简介:[摘要]:17-4PH高强度不锈钢,在口腔正畸材料中获得了良好应用,显示它不仅具有高强度,还具有良好工艺性、生物相容性和良好的耐腐蚀性。17-4PH不锈钢的最大特点是它的高强度和耐腐蚀性,以及制成粉末还可适应当前正在发展的3D打印技术和粉末铸造成型技术。17-4PH不锈钢的良好工艺性能,能满足不同成形方法的要求,在正畸托槽和正畸颊面管等口腔器械产品中得到广泛应用。17-4PH高强度不锈钢,在口腔正畸材料应用中,具有高强度和良好的工艺性,良好的生物相容性和耐腐蚀性,无致敏反应、无口腔粘膜刺激性、无细胞毒性、无亚急性全身毒性。
简介:摘要目的总结老年急腹症的病因、临床特点及治疗效果。方法回顾分析2015年5月至2017年5月期间诊治的42例以急性腹痛为首发症状的老年患者的临床资料。结果42例患者手术治疗的29例(占69.05%),非手术治疗13例(占30.95%);治愈34例(占80.95%),好转7例(占16.67%),死亡1例(占2.38%)。死亡原因为中毒性休克、多脏器功能衰竭。结论老年急腹症病因较复杂,临床表现不典型,病情变化快,并发症多,部分患者早期难以确诊,需综合运用多种诊断方法,必要时手术探查。老年患者合并的基础疾病较多,手术风险大,术前须对病情有充分的评估,权衡利弊,慎重选择手术治疗方法。
简介:ObjectivesToinvestigatetheclinicalmanifestationsofhypertrophiccardiomyopathy(HCM),andtofindouttheclinicalcluestoavoidmisdiagnosisandprovidereferenceforfutureclinicaldiagnosisandtreatment.MethodsAretrospectiveanalysisof42consecutivepatientswithHCMhospitalizedinourhospitalbetweenJanuary1995andDecember2002wasexplored.BasedonthefamilyhistoryofHCM,clinicalmanifestations,electrocar-diogram,echocardiogram,coronaryangiographyandleftventriculography,theclinicalcharacteristicsbetweenHCMpatientswithleftventricularoutflowtractobstruction(HOCM)andHCMpatientswithoutobstruction(HNOCM)werecompared.Thecausesofmisdiagnosisandlosingdiagnosiswereanalysis.Results13patientswereinHOCMgroupand29patientswereinHNOCMgroup.MorepatientswithsyncopewereinHOCMgroupthaninHNOCMgroup(6/13vs.2/29,P<0.05).PatientswithejectivemurmurwereinHOCMgrouponly(P<0.01).Leftventricularoutflowtractpressuregradient(LVOTPG)onlyobservedinHOCMgroup(P<0.01).Ventriculartachycardiawasseeninbothgroups.28outof42patients(66.67%)hadmisdiagnosis,and4outof42patients(9.53%)hadlosingdiagnosis.Thus,coronaryheartdisease(CHD)hadthehighestrateofmisdiagnosis.Therewere20CHDpatients(71.43%)among28patientswithmisdiagnosis.Hypertensionwasin3,congenitalheartin2,cerebro-embolismin2,andmyocarditisin1.ConclusionsForapatientwithfamilyhistoryorsuddendeathhistoryofHCM,unexplainedsyncopeepisodes,chestpain(angina),especiallyinyoung,anejectionmurmuralongtheleftsternumborder,thepresenceofnarrowanddeepQwaves,orinversionofgiantTwavesinV3-V6,atrialfibrillationand/orcerebra-embolismechocardiogramshouldbegiven.CAGandLVGarenecessaryonlyiftheresultofechoisnegative,andthepatientswithsuspectedHCMorCHD.