To investigate the application value of two-dimensional ultrasound (2DUS) combined with color Doppler flow imaging (CDFI) in the diagnosis of patients with lower extremity arterial stenosis.

A total of 238 patients who were diagnosed as lower extremity arterial stenosis by digital subtraction angiography (DSA) in the Third People’s Hospital of Datong from October 2016 to October 2018 were enrolled in this study. All patients were given 2DUS combined with CDFI examination. The examination results were compared and analyzed with DSA results.

2DUS combined with CDFI found thickening, calcification, thrombosis and plaques in stenotic arteries, manifesting multicolored mosaic blood flow signals, disappeared echoless dark area in vessel lumen and solid echo. Number of mild stenosis (235 segments), moderate stenosis (174 segments) and severe stenosis (123 segments) among 238 patients with lower extremity arterial stenosis diagnosed by 2DUS combined with CDFI were not significantly different form that diagnosed by DSA(P>0.05). The accuracy, sensitivity, specificity, positive predictive value and negative predictive value of 2DUS combined with CDFI were 95.20%, 90.07%, 97.12%, 92.11% and 96.32%, respectively.

2DUS combined with CDFI has good accuracy, specificity and sensitivity in the diagnosis of lower extremity arterial stenosis, and it has prominent overall advantage. It is expected to replace DSA as the first choice for the diagnosis of lower extremity arterial stenosis.

Lower extremity arterial stenosis; Two-dimensional ultrasound; Color Doppler flow imaging; Digital subtraction angiography