探讨慢性鼻窦炎、鼻息肉合并支气管哮喘患者鼻窦炎、鼻息肉治疗对哮喘的影响。方法回顾分析28例慢性鼻窦炎、鼻息肉合并支气管哮喘患者的临床资料,接受鼻内镜手术治疗21例、保守治疗7例。结果21例经鼻内镜手术治疗后,慢性鼻窦炎、鼻息肉治愈11例、好转6例、无效3例、复发1例,治愈率为52.4%、有效率为80.9%;合并的哮喘症状好转15例、无效6例,有效率为71.4%;慢性鼻窦炎、鼻息肉及支气管哮喘均有效13例,有效率为61.9%。保守治疗的7例中,鼻窦炎好转1例、无效3例,有效率为14.3%;哮喘好转2例、无效5例,有效率为28.6%。结论慢性鼻窦炎、鼻息肉合并支气管哮喘经鼻内镜手术治疗鼻窦炎、鼻息肉后,能有效控制哮喘症状的发生。
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
简介:AIM:Toevaluatetheaccuracyofsphericalequivalent(SE)estimatesofadouble-passsystemandtocompareitwithretinoscopy,subjectiverefractionandatablemountedautorefractor.METHODS:Non-cycloplegicrefractionwasperformedon125eyesof65healthyadults(age23.5±3.0years)fromOctober2010toJanuary2011usingretinoscopy,subjectiverefraction,autorefraction(AutokeratorefractometerTOPCONKR-8100,Japan)andadoublepasssystem(OpticalQualityAnalysisSystem,OQAS,VisiometricsS.L.,Spain).Nineconsecutivemeasurementswiththedouble-passsystemwereperformedonasubgroupof22eyestoassessrepeatability.ToevaluatethetruenessoftheOQASinstrument,theSElaboratorybiasbetweenthedoublepasssystemandtheothertechniqueswascalculated.RESULTS:TheSEmeancoefficientofrepeatabilityobtainedwas0.22D.SignificantcorrelationscouldbeestablishedbetweentheOQASandtheSEobtainedwithretinoscopy(r=0.956,P<0.001),subjectiverefraction(r=0.955,P<0.001)andautorefraction(r=0.957,P<0.001).ThedifferencesinSEbetweenthedouble-passsystemandtheothertechniquesweresignificant(P<0.001),butlackedclinicalrelevanceexceptforretinoscopy;Retinoscopygavemorehyperopicvaluesthanthedouble-passsystem-0.51±0.50Daswellasthesubjectiverefraction-0.23±0.50D;Moremyopicvalueswereachievedbymeansofautorefraction0.24±0.49D.CONCLUSION:Thedouble-passsystemprovidesaccurateandreliableestimatesoftheSEthatcanbeusedforclinicalstudies.Thistechniquecandeterminethecorrectfocuspositiontoassesstheocularopticalquality.However,ithasarelativelysmallmeasuringrangeincomparisonwithautorefractors(-8.00to+5.00D),andrequirespriorinformationontherefractivestateofthepatient.