彩色多普勒血流显像检测下肢静脉瓣返流

目的：为探讨彩色多普勒血流显像（ＣＤＦＩ）检测静脉瓣返流的准确性。方法：４０条正常和３０条慢性静脉瓣功能不全（ＣＶＩ）下肢进行了ＣＤＦＩ检查，将下肢静脉分为股总静脉（ＣＦＶ）、股浅静脉（ＳＦＶ）、静脉（ＰＰＶ）、胫后静脉（ＰＴＶ）和隐股连接部（ＳＦＪ）五个节段。结果：正常下肢４８０个静脉节段的生理性返流时间９５％正常参考值上限为０．５ｓ。以静脉造影为对照，患肢异常节段较正常节段返流时间显著延长（Ｐ＜０．０１），以返流时间＞０．５ｓ做为静脉瓣病理返流的标准，立位乏氏法和挤压法的敏感性分别为８１．６％、８５．７％，特异性１００％、９０．９％和准确性８５．０％、８６．７％。结论：本文提示ＣＤＦＩ是无创性评价静脉瓣功能不全敏感且准确的方法。

Venous Valvular Reflux in Lower LimBs Assessed By Color Doppler Flow Imaging

Purpose:To explore the accuracy of venous valvular reflux assessed By CDFI.Methods:30 lower limB veins with CVI and 40 normal limB veins were studied.The lower limB veins were divided into 5 segments:CFV,SFV,PPV,PTV and SFJ.The CVI limBs were also examined By phyleBography.Result:Physiological valvular reflux times of 480 normal segments were 0.23±0.14 sec,the 95% normal upper limit value was 0.5 sec.The reflux times in CVI limB reflux segments confirmed By phyleBography were significantly longer than that in normal segment( P <0.01).The reflux time >0.5 sec as the standard for diagnosing venous valvular reflux,the sensitivity for erect Valsalva and limB compression maneuver were 81.6%,85.7%, specificity 100%,90.9% and accuracy 85.0%,86.7% respectively.Conclusion:It is suggested that CDFI were noninvasive and valuaBle and practical for assessing venous function in lower limBs.