文档介绍：该【《自然生产》 】是由【相惜】上传分享，文档一共【90】页，该文档可以免费在线阅读，需要了解更多关于【《自然生产》 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。自然生產楊明智整理pptFactorsrelatedtoBirthPassage–BirthcanalPassenger–FetusPower–Forceofuterinecontraction整理pptPelvicAnatomy4bones–sacrum,yx,twoinnominatebonesThetruepelvisisboundedabovebythepromontoryandalaeofthesacrum,thelineaterminalis,andtheuppermarginsofthepubicbones,,bentcylinderwithanteriorwallheight5cm,andtheposteriorwall,–avity整理ppt整理pptPelvicJointsSymphysispubisconsistsoffibrocartilage,thesuperiorandinferior(arcuateligament)–,andincreasedduringthelast3m,,greatestindorsallithotomyposition,andmay↑.(Shoulderdystocia)整理pptPlanesandDiametersofthePelvisTheplaneofthepelvicinlet –thesuperiorstraitTheplaneofthepelvicoutlet –theinferiorstraitTheplaneofthemidpelvis –theleastpelvicdimensionsTheplaneofgreatestpelvicdimension –ofnoobstetricalsignificance整理pptPelvicInlet4typesinshape–gynecoid(50%),anthropoid,android,–anteroposterior,transverse,and2obliquesObstetricalconjugate––theA-Pdiameterofthepelvicinlet整理pptMidpelvisPlaneoftheleastpelvicdimensions,,10cmorso,,,,––A-P,trans.,posteriorsagittal整理pptPelvicShapesCaldwell-Moloyclassification Anteriorsegment–Transversediameter–Posteriorsegment –suitedfordeliveryof mostfetuses,50% –poorprognosisforvaginal delivery –APdiameter>trans. diameter,1/3 –shortAPdiameterand widetransversediameter,<3%整理ppt