Hemodynamics Study On Arterial Occlusion In Lower Extremities By Color Doppler Ultrasound

Objective: To study the hemodynamics characteristics of lumen near the heart after getting arterial occlusion in lower extremities and assess the clinical diagnostic value using color Doppler ultrasound(CDU). Methods: 35 cases of arterial occlusion in femoral artery and popliteal artery were examined with color Doppler ultrasound(CDU). Parameters for blood flow and two-dimensional sonography imagings were collected and compared with normal standard. Results: For the disease,atheromatous plaque and median to low sound substance thrombus in lumen were clearly showed by CDU. The color Doppler flow imaging showed interruption of the blood flow, the signal disappearance flow in the occlusion part. The anlysis of pulse waveform showed peak systolic velocity(PSV) decreased sharply (PSV was 54.66±22.43cm/s, P<0.001), at the same time resistive index(RI) and pulsitive index(PI) increased apparently ( RI was 0.92 + 0.21, P<0.005; PI was 6.38 + 3.24, P<0.005). The systolic acceleration time(AT) delayed significantly (AT was 0.12+0. 03s, P<0.001). Compared with normal standard, the deviation of all the four indexes showed the significant difference. Conclusions: The method of color Doppler ultrasonography for arterial occlusion as a non invasive examination is easy to practice and shows good accuracy and repentment. This method can be used in the disease for parameters of hemodynamics caused by thrombus,CDU can provide fully evidences for clinic diagnosis.CDU has the potential to be a important way in examination and follow-up for limb's arterial disease.