下肢动脉闭塞性疾病多普勒波形的临床分析

目的提高多普勒超声对下肢动脉闭塞性疾病的诊断水平。方法用方向性多普勒血流仪对１２０条正常下肢和６６条动脉闭塞性病变下肢动脉血流进行了分段检测。对正向波峰速（ＰＦＶ）、反向波峰速（ＰＲＶ）、加速时间（ＡＴ）和减速时间（ＤＴ）进行了测量和比较。结果正常组下肢动脉流速从近到远逐渐减慢，其远心端ＰＦＶ、ＰＲＶ、ＡＴ和ＤＴ与近心端的比值均＜１．０。病变组的ＰＦＶ和ＰＲＶ均比正常组慢（Ｐ＜０．０１），而ＡＴ和ＤＴ则长于正常组（Ｐ＜０．０１），同时发现狭窄（＞５０％）或闭塞（有侧支循环形成）部位远端与近端ＤＴ的比值＞１．０。结论与动脉造影相比较，多普勒超声定位诊断的符合率为９１％（６０／６６）。

Clinical analysis of Doppler waveform in arterial occlusive disease in the lower limbs

Objective In order increase the diagnostic standard of Doppler ultrasound to arterial occlusive disease in the lower limbs.Methods 120 normal lower limbs and 66 lower limbs with arterial occlusive disease were measured by directional Doppler blood velocity detector in different segments.The peak forward velocity(PFV),peak reverse velocity(PRV),acceleration time(AT),and deceleration time(DT) were determined and compared.Results The blood flow velocity of the lower limb arteries was gradually slowed down from the proximal to the distal in the normal group.The ratio of distal to proximal PFA,PRV,AT and DT was less than 1 0. PFV and PRV in the disease group were slower than in the nornal group( P <0 01).AT and DT in the disease group were longer than in the normal group( P <0 01).It was discoverd that the ratio of distal to proximal DT was greater than 1 0 in arterial stenosis(>50%)or occlusion (collateral artery development).Conclusion The results were compared those of arteriogrphy.The diagnostic coincidence ratio of Doppler ultrasound for localization was 91%(60/66).