简介：Objective:ToexplorethepreparativemethodandstudythedegradationcharacteristicsofbonerepaircompositeofDL-polylacticacid(PDLLA)/hydroxyapatite(HA)/decalcifyingbonematrix(DBM)invitro.Methods:AnemulsionblendmethodwasdevelopedtopreparethecompositeofPDLLA/HA/DBMinweightratioofPDLLA:HA:DBM=1.5-2:1-1.5:1.Thedynamicchangesofweight,biomechanicalpropertyandpHvalueofPDLLA/HA/DBMandPDLLAinphosphatebufferedsaline(PBS,pH7.4)werestudiedrespectivelythroughdegradationtestsinvitro.Results:Withoutbeingheated,PDLLA,HAandDBMcouldbesynthesizedwiththeemulsionblendmethodasbonecompositeofPDLLA/HA/DBM,whichhadbothosteoconductiveandosteoinductiveeffects.Thediameteroftheaperturewas100-400μmandthegapratewas71.3%.Duringdegradation,thepHvalueofPDLLAsolutiondecreasedlightlywithin2weeks,butdecreasedobviouslyattheendof4weeksandthevaluewas4.0.WhilethepHvalueofPDLLA/HA/DBMkeptquitesteadyandwas6.4attheendof12weeks.TheweightofPDLLAchangedlittlewithin4weeks,thenchangedobviouslyandwas50%ofitsinitialweightattheendof12weeks.WhiletheweightofPDLLA/HA/DBMchangedlittlewithin5weeks,thenchangedobviouslyandwas60%oftheinitialweightattheendof12weeks.TheinitialbiomechanicalstrengthofPDLLAwas1.33MPa,decreasedlittlewithin3weeks,thenchangedobviouslyandkeptat0.11MPaattheendof12weeks.TheinitialbiomechanicalstrengthofPDLLA/HA/DBMwas1.7MPa,decreasedlittlewithin4weeks,thenchangedobviouslyandkeptat0.21MPaattheendof12weeks.Conclusions:Theemulsionblendmethodisanewmethodtopreparebonerepairmaterials.Asanewbonerepairmaterial,PDLLA/HA/DBMismoresuitableforregenerationandcellimplantation,andtheenvironmentduringitsdegradationisadvantageoustothegrowthofbonecells.

简介：摘要目的分析DL-96II微生物检测系统在临床的应用效果。方法选取卫生部临床检验中心下发的30株室间质控菌株（2016年~2018年）作为检测对象，运用DL-96II微生物检测系统与API微生物鉴定系统进行细菌鉴定和药敏分析，并将结果与卫生部临检中心回报的结果进行比较，分别比较两种检测系统的菌种鉴定符合率和DL-96II系统的药敏结果符合率。结果DL-96II系统的菌种鉴定符合率为86.67%，API系统的菌种鉴定符合率为96.67%，二者没有明显的差异（p值＞0.05），DL-96II系统的药敏结果符合率为97.83%。结论DL-96II微生物检测系统的菌种鉴定准确率与API系统的相近，且药敏结果符合率很高，值得在基层医院推广使用。

简介：