简介:摘要目的探讨腹腔镜胆囊切除术(LC)后胆总管胰腺段结石残留的临床特征。方法对本院2003年1月至2012年12月29例LC术后胆总管胰腺段结石残留患者的临床资料进行回顾性分析。结果29例患者首次手术行LC术前诊断为胆囊结石,无胆总管探查指征。但术后发现有胆总管胰腺段结石,其中,经彩超确诊10例,MRCP确诊19例。处理ERCP+EST取石成功8例,开腹胆总管切开取石14例,腹腔镜胆总管探查取石3例,保守治疗好转4例。结论LC术后胆道结石的残留为术前和术中漏诊所致,主要受原有诊断和结石较小、数目较少、位置隐蔽的干扰。术前检查胆囊结石细小结石,尤其是伴有肝酶升高时,最好增加MRCP检查。术中发现胆囊颈管较粗时,最好能行术中胆道造影或胆道镜检查。
简介:建立槟榔中槟榔碱的高效液相色谱-电喷雾质谱(HPLC—ESI-MS)检测方法。通过优化色谱和质谱条件,以β-蒎烯为内标物,利用质谱定性和色谱定量测定槟榔碱的含量。槟榔碱在质量浓度为10.8~86.4μg/mL时的线性关系良好,R=0.9985;最低检测限为0.4μg/mL(S/N=3);最低定量限为0.9μg/mL(S/N=10);平均回收率为98.32%,RSD为3.44%(n=5)。该方法具有流动相简单、分析时间短,以及不需对样品进行衍生,操作简便、定量准确和抗干扰能力强等优点。
简介:OnOctober27,2001,alargeearthquakewithMs6.0,namedtheYongshengearthquake,occurredalongtheJinshajiangsegmentofChenghaifaultinYongshengCounty,YunnanProvince.ItisthelargesteventtooccuralongtheChenghaifaultinthelast200years.Theseismo-geologicalsurveyshowsthattheseismogenicfault,whichistheJinshajiangsegmentofChenghalfault,takesleft-lateralstrike-slipasitsdominantmovementpattern.Accordingtodifferencesinverticalmotion,motiontime,landformsandscales,theChenhalfaultcanbedividedintoeightsegments.TheJinshajiangsegmenthasaverticaldislocationrateof0.4mm/a,farlowerthanthemeanrateoftheChenghaifault,about2.0mm/a.It'sdeducedthatthetwosidesofJinshajiangsegment'stuck'tightlyandhinderedthestrike-slipoftheChenghaifault.ThestrongearthquakedistributionbeforethiseventshowsthattheJinshajiangsegmentwasintheseismicgap.TheChenghaifault,asaboundaryoftectonicsub-blocks,makestheNorthwestYunnanblockandtheMiddleYunnanblockmoveclockwise,andtheirmarginsmoveoppositelyalongtheChenghalfault.InthemotionprocessoftheChenghaifault,structuralhindranceandtheseismicgapofstrongearthquakesarepropitioustotheconcentrationandaccumulationofstructurestress.Asaresult,theYongshengMs6.0earthquakeoccurred.TheSujiazhuang-ShangangfusegmentissimilartotheJinshajiangsegmentwithalowverticalmotionrateof0.3mm/aandintheseismicgap.Soit'spostulatedthatthesegmentmaybecomeanewstructurehindrance,andtheYongshengMs6.0earthquakemaytriggertheoccurrenceoffuturelargeearthquakesalongthissegment.
简介:Thechangelawsofintensityofnearly200moderate-smallearthquakeswithMs=2.0~5.5occurringontheChinesemainlandsince1954havebeenanalyzedandarecomparedwiththatofmoderatelystrongearthquakes(Ms≥5.0).Theresultsshowthatthereisquiteobviousregionalityinthestatisticallawsbybothmoderate-smallearthquakesandmoderatelystrongearthquakes:attenuationofintensityinEasternChinaisslowerthanthatinWesternChinaandtheratioofthemajoraxistotheminoraxisofiso-seismallinesinEasternChinaissmallerthanthatinWesternChina.Theresultsalsoshowthatforafixedmagnitudetheattenuationofintensityofmoderate-smallearthquakesisfasterwhenintensityishigherthanV+andslowerwhenintensityislowerthanV-incomparisonwiththatofmoderatelystrongearthquakes.Furthermore,therealsohavebeensomedifferencesintheaspectsasintensity-magnituderelationbetweenstatisticallawsofmoderate-smallearthquakesandmoderatelystrongearthquakes.Thesedi