简介:目的总结1.94μm铥激光“三叶五步剜除法”治疗良性前列腺增生(BPH)的技巧及疗效,并评估其安全性。方法2014年5月15日至2016年5月15日期间,我院应用经尿道1.94μm铥激光手术治疗305例BPH患者。患者平均年龄(70.3±17.8)岁,前列腺体积(71.8士24.3)ml(40~190m1),国际前列腺症状评分(IPSS)(22.8±4.9)分,最大尿流率(Qmax)(7.2±2.8)ml/s,残余尿量(RUV)(97.3±18.4)ml,PSA值(2.9±1.6)ng/ml。手术方法采用“三叶五步剜除法”。结果305例患者均顺利完成手术。手术时间平均(57.2±25.9)min,导尿管留置时间2.7d(1~4d),术后3个月Qmax(23.1±5.2)ml/s,IPSS评分(7.0±3.7)分,RUV(8.9±3.3)ml,与术前相比差异均有统计学意义(P〈0.05)。无电切综合征、继发性大出血、尿道狭窄、排尿困难、远期尿失禁、尿潴留等并发症发生。无新发勃起功能障碍患者。术后组织学检查均诊断为BPH。结论1.94μm铥激光“三叶五步剜除法”组织切除彻底,并发症少,安全性高,是一种较为理想的BPH治疗方法。
简介:Multilayerblackphosphorus(BP)nanoplateletsofdifferentthicknesseswerepreparedbytheliquidphaseexfoliationmethodanddepositedontoyttriumaluminumgarnetsubstratestoformsaturableabsorbers(SAs).Thesewerecharacterizedwithrespecttotheirthickness-dependentsaturableabsorptionpropertiesat3μm.TheBP-SAswereemployedinapassivelyQ-switchedEr:Lu2O3laserat2.84μm.ByusingBPexfoliatedindifferentsolvents,stablepulsesasshortas359nsweregeneratedatanaverageoutputpowerofupto755mW.Therepetitionrateintheexperimentwas107kHz,correspondingtoapulseenergyof7.1μJ.TheseresultsprovethatBP-SAshaveagreatpotentialforopticalmodulationinthemid-infraredrange.
简介:摘要目的观察和评价分析CO2点阵激光联合光动力综合治疗皮肤肿瘤的临床疗效。方法选取2014年10月到2016年2月我院收治的32例经组织病理学确诊的皮肤肿瘤患者为治疗组进行CO2点阵激光联合光动力综合治疗,选取同期的32例经组织病理学确诊的皮肤肿瘤患者为对照组经超脉冲CO2点阵激光治疗,对两组患者进行了临床疗效的比较。结果治疗组完全缓解30例,显效率93.75%。复发2例,复发率6.25%。对照组完全缓解22例,显效率68.75%。复发10例,复发率31.25%。两组相比差异具有统计学意义(P<0.05)。结论CO2点阵激光联合光动力综合治疗皮肤肿瘤疗效满意,可保持面部容貌的完整功能。
简介:AhighlyTm-dopedleadgermanateglassfiberisdevelopedusingtherod-in-tubemethod.The~2μmlaserbeamqualityofthefiberis~1.5.Theleadgermanatecompositefiberjumpersarehomemadeforallthefiberlaserinvestigations.Whencoreispumpedbya1590nmYb/Erfiberlaser,amaximumlaseroutputof313mWisachievedata670mWpumppower,andthecorrespondingslopeefficiencyis~52.8%.Moreover,byusinga2cmlongleadgermanatefiberasthegainmedium,a33mW1942nmTmlaserisalsodemonstrated.
简介:Inthispaper,wepresenttheluminescentpropertiesofTm3+∕Ho3+co-dopednewglass.Aseriesofsilicategermanateglasswaspreparedbytheconventionalmelt-quenchingmethod.IntheTm3+∕Ho3+co-dopedsilicategermanateglass,astrongemissionof2μmoriginatingfromtheHo3+:5I7→5I8transitioncanbeobservedunderconventional808nmpumping.Thecharacteristictemperatures,structure,andabsorptionspectrahavebeenmeasured.TheradiativepropertiesofHo3+inthepreparedglasswerecalculated.TheemissioncrosssectionofHo3+ionstransitioncanreach4.78×10-21cm2around2μm,andtheFWHMisashighas153nm.TheenergytransferefficiencybetweenHo3+andTm3+hasalargevalue(52%),whichindicatestheTm3+∕Ho3+co-dopedsilicategermanateglassisasuitablecandidateforthe2μmlaser.Moreover,theenergytransfermechanismbetweenTm3+andHo3+ionswasinvestigated.
简介:Er~(3+)andLa~(3+)codopedY_2O_3nanocrystallinepowdersweresynthesizedbygelcombustionmethodandcharacterizedwiththermalanalysis,X-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),high-resolutionTEM(HRTEM)techniquesandfluorescencespectroscopy.Afterbeingcalcinedat1200oC,the(Y_(1–x)La_x)_2O_3:Er~(3+)powderswereconfirmedtobecubicY_2O_3phasewiththecrystallinegrainsizeintherangeof20–40nm.TheEr~(3+)emissionat1.53μmfromthe~4I_(13/2)→~4I_(15/2)transitionwasobserved,whichwasfoundtobeenhancedbyintroducingLa~(3+)ions.SuchenhancementcouldbeattributedtotheadjustmentofEr~(3+)ions'localenvironmentbythecodopingofLa~(3+)ions,leadingtotheincreasedgroundstateabsorptioncrosssectionofEr~(3+)ions.