简介:摘要直肠肛管周围脓肿是指直肠肛管组织内或其周围间隙内的感染,发展成为脓肿。多数脓肿在穿破或切开后形成肛瘘。任何年龄均可发生。直肠肛管周围脓肿大多起源于肛管直肠壁内感染如肛窦炎等,也可经淋巴传播或肛周毛囊皮脂腺发生感染形成脓肿。粪便内尖锐异物刺破肛管直肠壁而引起周围组织的感染,也可形成肛周脓肿。肛管直肠周围软组织被肛提肌和盆筋膜分为若干间隙,脓肿也常位于这些间隙内,如坐骨直肠窝脓肿、黏膜下脓肿、骨盆直肠窝脓肿和皮下脓肿。肛管直肠周围被丰富的血管、淋巴、脂肪等疏松组织包绕,而这些组织被肛提肌、筋膜及肌束分隔成不同的间隙骨盆直肠周围间隙、直肠后间隙、直肠黏膜下间隙、坐骨肛管周围间隙、肛管后间隙、肛门皮下间隙。而在一般情况下,以肛提肌为界分为肛提肌上间隙和肛提肌下间隙。2007-2009年我们采用一期手术治疗肛周脓肿,高位脓肿配合中医挂线疗法,对直肠肛管周围脓肿患者手术治疗6l例,治疗时间短,费用低,取得较好的疗效。
简介:Characteristicvaluesandtestingmethodsfordeepdrawingprocesses;Comparisonofexperimentalandsimulateresultsforamildsteelandadual-phasesteeldeformedundertensionanddeep-drawing;Computer-aidedprocessdesignsystemforaxisymmetricdeepdrawing;Contactlesson-linemeasurementofmaterialflowforclosedloopcontrolofdeepdrawing;Deepdrawingofnickelfoilandstainlesssteelfoil;
简介:Adatabaseorientedprocesscontroldesignalgorithmforimprovingdeep-drawingperformance,Afiniteelementandexperimentalstudyofsheetdeformationasinfluencedbydrawbeadendgeometry,Anoteondeepdrawingprocess:numericalsimulationandexperimentalvalidation,Anovelrolling-annealingcycleforenhanceddeepdrawingpropertiesinIFsteels,Anoveltechniqueoffrictionaideddeepdrawingusingablank-holderdividedintofoursegments.
简介:Drivesystemoptimizationofhydraulicdeepdrawingpressesfordevelopmentandcommissioning;Economicallaser-cutblanksfordeepdrawing;Effectofanisotropyandprebulgingonhydromechanica!deepdrawingofmildsteelcups;EnhancetheFormabilityofSheetMetalviaSmartTooling;Experimentalandnumericalapproachesofspringbackofhigh-performancesteelsdrawnwithu-shapedtoolsandanindustrialsidemembertool