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1、AbnormalUmbilicalCordLiquorVolumeAbnormalityPrematureDeliveryPrematureRuptureofMembraneProlongedPregnancy,MultiplePregnancyWomenHospital,SchoolofMedical,ZheJiangUniversityWangZhengPingAbnormalUmbilicalCordAbnormalcordlengthCordentanglementKnotofcordTorsionofcordAbnormalcordinsertionCordpresenta
2、tionandcordprolapseSingleumbilicalarteryAbnormalcordlengthNormalcordlengthis30-70cm,averagely55cmShortcord:<30cmisdefinedasshortcord,mayleadtofetaldistress,placentalabruptio,prolongedlabourLongcord:>80cmisdefinedaslongcord,higheroccurrenceofcordaroundneck,cordaroundbody,cordknot,cordprolapseandcord
3、compressionAbnormalcordinsertionMarginalcordinsertionintoplacenta,knownasracketplacentaCordinsertionontomembrane,runsbetweenchorionicmembraneandamnioticmembranebeforeinsertingintoplacenta,knownasvelamentouscordinsertionBloodvesselsonmembranepassinginternalcervicalosanteriortofetalpresentingpart,kno
4、wnasvasapreviaVelamentouscordinsertion,commonlyseenwithsingleumbilicalarteryInvasapreviarupture,bloodlossof200-300mlcanleadtofetaldemisevelamentouscordinsertionvelamentouscordinsertionCordpresentationandCordprolapseCordlocatedanteriororlateraltofetalpresentingpart,knownascordpresentation,alsoknowna
5、soccultcordprolapseAtmembranerupture,cordprolapseoutofcervicalos,descendingintovagina,knownascordprolapseCordprolapseislife-threateningtothefetusCordpresentationCordprolapseKnotofcordCordentanglementCordentanglementAbnormalLiquorVolumePolyhydramniosOligohydramniosPolyhydramniosDefinedasamnioticflui
6、dvolumemorethan2000mlatanyperiodofgestationIncidence0.5%-1.6%Ifamnioticfluidvolumeincreaseprogressivelyovermonths,thesymptomsareusuallymilder,knownaschronicpolyhydramniosIfamnioticfluidvolumeincreaserapidlyoverdays,cancausseseverecompressionsymptoms,knownasacutepolyhydramniosFetalstructuraldeformit
7、y:(neuraltubedefect,NTD)UltrasoundexaminationAmnioticfluidindex,AFI>18cmorAFI>20cmDepthoflargestamnioticfluidpool(amnioticfluidvolume,AFV)>=7cmAFV8-11cm,asmildpolyhydramniosAFV12-15cm,asmoderatepolyhydramni