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The sonographer should position the ultrasound probe proximally and proceed to measure proximal, mid, and distal locations in the upper arm and evaluate for flow limiting central venous stenosis (see Figure 4 and Figure 5).

Figure 4 – Assess and Measure Superficial Cephalic Vein

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Figure 5 – Assess and Measure Superficial Basilic Vein

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In order for a patient to meet the minimum candidacy requirements for endoAVF (dual catheter system), the cephalic vein and/or the basilic vein must be ≥2.5 mm in diameter (see Figure 6). 13

Figure 6 – Examples of Upper Arm Cephalic and Basilic Vein Measurements

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