Results 5 stenosis or occlusive events were found.All had abnormalities in ultrasound image, 1 had elevation in VDP, R were normal and access flow were over 400ml/min.

• 结果26例患者中5例存在通路功能不良且均出现超声显像异常，仅1例动态透析静脉压升高，未出现通路再循环升高和血流量降低。