摘要
目的:探讨正常国人肾下段下腔静脉(IVC)CT测量值,为国产下腔静脉滤器的设计及放置提供依据。材料与方法:对100例正常国人用CT机分别测量平静呼吸及Valsalva动作后肾下段下腔静脉长轴、短轴两组数据。结果:平静呼吸时IVC修正后直径的几何均数为19.37mm(14.30~24.40mm),呈偏态分布,与体表面积无直线相关关系。性别和各年龄组间IVC修正直径值无显著差异(P>0.05)。Valsalva动作后IVC修正直径的几何均数为21.23mm(15.60~28.70mm)。经t检验,Valsalva动作后IVC修正直径显著大于平静呼吸时IVC的修正直径(P<0.05)。结论:CT可以直接测量生理状态下IVC大小和变化,具有简便和准确的特点。为避免对IVC大小估计不足,放置下腔静脉滤器时应以Valsalva动作时的修正直径作为参考。
Purpose:Tomeasurethediametersofinfrarenalinferiorvenacava(IVC)inthenor-malpopulationoftheChineseforthedesignandplacementofself-madevenacavalfilter.MaterialsandMethods:Studiedpopulation:100healthpeopleincluing68malesand32femalesranginginagefrom31to78years.TheCTscanwasobtained0.50to1cmbelowtherenalvein.Weperformedthefolowingmeasurements:thelongaxisandshortaxisofIVCduringnaturalrespirationandanearlystageofValsalva′smaneuver.Results:ThecalculatedaveragediametersduringnaturalrespirationandatearlystageofValsalva′smaneuverwere19.37mm(range14.30~24.40mm)and21.23mm(15.60~28.70mm)respectively.Therewasnopositiverelevancebetweencavalsizeandbodysur-faceareas.Therewasnostatisticalysignificantdiferenceincavaldiametersamongthetwosexsanddiferentagegroups.ThecalculatedaveragediametersatearlystageofValsalva′smaneuverwerestatisticalylarger(mean9.03%)thanthatduringnaturalrespiration.Conclusion:CTisareliablemethodtomeasurethetruediameterofIVCunderphysiologicalconditions.Inouropinion,itisad-visabletotakethecalculateddiameterofIVCatanearlystageofValsalva′smaneuverasanindexforselectingintracavalfilterinordertoreducetheriskofplacinganundersizefilter.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1996年第2期109-112,共4页
Chinese Journal of Radiology
关键词
下腔静脉
肾下段
静脉造影术
CT
Venacava,inferiorDatacolectionVenographyTomography,X-raycomputed