Diagnostic ultrasound ( PDFDrive )

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B
C
FIG. 27.69 Arterial Steal in a Radial Artery to Cephalic Vein
Arteriovenous Fistula (AVF) in the Proximal Forearm. (A) Grayscale
image of anastomosis shows no stenosis. A, Feeding artery;
V, draining AVF vein. (B) Reversal of low direction is seen in the
radial artery just caudal (distal to the AVF anastomosis) in the radial
artery—arterial steal. (C) Reversal of low in the distal radial artery
at the wrist conirms arterial steal.
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B
C
FIG. 27.70 Severe Subclavian Vein Stenosis. (A) Monophasic
low in the medial subclavian vein does not return to baseline. (B)
Monophasic low in the caudal internal jugular vein does not return
to baseline. (C) Severe stenosis in proximal subclavian vein conirmed
at venography before angioplasty.