Asymptomatic renal artery stenosis in a renalgraft - Color Ultrasound
Title: Color Ultrasound - Asymptomatic renal artery stenosis in a renalgraft
Diagnosis: Asymptomatic renal artery stenosis in a renalgraft
Author: Dr.ROSSET Antoine
Comment: Dr. KHAN Haleem
Chapter: Vascular System
Clinical Presentation: Annual workup of a renal graft. Bloodpressure is normal as
is the renal function.
Comment: Renal artery stenosis occurs in approximately 10% ofrenal grafts. The
most frequent are anastomotic strictures butdistal donor or recipient artery stenosis can
also be seen. Themost reliable finding in Color Doppler and Duplex is an
acceleratedvelocity (Vmax> 180 cm/sec) and distant turbulent flowdownstream of
hemodynamically significant stenosis. A tardus parvuswaveform can be noted. Focal areas
of aliasing can be seen at sitesof tight renal artery stenosis. These findings can also be
presentin cases of renal artery kinking.
Description: The renal graft is in the left iliac fossa. The B modeappearance is
normal without dilatation of the urinary tract. Onthe color image a focal area of aliasing is
present at the zone ofnarrowing of the renal artery adjacent to the anastomosis.
DuplexDoppler demonstrates a high-velocity jet (Vmax > 250 cm/sec) atthe level of the
Images and Videos
No comments yet