The ultrasound images show measurement of the vein depth (A) and internal vein diameter (B) of the right cephalic vein in the upper arm. The thick arrows show the positions of the cursors being used to measure these variables (depth: X----X; diameter: +----+).
V: vein; UP: upper.
Courtesy of Gerald A Beathard, MD, PhD.
Graphic 129818 Version 1.0
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