AVF ultrasound demonstration 1) physical examination 2) flow volume measurement in brachial artery (in PW mode) a) by a transverse scan - identify the brachial artery - describe diameter of brachial artery ,its course and its bifurcation into radial and ulnar arteries b) by a longitudinal scan - identify the velocity spectrum at the doppler on brachial artery - provide the measurement of the flow rate 3) Scan the anastomosis between radial artery and cephalic vein 4) Scan the cannulation segment - identify the region where proceed with cannulation (aneurysm, stenosis, valve) 5) Scan the efferent vein to cephalic arch a) by a longitudinal and transverse scan in B-mode - describe the diameter of the efferent vein , its depth from the skin, its course - analyze the walll and the lumen of vascular access - analyze the soft tissue peri-access - identify stenosis, thrombosis , wall alteration 6) Report AVG ultrasound demonstration 1) physical examination 2) flow volume measurement in brachial artery 3) Scan the anastomosis between brachial artery and graft - identify the diameter , calcification , inflow stenosis 4) Scan the cannulation segment 5) Scan the graft venous anastomosis - end to end anastomosis - end to side anastomosis - analyze the diameter ,calcification, stenosis 6) Scan the efferent vein 7) Report