Objective To evaluate the clinical application of color Doppler ultrasound in monitoring the complications of arterialvenous fistula in elderly patients. Methods The 36 hemodialysis patients over the age of 60 were enrolled, including 27 cases of autologous arteriovenous fistula and 9 cases of artificial vascular graft arteriovenous fistula. The ideal vascular access could not be established in the 9 cases due to their own conditions. Color Doppler ultrasonography was used to test the function of arteriovenous fistula and to observe its complications. Results The arteriovenous fistula in 26 cases (72.2 %) was patent in 36 elderly hemodialysis patients. The 6 cases (22.2 % ) in 27 of autogenous arteriovenous fistula and 4 cases (44.4 % ) in 9 of artificial arteriovenous fistula had complications. Conclusions Ultrasound can clearly show the position, pathway, lumen and blood flow dynamics of the transplanted autologous or artificial blood vessels in arteriovenous fistula so as to evaluate the effects of blood dialysis in elderly patients and to detect the complications for clinical reference.

Objective To evaluate the sonographic manifestations of iliac vein compression syndrome (IVCS)in elderly patients.Methods Sonographic data (including gray scale,color Doppler and spectral Doppler ultrasound)of 26 patients diagnosed with IVCS by venogram were analyzed retrospectively,and their sonographic manifestations were categorized.Results The sonographic manifestations of IVCS can be categorized into three types.Type one presented as iliac vein stenosis and an increase in focal blood flow velocity(5/26,19.2％).Type two presented as masses around the iliac vein and vein thrombosis(4/26,15.4％).Type three manifested thrombosis in the iliac vein and deep veins of lower extremity,without obvious masses or iliac vein stenosis (17/26,65.4％).Of all patients,nine were diagnosed with IVCS by ultrasound(9/26,34.6％).The other 17 patients were confirmed by venogram after suggestive ultrasound signs.Conclusions Ultrasound plays an important role in the early diagnosis of IVCS and can help decide on the need for further diagnostic tests.