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Fig. 4. —66-year-old man with bifurcated supraceliac aorta to superior
mesenteric artery (SMA) bypass. Intraoperative sonogram with spectral Doppler
waveform shows elevated velocity and turbulence associated with area of
angulation at proximal SMA graft anastomosis. On gray-scale image, lumen in
area of angulation remains widely opened, and velocity distal and proximal to
area of turbulence was not significantly lower. Therefore, findings were
thought to be insignificant and attributed to mild graft kinking.
