人工全髋关节置换术后脱位原因课件

《人工全髋关节置换术后脱位原因课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、人工全髋关节置换术后脱位发生率Theaverageincidenceofdislocationaftertotalhiparthroplastyisapproximately3%.factorsahistoryofprevioushipsurgeryorrevisiontotalhipreplacement（7.4%）aposteriorsurgicalapproach（5.8%vs2.3%）faultypositioningofoneorbothcomponentsimpingementofthefem

2、uronthepelvisorresidualosteophytesimpingementoftheneckofthefemoralcomponentonthemarginofthesocketinadequatesoft-tissuetensioninsufficientorweakabductormusclesavulsionornonunionofthegreatertrochanternoncomplianceorextremesofpositioningintheperioperativeper

3、iodfactorsAge,height,andweightdonotseemtobecausativefactorsinmanyseries,dislocationoccurredinwomenmoreoftenthaninmen.apreoperativediagnosisofosteonecrosis,proximalfemoralfractureornonunion,orinflammatoryarthritis.Likelycontributingfactorsincludeextensives

4、oft-tissuerelease,muscularweakness,smallfemoralheadsize(22mm),andtrochantericnonunion.后外侧入路脱位高发的原因atendencytoretrovertthesocketnadequateanteriorretractionofthefemur,sotheacetabularpositioningdeviceisforcedposteriorlyduringcomponentinsertionDivisionofallth

5、eshortexternalrotators防止发生脱位的策略fixingthecupintheproperpositionjudgethepositionofthepatient'spelvisinthehorizontalandverticalplaneswomenwithbroadhipsandnarrowshouldersmenwithanarrowpelvisandbroadshoulderstruepositionofthepelvisalwaysmustbetakenintoaccount防

6、止发生脱位的策略Thefemoralcomponentshouldbefixedwiththeneckin5to10degreesofanteversion（15degreesisacceptable）developmentaldysplasiaorjuvenilerheumatoidarthritis,cancauseerrorinjudgingthecorrectposition（anteversion）Retroversionofthefemoralneckmaybeencounteredwiths

7、lippedcapitalfemoralepiphysis,oriftheneckisresectedatanexcessivelylowlevel.防止发生脱位的策略Boneorcementprotrudingbeyondtheflatsurfaceofthecupcancauseimpingementandmustberemovedafterthecuphasbeenfixedinplace.ifthegreatertrochanterisenlargedordistorted,someboneoft

8、enmustberemovedfromitsanteriororposteriormargintopreventimpingement.bonyimpingementismuchmorelikelyiffemoraloffsethasnotbeenadequatelyrestored.Theuseofafemoralcomponentwithenhancedoffsetcanbeverybeneficialinthissitu