糖尿病下肢血管超声

2ndAffiliatedHospital,ZhejiangUniversityCollegeofMedicine

ZhuJiang

DuplexultrasoundscanningofLowerextremityarterialdiseaseinpatientswithdiabetesIntroduction

Lowerextremityarterialdisease(LEAD)isachronicischaemiacausedbyatherosclerosisoftheperipheralarteries.Diabetesmellitusisariskfactorforthisdisease.Duplexultrasoundscanning(DUS),anon-invasiveandlowcostimagingmodality,hasbeenextensivelyusedtoinvestigateperipheralarterialdisease(PAD).Earlydetection,earlytherapy,reducetheriskofcriticallimbischaemiaandlimbloss.CompanyLogoDigitalsubtractionangiography(DSA)1Duplexultrasoundscanning(DUS)2Magneticresonanceangiography(MRA)3Computed

tomographicangiography(CTA)4Non-invasiveimagingtechniquesCompanyLogoDuplexultrasoundscanningUltrasonicduplexscanningcandirectlyvisualizevessels,providinginformationonarterywallthickness,degreeofflowturbulence,andchangesinbloodflowvelocityCompanyLogoDuplexultrasoundscanningCompanyLogoDuplexultrasoundscanningCompanyLogoDuplexultrasoundscanningCompanyLogoCompanyLogoDuplexultrasoundscanningCompanyLogo外周动脉病变分级标准分级表现正常三相波型，无频带增宽内径减少1-19%三相波型伴有轻微频带增宽，与相邻近心端动脉段相比，收缩期峰值流速增高<30%,近心端及远心端动脉频谱正常内径减少20-49%保持三相波型，反向血流成分可能减少，频带增宽明显，有频窗充填，收缩期峰值流速升高30%-100%，远心端及近心端动脉频谱正常内径减少50-99%单向无反向成分频谱，全心动脉周期均为正向血流，频带明显增宽，收缩期峰值流速>100%。远心端动脉为单相频谱，且收缩期流速降低闭塞所显示动脉段无血流信号，远心端动脉为单相频谱且收缩期流速降低DuplexultrasoundscanningCompanyLogoDuplexultrasoundscanningCompanyLogoDuplexultrasoundscanning下肢动脉狭窄分级的流速判断标准狭窄程度（%）峰值流速（m/s）峰值流速之比正常＜1.5＜1.5:10~491.5~2.01.5~2:150~742.0~4.02~4:175~99＞4.0＞4:1闭塞——CompanyLogoDuplexultrasoundscanningCompanyLogoDuplexultrasoundscanningCompanyLogo

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