- 1、本文档共42页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
NeonatalRespiratoryDistressSyndrome
新生儿呼吸窘迫综合征
AlsoknownashyalinemembranediseaseOverviewHMD肺透明膜病2
OverviewMostcommondisorderinpreterminfantsSurvival90%Sequelae:chroniclungdisease慢性肺疾病Progressivelyrespiratorydistressafterbirth3
OverviewIncidenceTerm 2%36weeks 5%32weeks 25%28weeks 70%26weeks 90%Incidenceandseverityincreasewithdecreasinggestationage4
RDSProphylaxisEtiologyPathophysiologyClinicalPresentationsManagementDiagnosis5
EtiologyStructuallyimmaturelungDecreasednumberandsizeofalveoli肺泡WeakchestwallmusclesPulmonarysurfactant(PS)deficiency肺表面活性物质缺乏ConfirmedbyAveryMeadin19596
EtiologyMaturelungImmaturelung7
WhatisPS?Acomplexmixtureofphospholipids磷脂andproteinsSynthesizedandsecretedbyalveolartypeⅡcells肺泡Ⅱ型细胞Begintoproducefrom20-24weeksgestationandincreaserapidlytill35weeks8
RolesofPSDecreasessurfacetension表面张力atair-liquidinterfaceKeepslungalveoliopenStablizefunctionalresidualcapacity(FRC,功能残气量)Maintainnormaloxygenation氧合andventilation通气9
RolesofPSSurfacetension表面张力10
RolesofPSSurfactantspreadsoutoversurfaceofalveoluswithweakerbondingINFLATION吸气InhalationSurfactantcompressedoversurfaceofalveoluswithstrongerbondingandreducesincreasingsurfacetensionEXPIRATIONExhalation呼气(Laplace’slaw)11
PathophysiologyDiminishedsurfactantSupressedsurfactantsynthesis/activityImpairedcellularmetabolismDeterioratedbloodgasDefectedgasdiffusion气体弥散障碍↑pCO2,↓pO2,↓pHVentilation-perfusionmismatching通气血流比例失调Generalizedatelectasis广泛性肺不张ProteinaceousdebrisleakageHyalinemembraneformation肺透明膜形成PrematuritySurfactantdeficiencyViciouscircle12
RiskFactorsPrematurity早产Infantsofdiabeticmothers糖尿病母亲婴儿Cesareandeliverywithoutlabor无宫缩剖腹产Perinatalasphyxia围产期窒息Multiplebirth多胎妊娠Male男性13
ClinicalPresentationsTachypnea气促Grunting呻吟Nasalflaring鼻搧Ches
文档评论(0)